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Electrical equipment
77 11 322 302
"The repair procedures given by the manufacturer in this document are based on the technical specifications current when it was prepared.
The procedures may be modified as a result of changes introduced by the manufacturer in the production of the various component units and accessories from which his vehicles are constructed."
MARCH 2006
All rights reserved by Renault s.a.s.
EDITION ANGLAISE
Copying or translating, in part or in full, of this document or use of the service part reference numbering system is forbidden without the prior written authority of Renault s.a.s.
This document presents the fault finding procedure applicable to all computers with the following specifications:
2. PREREQUISITES FOR FAULT FINDING
Documentation type:
Fault finding procedures (this manual):– Assisted fault finding (integrated into the diagnostic tool), Dialogys.
Wiring Diagrams:– Visu-Schéma (CD-ROM), paper version.
Type of diagnostic tools:
– CLIP + CAN sensor
Type of special tooling required:
3. REMINDER
To run fault finding on the vehicle's computers, switch on the ignition in fault finding mode (forced + after ignition feed).
Depending on the type of vehicle equipment, proceed as follows:
To cut off + after ignition feed, proceed as follows:
Vehicle(s): Mégane II, Scénic II
Function concerned: Protection and Switching
Name of computer: Protection and Switching Unit
Program No.: C54
Vdiag No.: 48
Special tooling required
Multimeter, oscilloscope
Elé. 1681 Universal bornier
with the vehicle card in the card reader,press and hold the Start button (longer than 5 seconds) with start-up conditions not met,connect the diagnostic tool and perform the required operations.
press the Start button twice briefly (less than 3 seconds),Ensure that the + after ignition feed has been cut off by checking that the computer indicator lights on the instrument panel have gone out.
USM_V48_PRELI UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Introduction 87G
87G-2
UPCProgram No.: C54
Vdiag no.: 48
Faults
Faults are declared as either present or stored (depending on whether they appeared in a certain context and have disappeared since, or whether they remain present but have not been diagnosed within the current context).
The present or stored status of faults should be taken into consideration when the diagnostic tool is used following the + after ignition supply being switched on (without acting on the system components).
For a present fault, apply the procedure described in the Interpretation of faults section.
For a stored fault, note the faults displayed and apply the instructions in the Notes section.
If the fault is confirmed when the instructions in the Notes section are applied, the fault is present. Deal with the fault
If the fault is not confirmed, check:– the electrical lines which correspond to the fault,– the connectors on these lines (corrosion, bent pins, etc.),– the resistance of the component detected as faulty,– the condition of the wires (melted or split insulation, wear).
Conformity check
The aim of the conformity check is to check data that does not produce a fault on the diagnostic tool because the data is inconsistent. Therefore, this phase is used to:– carry out fault finding on faults that do not have a fault display, and which may correspond to a customer complaint.– check that the system is operating correctly and that there is no risk of a fault recurring after repairs.
This section gives the fault finding procedures for statuses and parameters and the conditions for checking them.
If a status is not behaving normally or a parameter is outside the permitted tolerance values, consult the corresponding fault finding page.
Customer complaints - Fault finding chart
If the test with the diagnostic tool is OK but the customer complaint is still present, the fault should be dealt with by customer complaint.
A summary of the overall procedure to follow is provided on the following page in the form of a flow chart.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Introduction 87G
87G-3
UPCProgram No.: C54
Vdiag no.: 48
4. FAULT FINDING PROCEDURE
Perform a pre-diagnostic on the system
Print the system fault finding log (available on CLIP and in the Workshop Repair Manual or
Technical Note)
Connect CLIP
noDialogue with
computer?
yes
Read the faults
noFaults
present
yes
Deal with present faults
Deal with stored faults
noThe cause is still
presentFault
solved
yes
See ALP No. 1
Conformity check
noThe cause is still
presentFault
solved
Use fault finding charts (ALPs)
noThe cause is still
presentFault
solved
Contact Techline with the completed fault finding log
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Introduction 87G
87G-4
UPCProgram No.: C54
Vdiag no.: 48
4. FAULT FINDING PROCEDURE (continued)
Wiring check
Fault finding problemsDisconnecting the connectors and/or manipulating the wiring harness may temporarily remove the cause of a fault.Electrical measurements of voltage, resistance and insulation are generally correct, especially if the fault is not present when the analysis is made (stored fault).
Visual inspectionLook for damage under the bonnet and in the passenger compartment.Carefully check the fuses, insulators and wiring harness routing.Look for signs of oxidation.
Tactile inspectionWhile manipulating the wiring harness, use the diagnostic tool to note any change in fault status from stored to present.Make sure that the connectors are properly locked.Apply light pressure to the connectors.Twist the wiring harness.If there is a change in status, try to locate the source of the fault.
Inspection of each componentDisconnect the connectors and check the appearance of the clips and tabs, as well as the crimping (no crimping on the insulating section).Make sure that the clips and tabs are properly locked in the sockets.Check that no clips or tabs have been dislodged during connection.Check the clip contact pressure using an appropriate model of tab.
Continuity, insulation and resistance checkCheck the continuity of entire lines, then section by section.Look for a short circuit to earth, to + 12 V or to another wire.If a fault is detected, repair or replace the wiring harness.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Introduction 87G
87G-5
UPCProgram No.: C54
Vdiag no.: 48
5. FAULT FINDING LOG
You will always be asked for this log:– when requesting technical assistance from the Techline,– for approval requests when replacing parts for which approval is obligatory,– to be attached to monitored parts for which reimbursement is requested. The log is needed for warranty
reimbursement, and enables better analysis of the parts removed.
6. SAFETY ADVICE
Safety rules must be observed during any work on a component to prevent any damage or injury:– make sure that the battery is properly charged to avoid damaging the computers with a low load,– use the appropriate tools,– do not touch the xenon bulbs, and do not work on the COSLAD system when it is in operation, as the voltage can
be more than 20,000 V.
IMPORTANT!
IMPORTANTAny fault on a complex system requires thorough fault finding with the appropriate tools. The FAULT FINDING LOG, which should be completed during the procedure, enables you to keep track of the procedure which is carried out. It is an essential document when consulting the manufacturer.
IT IS THEREFORE MANDATORY TO FILL OUT A FAULT FINDING LOG EACH TIME FAULT FINDING IS CARRIED OUT
UPC84 V1.1
Edition 2
List of monitored parts: Computer
FAULT FINDING LOGSystem: Passenger compartment connection unit
Page 1/2
● Administrative identification
Date 2 0
Log completed by
VIN
Engine
Diagnostic tool CLIP OPTIMA 5800 NXR
Update version
● Customer complaint
875 Door locking/unlocking fault 1070 Lighting fault 1075 Wiper fault
1194 Warning light on
Other Your comments:
● Conditions under which the customer complaint occurs
005 While driving 010 Gradual deterioration 004 Intermittently
009 Sudden fault
Other Your comments:
● Documentation used in fault finding
Fault finding procedure used
Type of fault finding manual: Workshop Repair Manual Technical Note Assisted fault finding
Fault finding manual no:
Wiring diagram used
Wiring Diagram Technical Note No:
Other documentation
Title and/or part number:
FD 15Fault finding log
page to print or photocopy - page to print or photocopy - page to print or photocopy
To be read with the Diagnostic tool (Identification screen):
FAULT FINDING LOGSystem: Passenger compartment connection unit
Page 2/2
● Computer identification and parts exchanged for the system
Part 1 part no.
Part 2 part no.
Part 3 part no.
Part 4 part no.
Part 5 part no.
Computer part no.
Supplier no.
Program no.
Software version
Calibration no.
VDIAG
● Faults found with the diagnostic tool
Fault no. Present Stored Fault name Specification
● Conditions under which fault occurs
Status or parameter no. Parameter name Value Unit
● System-specific information
Description:
● Additional information
What factors led you to replace the computer?What other parts were replaced?
Other defective functions?
Your comments:
FD 15Fault finding log
page to print or photocopy - page to print or photocopy - page to print or photocopy
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - System operation 87G
87G-8
UPCProgram No.: C54
Vdiag no.: 48 Fault finding - System operation
General operation
The Protection and Switching Unit is involved in the following functions:– Access - Safety.– Air conditioning.– Lighting.– Wipers.– Charging circuit.– Oil pressure detection.– Electric power distribution.
1 - Electric power distribution
The main function of the Protection and Switching Unit is to switch and distribute the power supply to the vehicle's systems, actuators or computers.
Part of this function is handled within the unit, but it is not electronically controlled by the computer.
+ 12 V battery supplyThe Protection and Switching Unit receives energy from the battery via the Busbar and MM connectors (tracks 6 and 4) and redistributes the + 12 V supply.
+ 12 V after ignition supplyThe UCH sends the Protection and Switching Unit the + 12 V after ignition supply request via the multiplex network. When the Protection and Switching Unit receives this request, it actuates the after ignition relay unconditionally. The signal is distributed to the sensors, actuators and computers.
2 - Charge circuit
One of the main functions of the Protection and Switching Unit is managing the charge circuit.
a) Battery– PR008 Battery voltage after rest represents the battery charge status. If PR008 is below 12.1 V in the first miles,
a Recharge Battery message is displayed on the instrument panel if the battery needs charging.
Depending on the battery charge status, the operating phase and the battery temperature, the Protection and Switching Unit determines what the voltage across the battery terminals should be.
To obtain this voltage, the Protection and Switching Unit actuates the alternator.
b) Alternator
The Protection and Switching Unit is linked to the alternator by a serial connection. The Protection and Switching Unit and the alternator communicate via this connection.
The alternator sends the Protection and Switching Unit the following signals:– Type of alternator: the Protection and Switching Unit configures itself according to the alternator specifications.– ET023 Alternator thermal fault.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - System operation 87G
87G-9
UPCProgram No.: C54
Vdiag no.: 48
The Protection and Switching Unit sends the alternator the following information:– PR006 Alternator setpoint voltage.
The Protection and Switching Unit can detect electrical or communication faults on this connection and signal them using the fault DF007 UPC-Alternator connection.
When the battery charge drops and PR008 Battery voltage after rest declines, the Protection and Switching Unit can temporarily increase PR006 Alternator setpoint voltage by 1 V for a period of 30 minutes after starting.
Before and during starting, PR006 Alternator setpoint voltage is fixed at 10.6 V.A maximum of 30 seconds after the engine has started, the Protection and Switching Unit sets PR006 Alternator setpoint voltage to the calculated optimum value.
Only on vehicles with M9R injection:The injection computer also acts on the alternator regulation voltage. The injection computer sends the maximum authorised power delivered by the engine, to the UPC computer via the multiplex network. If the power available from the engine is less than the power consumed by the alternator, the UPC computer reduces PR006 Alternator setpoint voltage.
For vehicles with any injection type except M9R:The UPC sends the alternator charge to the injection to regulate the idling speed.
3 - Keyless vehicle
Under the keyless vehicle function, the Protection and Switching Unit is involved in the starting sub-function. The computer:– receives the supply request from the passenger compartment starter via the multiplex network, as well as the clutch
pedal position,– controls the starter relay,– disables or cuts off control of this relay if there is a start inhibition signal sent by the injection or gearbox computer
via the multiplex network.
4 - Air conditioning
For the operation of the air conditioning and the role of the Protection and Switching Unit in the control of this function, see 62A, Air conditioning.
Cold loop:The computer receives the compressor switch-on request from the injection via the multiplex network.The computer controls the compressor clutch engagement relay.
Heating:The computer manages the alternator charge and sends back the signal over the multiplex network.The computer also controls the rear screen de-icing.
USM_V48_SSFON UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - System operation 87G
87G-10
UPCProgram No.: C54
Vdiag no.: 48
5 - Exterior lighting
The Protection and Switching Unit receives lighting requests from the UCH via the multiplex network.
The computer then switches the power relays:– side lights,– dipped headlights,– main beam headlights,– front fog light.
6 - Wipers
The Protection and Switching Unit receives wiping requests from the UCH via the multiplex network.The computer then switches the power relays:– low or high-speed windscreen wiper,– headlight washers pump relay.
– The Protection and Switching Unit also receives the windscreen wiper park position signal. Using this signal the computer can determine whether the blade is jammed, and decide whether to stop the wiper motor to protect it.
7 - Oil pressure detection
The Protection and Switching Unit receives the oil pressure sensor signal and distributes it over the multiplex network.
8 - Reverse gear engaged signal
The Protection and Switching Unit receives the reverse gear engaged position sensor signal and distributes it over the multiplex network.
9. Injection
The Protection and Switching Unit plays a part in the injection operation, in relation to the computer supply voltage and its sensors (see the different components that are supplied in Allocation of computer tracks).Supply malfunctions may lead to engine management customer complaints (rough idle, etc.).
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - System operation 87G
87G-11
UPCProgram No.: C54
Vdiag no.: 48
9 - Fuse fault finding
The Protection and Switching Unit can detect the condition of its fuses and indicate faults using:
To carry out fault finding on the fuses, run command AC016 Test electrical supply circuits. If a fuse is faulty, the associated fault becomes STORED.Once the fuse has been replaced or the repair completed, run command AC016 Test electrical supply circuits again to clear the fault.
Protection and Switching Unit Version
There are 4 Protection and Switching Unit versions:– N1: vehicles with a 340 W fan assembly.– N2: vehicles with a 460 W fan assembly.– N3: vehicles with a 550 W fan assembly (external relay).– N4: vehicles with 340 W, 460 W or 550 W fan assemblies + automatic gearbox and/or LPG and/or headlight
11 Oil level sensor signal 1 Track 2 oil level sensor black connector
12 Oil level sensor signal 2 Track 1 oil level sensor black connector
Connector MM
1 High-speed fan assembly supply Track 1 fan assembly black connector if climate controlTrack 2 fan assembly black connector if manual or regulated heating
2 Fan assembly + control supply Track 1 fan assembly resistor
Vdiag no.: 48 Fault finding - Replacement of components
Once a component is replaced, run VP004 Vehicle parameters (see Configuration and programming).
Switch the ignition off and on again for the configurations to be recognised.
IMPORTANTRemoving or replacing the Protection and Switching Unit computer relays is forbidden.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT 87G
87G-18
UPCProgram No.: C54
Vdiag no.: 48 Fault finding - Configurations and programming
This operation is used to configure the Protection and Switching Unit to the equipment present in the vehicle.
Procedure to follow for modifying these configurations:● Establish dialogue with the UPC.● Select the repair mode menu.● Select the write configuration menu.● Select line VP004 vehicle parameters.● Select the line corresponding to the vehicle equipment from the drop-down menus.● Confirm the configurations selected then click on confirm.● Switch the ignition off and then back on for the configurations to be recognised by the computer.● In the configuration reading menu, check that each configuration has been performed.Make sure that all the vehicle's equipment is working.
Equipment required
CLIP diagnostic tool
Configuration Configuration reading Name of configuration Choice of configuration
VP004
LC008 Gearbox type Manual/Automatic
LC007 Front fog lights WITH/WITHOUT
LC013 Headlight washers WITH/WITHOUT
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT 87G
87G-19
UPCProgram No.: C54
Vdiag no.: 48 Fault finding - Fault summary table
Summary of faults on which fault finding can be performed by the Protection and Switching Unit.(with corresponding design office codes).
DF030 9219 CLIMATE CONTROL COMPRESSOR SUPPLY CIRCUIT
DF023 921A WINDSCREEN WIPER CIRCUIT
DF018 921B LEFT-HAND MAIN BEAM HEADLIGHT CIRCUIT
DF019 921C RIGHT-HAND MAIN BEAM HEADLIGHT CIRCUIT
DF020 921D FRONT FOG LIGHT CIRCUIT
DF035 9213 COMPUTER SUPPLY
DF022 921E REAR SCREEN DE-ICER CIRCUIT
DF031 921F HEADLIGHT WASHER SUPPLY CIRCUIT
DF036 9220 STEERING COLUMN LOCK SUPPLY CIRCUIT
DF029 9221 INJECTION/STEERING COLUMN LOCK SUPPLY
DF024 9222 GAS COMPUTER SUPPLY
DF025 9223ELECTRIC POWER ASSISTED STEERING/AIRBAG
SUPPLY
DF026 9224 AUTOMATIC GEARBOX SUPPLY
DF021 9226 REVERSING LIGHT(S) CIRCUIT
DF032 9227 +12 V RELAY SUPPLY CIRCUIT
DF033 9229 FAN ASSEMBLY SUPPLY CIRCUIT
DF007 9211 UPC - ALTERNATOR CONNECTION
DF013 920F VOLTAGE REGULATION
DF012 9210 ALTERNATOR
DF027 9225 ACCESSORIES SUPPLY
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT 87G
87G-20
UPCProgram No.: C54
Vdiag no.: 48 Fault finding - Interpretation of faults
DF006 PRESENT
OR STORED
COMPUTER1.DEF: Internal electrical fault
NOTESConditions for applying the fault finding procedure to stored faults;The fault is declared present after the ignition is switched off and back on.
If the fault is present, contact the Techline.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF006 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-21
UPCProgram No.: C54
Vdiag no.: 48
DF007 PRESENT
ORSTORED
UPC - ALTERNATOR CONNECTIONCO : Open circuitCC : Short circuit to earth or to + 12 V1.DEF: Communication disrupted
NOTES
Conditions for applying the fault finding procedure to stored faults:The fault is declared present after the engine has been running for 10 minutes.
Special notes:If the Protection and Switching Unit connection is correct, its voltage is above 3 V.
CO NOTES None
Disconnect the UPC-Alternator connection from the alternator and the Protection and Switching Unit.
Check the condition of the UPC - Alternator connection at the alternator end.Check the condition of the UPC - Alternator connection at the Protection and Switching Unit end.Check the condition of Protection and Switching Unit connector MT1.Check the continuity on the UPC-Alternator connection:
Protection and Switching Unit connector MT1track 1
alternator
Replace the wiring harness if necessary.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF007 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-22
UPCProgram No.: C54
Vdiag no.: 48
DF007
CONTINUED 1
Connect the UPC-Alternator connection to the Protection and Switching Unit, and disconnect the alternator-side connection.1st procedureUsing an oscilloscope, check for a square pulse signal on the UPC-alternator connection. The test must not be carried out until the engine has been running for at least 10 minutes.Connect the oscilloscope between the UPC-alternator connection connector (on the alternator side) and a body earth.Adjust the oscilloscope as follows: – calibration: 5 V/div– Time base: 500 µs/divCheck for a square pulse signal on the oscilloscope, as shown in the diagram below:
If the signal obtained is similar, the USM is communicating with the alternator; contact Techline. If the signal obtained is different, contact Techline.2nd procedureMeasure the connection voltage on the alternator side with the multimeter. If the voltage is less than 3 V, contact Techline.
1.DEF NOTES None
Check the connections on the alternator.Check the connections on Protection and Switching Unit 12-track connector MT1.
Check that the alternator earth is connected (straps, etc.).With the engine running, switch on the heated rear screen. Measure the voltage between the alternator body earth and the vehicle earth. If the difference is greater than 1 V, check the vehicle earths. If the fault is still present, contact the Techline.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF007 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-23
UPCProgram No.: C54
Vdiag no.: 48
DF007
CONTINUED 2
CC NOTES None
Check the connections on the alternator.Check the connections on the 12-track Protection and Switching Unit MT1 connector.
Disconnect the UPC-Alternator connection from the alternator and the Protection and Switching Unit.Make sure that the UPC-Alternator connection is insulated against the + 12 V supply and earth:
Protection and Switching Unit connector MT1track 1
alternator
Replace the connection if necessary.
Measure the voltage on track 1 of Protection and Switching Unit connector MT1.If the voltage is 12 V, contact the Techline.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-24
UPCProgram No.: C54
Vdiag no.: 48
DF008PRESENT
ORSTORED
MULTIPLEX NETWORK
NOTES None.
Apply the multiplex network fault finding procedure (see 88B, Multiplexing).
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
NOTESConditions for applying the fault finding procedure to present faults:The fault is declared present when:the engine is running.
1.DEF NOTES None
Check the fitting, condition and tension of the accessories drive belt.
Check the conformity of the connections and tightness of the alternator earth.
Check that the alternator is not clogged.
Carry out command AC014 Alternator Regulation, and check its interpretation.
If the fault is still present, contact the Techline.
2.DEF NOTES None
– Check the fitting, condition and tension of the accessories drive belt.– Check the conformity of the connections and tightness of the alternator earths.– Check that the alternator is not clogged.– Carry out command AC014 Alternator Regulation, and check its interpretation.– If the fault is still present, contact the Techline.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF012 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-26
UPCProgram No.: C54
Vdiag no.: 48
DF013 PRESENT
ORSTORED
VOLTAGE REGULATION1.DEF : Voltage too low2.DEF: Voltage too high
NOTES
Deal with fault DF012 Alternator if it is present or stored first.Conditions for applying the fault finding procedure to present faults:The fault is declared present after:when the engine is running.
Check the insulation and continuity of the connection between the alternator and the battery.
Check that the alternator earth is sound.
Check command PR004 Battery voltage and carry out fault finding on the battery and charge circuit (see Technical Note 6014A, Check the charging circuit) if not correct.Run command AC014 Alternator regulation. In the event of a fault, apply the procedure for dealing with command AC014.If the fault is still present, contact the Techline.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF013 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-27
UPCProgram No.: C54
Vdiag no.: 48
DF014PRESENT
ORSTORED
LEFT-HAND SIDE LIGHT CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that the front left-hand side light bulb is sound.Repair if necessary.
Check the condition and connection of the 2-track connector on the front left-hand side light (tabs broken, bent, oxidised).Repair if necessary.
Check that earth on track 2 of the front left-hand side light connector is perfect.Repair if necessary.
Check the condition and connection of the Protection and Switching Unit 8-track connector AN (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 5 track 5 of the front left-hand side light connector
Repair if necessary.
Check the fitting and switch on the front left-hand side light.Repair if necessary or replace the light if it is faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF014 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-28
UPCProgram No.: C54
Vdiag no.: 48
DF014
CONTINUED
CCO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F1 (7.5A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 5 track 2 of the front left-hand side light connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-29
UPCProgram No.: C54
Vdiag no.: 48
DF015PRESENT
ORSTORED
RIGHT-HAND SIDE LIGHT CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that the front right-hand side light bulb is sound.Repair if necessary.
Check the condition and connection of the 2-track connector on the front right-hand side light (tabs broken, bent, oxidised).Repair if necessary.
Check that the earth on track 2 of the front right-hand side light connector is perfect.Repair if necessary.
Check the condition and connection of the Protection and Switching Unit 8-track connector AN (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 1 track 5 of the front right-hand side light connector
Repair if necessary.
Check the fitting and switch on the front right-hand side light.Repair if necessary or replace the light if it is faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF015 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-30
UPCProgram No.: C54
Vdiag no.: 48
DF015
CONTINUED
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F2 (7.5A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 1 track 5 of the front right-hand side light connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-31
UPCProgram No.: C54
Vdiag no.: 48
DF016PRESENT
ORSTORED
LEFT-HAND DIPPED BEAM HEADLIGHT CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that the left-hand dipped beam headlight bulb is sound.Repair if necessary.
Check the condition and connection of the left-hand headlight 4 track connector (tabs bent, broken, oxidised).Repair if necessary.
Check that the earth on track 1 of the left-hand headlight connector is perfect.Repair if necessary.
Check the condition and connection of the Protection and Switching Unit 8-track connector AN (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 4 track 2 of the left-hand headlight connector
Repair if necessary.
Check the fitting and switch on the left-hand headlight.Repair if necessary or replace the light if it is faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF016 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-32
UPCProgram No.: C54
Vdiag no.: 48
DF016
CONTINUED
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F4 (10A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 4 track 2 of the left-hand headlight connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-33
UPCProgram No.: C54
Vdiag no.: 48
DF017PRESENT
ORSTORED
RIGHT-HAND DIPPED BEAM HEADLIGHT CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that the right-hand dipped beam headlight bulb is sound.Repair if necessary.
Check the condition and connection of the right-hand headlight 4-track connector (tabs bent, broken, oxidised).Repair if necessary.
Check that the earth on track 1 of the right-hand headlight connector is perfect.Repair if necessary.
Check the condition and connection of the Protection and Switching Unit 8-track connector AN (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 6 track 2 of the right-hand headlight connector
Repair if necessary.
Check the fitting and switch on the right-hand headlight.Repair if necessary or replace the light if it is faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF017 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-34
UPCProgram No.: C54
Vdiag no.: 48
DF017
CONTINUED
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F3 (10A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 6 track 2 of the right-hand headlight connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-35
UPCProgram no.: C54
Vdiag no.: 48
DF018PRESENT
ORSTORED
LEFT-HAND MAIN BEAM HEADLIGHT CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that the left-hand main beam headlight bulb is sound.Repair if necessary.
Check the condition and connection of the left-hand headlight 4 track connector (tabs bent, broken, oxidised).Repair if necessary.
Check that the earth on track 1 of the left-hand headlight connector is perfect.Repair if necessary.
Check the condition and connection of the Protection and Switching Unit 8-track connector AN (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 7 track 4 of the left-hand headlight connector
Repair if necessary.
Check the fitting and switch on the left-hand headlight.Repair if necessary or replace the light if it is faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF018 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-36
UPCProgram No.: C54
Vdiag no.: 48
DF018
CONTINUED
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F6 (10A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 7 track 4 of the left-hand headlight connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-37
UPCProgram No.: C54
Vdiag no.: 48
DF019PRESENT
ORSTORED
RIGHT-HAND MAIN BEAM HEADLIGHT CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that the right-hand main beam headlight bulb is sound.Repair if necessary.
Check the condition and connection of the right-hand headlight 4-track connector (tabs bent, broken, oxidised).Repair if necessary.
Check that the earth on track 1 of the right-hand headlight connector is perfect.Repair if necessary.
Check the condition and connection of the Protection and Switching Unit 8-track connector AN (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 8 track 4 of the right-hand headlight connector
Repair if necessary.
Check the fitting and switch on the right-hand headlight.Repair if necessary or replace the light if it is faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF019 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-38
UPCProgram No.: C54
Vdiag no.: 48
DF019
CONTINUED
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F7 (10A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 8 track 4 of the right-hand headlight connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-39
UPCProgram No.: C54
Vdiag no.: 48
DF020 PRESENT
OR STORED
FRONT FOG LIGHTS CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that the front fog light bulbs are sound.Repair if necessary.
Check the condition and connection of the front fog light 2-track connectors (tabs broken, bent, oxidised).Repair if necessary.
Check that the earth on track 1 of the front right-hand fog light connector is perfect.Repair if necessary.
Check that the earth on track 1 of the front left-hand fog light connector is perfect.Repair if necessary.
Check the condition and connection of the Protection and Switching Unit 8-track connector AN (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 2 track 1 of the front left-hand fog light connector
UPC track 3 track 1 of the front right-hand fog light connector
Repair if necessary.
Check the fitting and switch on the front fog lights.Repair if necessary or replace the light(s) if faulty.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF020 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-40
UPCProgram No.: C54
Vdiag no.: 48
DF020
CONTINUED
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F5 (20A) is correct.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 2 track 1 of the front left-hand fog light connector
UPC track 3 track 1 of the front right-hand fog light connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-41
UPCProgram No.: C54
Vdiag no.: 48
DF021PRESENT
OR STORED
REVERSING LIGHT(S) CIRCUITCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F19 (10A) is correct.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 2 track 5 of the rear left-hand light connector
track 2 of the rear right-hand light connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF021 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-42
UPCProgram No.: C54
Vdiag no.: 48
DF022PRESENT
ORSTORED
REAR SCREEN DE-ICER CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check the condition and connection of the heated rear screen (tabs broken, bent, oxidised).Repair if necessary.
Check that the earth on track 1 of the rear right-hand light connector is perfect.Repair if necessary.
Check the condition and connection of the 6-track Protection and Switching Unit CM connector (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 4 track 1 of the heated rear screen connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF022 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-43
UPCProgram No.: C54
Vdiag no.: 48
DF022
CONTINUED
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F23 (30A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 4 track 1 of the heated rear screen connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-44
UPCProgram No.: C54
Vdiag no.: 48
DF023PRESENT
ORSTORED
WINDSCREEN WIPER CIRCUITCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F9 (25A) is correct.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 4 track 5 of the windscreen wiper motor orange connector
UPC track 9 track 4 of the windscreen wiper motor orange connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF023 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-45
UPCProgram No.: C54
Vdiag no.: 48
DF024PRESENT
ORSTORED
GAS COMPUTER SUPPLYCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F16 (10A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 4 track C2 of the LPG computer connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF024 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-46
UPCProgram No.: C54
Vdiag no.: 48
DF025PRESENT
ORSTORED
ELECTRIC POWER ASSISTED STEERING/AIRBAG SUPPLYCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F10 (5A) is correct.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 8 track 7 of the airbag computer black connector
track 8 of the electric power assisted steering black connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF025 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-47
UPCProgram No.: C54
Vdiag no.: 48
DF026PRESENT
ORSTORED
AUTOMATIC GEARBOX SUPPLYCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F15 (5A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 13 track 27 of the automatic gearbox computer connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF026 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-48
UPCProgram No.: C54
Vdiag no.: 48
DF029PRESENT
ORSTORED
ENGINE MANAGEMENT/STEERING COLUMN LOCK SUPPLYCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F18 (5A) is correct.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 4 track 5 of the steering column lock 6-track black connector
track D1 of the injection computer black connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF029 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-49
UPCProgram No.: C54
Vdiag no.: 48
DF030PRESENT
ORSTORED
CLIMATE CONTROL COMPRESSOR SUPPLY CIRCUITCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F22 (10A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 10 track A of the climate control clutch 2-track grey connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF030 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-50
UPCProgram No.: C54
Vdiag no.: 48
DF031PRESENT
ORSTORED
HEADLIGHT WASHER SUPPLY CIRCUITCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F21 (15A) is correct.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 11 track 1 of the headlight washer pump 2-track black connector
UPC track 7 track 2 of the headlight washer pump 2-track black connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF031 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-51
UPCProgram No.: C54
Vdiag no.: 48
DF032PRESENT
ORSTORED
+12 V RELAY SUPPLY CIRCUITCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuses F8 (25A), F12 (20A) and F20 (20A) are correct.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC connector MN track 8 track 56 of automatic gearbox computer connector A
track A1 and A3 of the LPG solenoid valve relays
UPC connector MN track 6 track A1 of the diesel heater relay connector
UPC connector CM track 5 track 3 ABS computer connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF032 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-52
UPCProgram No.: C54
Vdiag no.: 48
DF033PRESENT
ORSTORED
FAN ASSEMBLY SUPPLY CIRCUITCO : Open circuitCC.0 : Short circuit to earth
CO NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check the condition and connection of the fan assembly 2 -track black connector (tabs broken, bent, oxidised).Repair if necessary.
Check the condition and connection of the 6-track Protection and Switching Unit MM connector (tabs broken, bent oxidised).Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 1 track 2 of the fan assembly 2-track black connector (heating)
track 1 of the fan assembly 2-track black connector (climate control)
Repair if necessary.
If the fault is still present, contact the Techline.
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check the insulation, continuity and the absence of interference resistance on the following connections:
UPC track 1 track 2 of the fan assembly 2-track black connector (heating)
track 1 of the fan assembly 2-track black connector (climate control)
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF033 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-53
UPCProgram No.: C54
Vdiag no.: 48
DF034PRESENT
ORSTORED
ALTERNATOR TYPE1.DEF: inconsistency
NOTES None.
Check, by reading configuration LC001 ALTERNATOR TYPE, that the alternator type corresponds to that fitted to the vehicle.
If the fault is still present, contact the Techline.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF034 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87G
87G-54
UPCProgram No.: C54
Vdiag no.: 48
DF035PRESENT
OR STORED
COMPUTER SUPPLY VOLTAGE1.DEF: voltage too low
NOTES
The fault is declared present after:a drop in the UPC voltage to less than 8 V for longer than 10 seconds.
The fault is declared stored following:a drop in the UPC voltage to less than 8 V for longer than 10 seconds followed by a rise in the voltage to more than 8 V.
Contact the Techline.
AFTER REPAIRClear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF035 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of faults 87GUPCProgram No.: C54
Vdiag no.: 48
DF036PRESENT
OR STORED
STEERING COLUMN LOCK SUPPLY CIRCUITCC.0 : Short circuit to earth
CC.0 NOTESTo display this fault as present or stored, run command AC016 Test electrical supply circuits.
Check that UPC fuse F11 (15A) is correct.
Check the insulation, continuity and the absence of interference resistance of the following connection:
UPC track 10 track 2 of UCH connector PP2
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIRRun command AC016 Test electrical supply circuits.Clear the computer fault memory, switch the + after ignition supply off and back on, and run another check with the diagnostic tool.
USM_V48_DF036 UPC84 V1.1
Edition 287G-55
ENGINE COMPARTMENT CONNECTION UNIT 87G
87G-56
UPCProgram No.: C54
Vdiag no.: 48 Fault finding - Conformity check
Main screen
NOTESOnly carry out this conformity check after a full check using the diagnostic tool (fault reading and configuration checks).Application conditions: engine stopped, + after ignition feed active.
Order FunctionParameter or Status checked or Action
Display and Notes Fault finding
1 Battery voltage PR004: Battery voltage 11 V < X < 13.5 V
If there is a fault, refer to the procedure for dealing with parameter PR004 Battery
voltage.
2 Reverse gear ET004:Reverse gear
engagedYESNO
In the event of a fault, refer to the interpretation of
status ET004.
3 Oil pressure ET027:Oil pressure
contactOPEN
CLOSEDNone
4+ 12 V after ignition feed
ET003:+ 12 V after ignition feed relay control
INACTIVEACTIVE
None
USM_V48_CCONF UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check 87G
87G-57
UPCProgram No.: C54
Vdiag no.: 48
Keyless vehicle
Sub-function: starting
NOTESOnly carry out this conformity check after a full check using the diagnostic tool (fault reading and configuration checks).Application conditions: engine stopped, + after ignition feed active.
Order FunctionParameter or Status checked or Action
Display and Notes Fault finding
1+ 12 V after ignition feed
AC015:+ 12 V after ignition feed
This command is used to activate the
+ after ignition feed
In the event of a fault, run fault finding on the battery
and the charge circuit (see Technical
Note 6014A, Checking the charge circuit, 16A,
Starting-charging).
2 Reverse gear ET004:Reverse gear
engagedYESNO
In the event of a fault, refer to the interpretation of
status ET004.
3Manual gearbox
gear lever position
ET005:Manual gearbox
gear lever position
NOT IN NEUTRALNEUTRAL
Normal statuses.
UNAVAILABLEINVALID
In the event of a fault, consult the interpretation
for status ET005.
4Starting
conditions metET010:
Starting conditions met
STATUS 1STATUS 2STATUS 3
In the event of a fault, consult the interpretation
for status ET010.
YES Normal status.
5+ 12 V after ignition feed relay control
ET003:+ 12 V after ignition feed relay control
INACTIVEACTIVE
In the event of a fault, consult the interpretation
of fault DF032.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check 87G
87G-58
UPCProgram No.: C54
Vdiag no.: 48
FUNCTION: AIR CONDITIONING
Sub-function: HEATING
NOTESOnly carry out this conformity check after a full check using the diagnostic tool (fault reading and configuration checks).Application conditions: engine stopped, + after ignition feed active.
Order FunctionParameter or Status checked or Action
Display and Notes Fault finding
1 Alternator PR010: Alternator
0 < X < 99 %Switch on the heated rear screen and check that the
value increases
In the event of a fault, consult the
interpretation of parameter PR010.
2Rear screen
de-icerAC011:
Rear screen de-icer
This command supplies the rear screen and door mirror heating resistors, if fitted to the vehicle. They
should be warm.
In the event of a fault, apply the procedure
for dealing with command AC011.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check 87G
87G-59
UPCProgram No.: C54
Vdiag no.: 48
Sub-function: Cold loop
Order FunctionParameter or Status checked or Action
Display and Notes Fault finding
1Compressor
controlAC008:
Compressor control
You should be able to hear the compressor
clutch (stops the motor running).
In the event of a fault, apply the procedure
for dealing with command AC008.
2 Fan assembly
AC009:Low-speed fan
assembly
This command is used to activate the fan assembly
at low speed.
In the event of a fault, apply the procedure
for dealing with command AC009.
AC010:High-speed fan
assembly
This command is used to activate the fan assembly
at high speed.
In the event of a fault, apply the procedure
for dealing with command AC010.
3
Low-speed engine fan
assembly relay control
ET014:
Low-speed engine fan
assembly relay control
INACTIVEACTIVE
In the event of a fault, consult the
interpretation for status ET014.
4
High-speed engine fan
assembly relay control
ET013:
High-speed engine fan
assembly relay control
INACTIVEACTIVE
In the event of a fault, consult the
interpretation for status ET013.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check 87G
87G-60
UPCProgram No.: C54
Vdiag no.: 48
FUNCTION: WIPING
Sub-function: WIPING POWER
NOTESOnly carry out this conformity check after a full check using the diagnostic tool (fault reading and configuration checks).Application conditions: engine stopped, + after ignition feed active.
Order FunctionParameter or Status checked or Action
Display and Notes Fault finding
1 Wiper
AC004: Low-speed wiperThis command is used to activate the windscreen
wiper motor at low speed. In the event of a fault, apply the procedure
for commands AC005 and AC006AC006:
High-speed wiper
This command is used to activate the windscreen
wiper motor at high speed.
2Windscreen
wiper protectionET002:
Windscreen wiper protection
INACTIVE
In the event of a fault, refer to the
interpretation for status ET002.
3Windscreen wiper park
positionET018:
Windscreen wiper park
position
PRESENT (if the wiper is not active)ABSENT
In the event of a fault, refer to the
interpretation of status ET018.
4Headlight washer
AC013:Headlight
washers relay
This command is used to activate the headlight
washers relay on the right and left-hand side
alternately.
In the event of a fault, apply the procedure
for dealing with command AC013.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check 87G
87G-61
UPCProgram No.: C54
Vdiag no.: 48
FUNCTION: LIGHTING
Sub-function: LIGHTING POWER
NOTESOnly carry out this conformity check after a full check using the diagnostic tool (fault reading and configuration checks).Application conditions: engine stopped, + after ignition feed active.
Order FunctionParameter or Status checked or Action
Display and Notes Fault finding
1 Side lights AC003: Side lightsThis command
switches on the side lights.
In the event of a fault, apply the procedure for dealing
with command AC003.
2Dipped
headlightsAC002:
Dipped headlights
This command switches on the
dipped beam headlights.
In the event of a fault, apply the procedure for dealing
with command AC002.
3Main beam headlights
AC001:Main beam headlights
This command switches on the main
beam headlights.
In the event of a fault, apply the procedure for dealing
with command AC001.
4 Front fog lights AC004: Front fog lightsThis command
switches on the front fog lights.
In the event of a fault, apply the procedure for dealing
with command AC004.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check 87G
87G-62
UPCProgram No.: C54
Vdiag no.: 48
FUNCTION: CHARGE CIRCUIT
Sub-function: ALTERNATOR
NOTESOnly carry out this conformity check after a full check using the diagnostic tool (fault reading and configuration checks).Application conditions: engine running.
Order FunctionParameter or Status checked or Action
Display and Notes Fault finding
1 Alternator fault ET023:Alternator
thermal faultABSENT
In the event of a fault, consult the interpretation
of status ET023.
3 Alternator PR010: Alternator
0 < X < 99 %Switch on the heated rear screen and check
that the value increases
In the event of a fault, apply the procedure for dealing
with command PR010 Alternator Charge.
4Alternator regulation
AC014:Alternator regulation
Run this command with the engine
running.When the command is
run, the Protection and Switching Unit sets a regulation
voltage setpoint for the alternator:
– Alternator voltage = 15 V for
30 seconds– Alternator voltage
= 13 V for 30 seconds
In the event of a fault, apply the procedure for dealing
with command AC014.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Conformity check 87G
87G-63
UPCProgram No.: C54
Vdiag no.: 48
FUNCTION: CHARGE CIRCUIT
Sub-function: BATTERY
NOTESOnly carry out this conformity check after a full check using the diagnostic tool (fault reading and configuration checks).Application conditions: engine stopped, + after ignition feed active.
Order FunctionParameter or Status checked or Action
Display and Notes Fault finding
1 Voltages
PR004: Battery voltage 11 < X < 13.5 V
If there is a fault, apply the procedure for dealing with command PR004 Battery
voltage.
PR008:Battery voltage
after rest12.1 V < X < 13.5 V
If there is a fault, apply the procedure for dealing with command PR008 Battery
voltage after rest.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT 87G
87G-64
UPCProgram No.: C54
Vdiag no.: 48 Fault finding - Status summary table
Tool status Diagnostic tool title
ET002 Windscreen wiper protection
ET003 + 12 V after ignition feed relay control
ET004 Reverse gear engaged
ET010 Starting conditions met
ET021 Alternator electrical fault
ET022 Alternator mechanical fault
ET023 Alternator thermal fault
ET013 High-speed fan assembly relay control
ET014 Low-speed fan assembly relay control
ET005 Manual gearbox gear lever position
ET018 Windscreen wiper park position
ET027 Oil pressure contact
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT 87G
87G-65
UPCProgram No.: C54
Vdiag no.: 48 Fault finding - Interpretation of statuses
ET002
WINDSCREEN WIPER PROTECTION
NOTES
Special notes:Only apply the checks if the status is ACTIVE or LOCKED.If the status is ACTIVE, this means that after a wiping request, the UPC detected abnormal operation for more than 6 seconds (restricted or jammed).If the status is LOCKED, this means that the total duration of pauses is greater than 2 minutes.The status returns to INACTIVE as soon as the UCH requests another wiping setpoint (wiper control adjusted or request by the rain sensor).
Make sure that nothing is mechanically blocking the movement of the wiper arms (blades stuck, condition and assembly of the wiper mechanism linkage and no object that could impair the movement of the mechanism).Check that the windscreen wiper mechanism is not seized.Repair if necessary.
Check the condition and connection of connectors CT1 and CN on the UPC and the windscreen wiper motor.Repair if necessary.
Check the insulation, continuity and the absence of interference resistance of the following connections:
Protection and Switching Unit connector CT1track 10
track 2 of the windscreen wiper motor connector
UPC connector CN track 4 track 5 of the windscreen wiper motor connector
UPC connector CN track 9 track 4 of the windscreen wiper motor connector
Repair if necessary.
If everything is in order but the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
USM_V48_ET002 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses 87G
87G-66
UPCProgram No.: C54
Vdiag no.: 48
ET004
REVERSE GEAR ENGAGED
NOTES
Special notes:Only apply the checks if:– + after ignition feed is active.– There must be no faults present.
5-speed manual gearbox
Check the condition and connection of the reverse gear switch connector and UPC connector MN.Repair if necessary.
With the ignition on and reverse gear engaged, check for + 12 V on tracks 11 and 14 of UPC connector MN.If this is not correct, check for insulation, continuity and the absence of interference resistance on the following connections:
Protection and Switching Unit connector MNtrack 14
track 2 neutral sensor
Protection and Switching Unit connector MNtrack 11
track 1 neutral sensor
Reverse gear engaged:
Switch track 1 track 2 of the switch
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
USM_V48_ET004 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses 87G
87G-67
UPCProgram No.: C54
Vdiag no.: 48
ET004
CONTINUED
6-speed manual gearbox
Check the condition and connection of the reverse gear switch connector and UPC connector MN.Repair if necessary.
With the ignition on and reverse gear engaged, check for + 12 V on tracks 11 and 14 of UPC connector MN.If this is not correct, check for insulation, continuity and the absence of interference resistance on connections:
Protection and Switching Unit connector MNtrack 11
track 2 neutral sensor
Protection and Switching Unit connector MNtrack 14
track 1 neutral sensor
Reverse gear engaged:
Switch track 1 track 2 of the switch
Repair if necessary.
If the fault is still present, contact the Techline.
Automatic gearbox
Check the condition and connection of the reverse gear switch connector and UPC connector MN.Repair if necessary.
With the ignition on and reverse gear engaged, check for + 12 V on tracks 11 and 14 of UPC connector MN.If this is not correct, check for insulation, continuity and the absence of interference resistance on connections:
Protection and Switching Unit connector MNtrack 14
track A2, multifunction switch
Protection and Switching Unit connector MNtrack 11
track A1 multifunction switch
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses 87G
87G-68
UPCProgram No.: C54
Vdiag no.: 48
ET010
STARTING CONDITIONS MET
NOTESSpecial notes:Apply the checks if the status is STATUS 1, STATUS 2 OR STATUS 3, with the ignition on.
STATUS 1
The UCH is preventing the Protection and Switching Unit from activating the starter.Run fault finding on this computer (see 87B, UCH).
STATUS 2
The injection is preventing the Protection and Switching Unit from running the starter.Run fault finding on this computer (see 13B, Diesel injection and 17B, Petrol injection).
STATUS 3
The automatic gearbox computer is preventing the Protection and Switching Unit from running the starter.Make sure that the selector lever is in position P or N.Run fault finding on this computer (see 23A, automatic gearbox).
If the conditions are met and the starter does not work, refer to ALP 2.
If the fault is still present, contact your Techline.
AFTER REPAIR Repeat the conformity check from the start.
USM_V48_ET010 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses 87G
87G-69
UPCProgram No.: C54
Vdiag no.: 48
ET021
ALTERNATOR ELECTRICAL FAULT
NOTESSpecial notes:Apply the checks if the status is PRESENT with the engine running.
Check the condition and connection of the alternator connector and Protection and Switching Unit connector MT.
If status ET022 Alternator mechanical fault is PRESENT, check the condition and tension of the accessories belt.Replace the belt if necessary.If status ET022 Alternator mechanical fault is ABSENT, check the charging circuit (see Technical Note 6014A, Checking the charging circuit, 16A, Starting-charging).Replace the alternator if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
USM_V48_ET021 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses 87G
87G-70
UPCProgram No.: C54
Vdiag no.: 48
ET022
ALTERNATOR MECHANICAL FAULT
NOTESSpecial notes:Apply the checks if the status is PRESENT with the engine running.
Check the condition and tension of the accessories belt.Replace the belt if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
USM_V48_ET022 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of statuses 87G
87G-71
UPCProgram No.: C54
Vdiag no.: 48
ET023
ALTERNATOR THERMAL FAULT
NOTES Special notes: Apply the checks if the status is PRESENT, with the engine running.
Stop the engineCheck the general condition of the alternator:Make sure that there are no foreign bodies that could impair the alternator cooling.Clean the alternator if necessary.
With the engine stopped, let the alternator cool down with the bonnet open for at least 1 hour.
Start the engine with the bonnet closed.Switch on the main beam headlights and rear screen de-icer.If the status returns to PRESENT, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
Vdiag no.: 48 Fault finding - Interpretation of parameters
PR004
BATTERY VOLTAGE
NOTES None
Check the consistency between the battery voltage measurement from the multimeter and the value of PR004 Battery voltage.Engine stopped: 11 V < X < 13.5 V.Engine running: 10.5 V < X < 16 V.If the voltage values are not consistent (greater than 0.3 V difference between the 2 values), check the connection between the + battery feed and the Protection and Switching Unit.If the values are consistent, carry out fault finding on the battery and the charge circuit (see Technical Note 6014, Checking the charging circuit, 16A, Starting-charging).
AFTER REPAIR Repeat the conformity check from the start.
USM_V48_PR004 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters 87G
87G-74
UPCProgram No.: C54
Vdiag no.: 48
PR006
ALTERNATOR SETPOINT VOLTAGE
NOTES
Priority in dealing with fault:– if fault DF007 UPC-alternator connection is declared present, deal with this fault
first.– if one of statuses ET021 Alternator electrical fault, ET022 Alternator mechanical
fault, ET023 Alternator thermal fault is present, deal with these statuses first.Special notes: Only apply the checks if:– the engine is running,– the parameter value is inconsistent with the voltage value measured between the
alternator B+ terminal and the alternator chassis earth.
Wait for 10 minutes with the engine running.After 10 minutes, if fault DF007 UPC-alternator connection is declared present, deal with the fault.Measure the voltage at the alternator terminals, between the B+ terminal and the alternator chassis earth.
Run AC014 Alternator regulation.Wait 20 seconds,for 10 seconds the alternator voltage should be 15 V ± 0.2.
Wait 20 seconds,for 10 seconds the alternator voltage should be 13 V ± 0.2.
Switch on the heated rear screen and the main beam headlights.Run AC014 Alternator regulation again.
Wait 20 seconds,for 10 seconds the alternator voltage should be 15 V ± 0.2.
Wait 20 seconds,for 10 seconds the alternator voltage should be 13 V ± 0.2.
If the values obtained are not correct, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
USM_V48_PR006 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters 87G
87G-75
UPCProgram No.: C54
Vdiag no.: 48
PR008
BATTERY VOLTAGE AFTER REST
NOTESThis value can only be interpreted after the engine and electrical consumers have been stopped for at least 8 hours.
Check the consistency between the battery voltage measurement from the multimeter and the value of PR008 Battery voltage after rest.
This value must be between 12.1 V < X < 13.5 V
If the voltage values are not consistent (greater than 0.3 V difference between the 2 values), check the connection between the + battery feed and the Protection and Switching Unit.
If the voltage values are consistent, carry out fault finding on the battery and the charge circuit (see Technical Note 6014, Checking the charging circuit, 16A, Starting-charging).
AFTER REPAIR Repeat the conformity check from the start.
USM_V48_PR008 UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of parameters 87G
87G-76
UPCProgram No.: C54
Vdiag no.: 48
PR010
ALTERNATOR CHARGE
NOTES If fault DF007 UPC-alternator connection is declared present, deal with this fault first.
Is parameter PR008 Battery voltage after rest greater than 12.2 V?
YES
Start the engine and let it idle for 5 minutes.Deactivate the climate control request.Check that the fan assemblies are not running.Without electrical consumers running, check that PR010 Alternator Charge is below 50 %.Switch on the heated rear screen and the main beam headlights.Wait 20 seconds and check that PR010 Alternator charge has increased but remains below 100 %.If PR010 Alternator charge is locked at 100 %, contact the Techline.
NO
Start the engine and let it idle for 30 minutes.Deactivate the climate control request.Check that the fan assemblies are not running.Switch on the heated rear screen and the main beam headlights.Wait 20 seconds and check that PR010 Alternator charge has increased but remains below 100 %.If PR010 Alternator charge is locked at 100 %, contact the Techline.
If the fault is still present, carry out fault finding on the battery and charge circuit (see Technical Note 6014; Checking the charging circuit, 16A, Starting-charging).
AFTER REPAIR Repeat the conformity check from the start.
Vdiag no.: 48 Fault finding - Interpretation of commands
AC001
MAIN BEAM HEADLIGHTS
NOTESCheck the condition and connections of fuses 6 (10A) and 7 (10A) on the Protection and Switching Unit. Replace them, if necessary.Check the condition and connections of the bulbs. Replace them, if necessary.
Check the condition and connection of the headlight connectors.Repair if necessary.
Check for earth on track 1 of the headlight.Repair if necessary.
Check for +12 V on track 4 of the headlight while the command is running.If the value is correct, check the continuity and insulation between the bulb and the headlight connector.
Check the condition and connection of connector AN and the fuses on the Protection and Switching Unit.Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connections:
Protection and Switching Unit connector ANtrack 7
track 4 left-hand headlight connector
Protection and Switching Unit connector ANtrack 8
track 4 right-hand headlight connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-79
UPCProgram No.: C54
Vdiag no.: 48
AC002
DIPPED HEADLIGHTS
NOTESCheck the condition and connections of fuses 3 (10A) and 4 (10A) on the Protection and Switching Unit. Replace them, if necessary.Check the condition and connections of the bulbs. Replace them, if necessary.
Check the condition and connection of the headlight connectors.Repair if necessary.
Check for earth on track 1 of the headlight.Repair if necessary.
Check for +12 V feed on track 2 of the headlight while the command is running.If the value is correct, check the continuity and insulation between the bulb and the headlight connector.
Check the condition and connection of connector AN and the fuses on the Protection and Switching Unit.Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connections:
Protection and Switching Unit connector ANtrack 4
track 2 of the left-hand headlight connector
Protection and Switching Unit connector ANtrack 6
track 2 of the right-hand headlight connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-80
UPCProgram No.: C54
Vdiag no.: 48
AC003
SIDE LIGHTS
NOTESCheck the condition and connections of fuses 1 (7.5A) and 2 (7.5A) on the Protection and Switching Unit. Replace them, if necessary.Check the condition and connections of the bulbs. Replace them, if necessary.
Check the condition and connection of the headlight connectors.Repair if necessary.
Check for earth on track 1 of the headlight.Repair if necessary.
Check for +12 V on track 5 of the headlight while the command is running.If the value is correct, check the continuity and insulation between the bulb and the headlight connector.
Check the condition and connection of connector AN and the fuses on the Protection and Switching Unit.Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connections:
Protection and Switching Unit connector ANtrack 5
track 5 left-hand headlight connector
Protection and Switching Unit connector ANtrack 1
track 5 right-hand headlight connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-81
UPCProgram No.: C54
Vdiag no.: 48
AC004
FRONT FOG LIGHTS
NOTES
Use this command only for vehicles fitted with front fog lights.Check the condition and connection of fuse 5 (20A) on the Protection and Switching Unit. Replace it if necessary.Check the condition and connection of the bulbs. Replace them, if necessary.
Check the condition and connection of the bulb connectors.Repair if necessary.
Check for earth on the bulb connectors.Repair if necessary.
Check for the + 12 V feed on the bulb connectors while the command is running.If the value is correct, replace the bulb(s).
Check the condition and connection of connector AN on the Protection and Switching Unit.Repair if necessary.
Check for insulation, continuity and the absence of interference resistance on the following connections:
Protection and Switching Unit connector ANtrack 2
track 1 left-hand fog light connector
Protection and Switching Unit connector ANtrack 3
track 1 right-hand fog light connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-82
UPCProgram No.: C54
Vdiag no.: 48
AC005
WINDSCREEN WIPER LOW SPEED
NOTESCheck the condition and connection of fuse 9 (25A) on the Protection and Switching Unit. Replace it if necessary.Make sure that status ET002 Windscreen wiper protection remains INACTIVE.
Check the condition and connections of the wiper motor.Repair if necessary.
Check the earth of track 1 of the wiper motor.Repair if necessary.
Check for the + 12 V feed on track 4 of the wiper motor while the command is running.If the value is correct, replace the motor.
Check the condition and connection of connector CN and the fuses on the Protection and Switching Unit.Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connection:
Protection and Switching Unit connector CNtrack 9
track 4 windscreen wiper motor
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-83
UPCProgram No. C54
Vdiag no.: 48
AC006
WINDSCREEN WIPER HIGH SPEED
NOTESCheck the condition and connection of fuse 9 (25A) on the Protection and Switching Unit. Replace it if necessary.Make sure that status ET002 Windscreen wiper protection remains INACTIVE.
Check the condition and connections of the wiper motor.Repair if necessary.
Check the earth of track 1 of the wiper motor.Repair if necessary.
Check for + 12 V on track 5 of the wiper motor while the command is running.If the value is correct, replace the motor.
Check the condition and connection of connector CN and the fuses on the Protection and Switching Unit.Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connection:
Protection and Switching Unit connector CNtrack 4
track 5 windscreen wiper motor
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-84
UPCProgram No.: C54
Vdiag no.: 48
AC008
COMPRESSOR CONTROL
NOTESActivating the command with the engine running is prohibited.Check the condition and connection of fuse 22 (10A) on the Protection and Switching Unit.
Check the condition and connection of the climate control compressor connector.Repair if necessary.
Make sure that the compressor is earthed.Repair if necessary.
Check for + 12 V on track A of the compressor while the command is running.If not correct:Check the condition and connection of connector MN on the Protection and Switching Unit.Repair if necessary.
Check the insulation, continuity and the absence of interference resistance on the following connection:
Protection and Switching Unit connector MNtrack 10
track A compressor connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-85
UPCProgram No. C54
Vdiag no.: 48
AC009
LOW-SPEED FAN ASSEMBLY
NOTES Make sure nothing is hindering the rotation of the blades.
Check the condition and connection of the engine cooling fan connector.Repair if necessary.
Ensure that track 2 of the engine cooling fan is earthed.Repair if necessary.
Check for + 12 V feed on the fan assembly while the command is running.If correct, replace the fan assembly.If this is not correct, check for insulation, continuity and the absence of interference resistance on the following connection:
Protection and Switching Unit connector MMtrack 2
track 1 of the engine cooling fan
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-86
UPCProgram No. C54
Vdiag no.: 48
AC010
HIGH-SPEED FAN ASSEMBLY
NOTES Make sure nothing is hindering the rotation of the blades.
Check the condition and connection of the engine cooling fan connector.Repair if necessary.
Ensure that track 2 of the engine cooling fan is earthed.Repair if necessary.
Check for + 12 V feed on the fan assembly while the command is running.If correct, replace the fan assembly.If not correct, check the continuity and insulation on the following connection:
Protection and Switching Unit connector MMtrack 1
track 1 of the fan assembly
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-87
UPCProgram No. C54
Vdiag no.: 48
AC011
REAR SCREEN DE-ICER
NOTESCheck the condition and connection of fuse 23 (30A) on the Protection and Switching Unit. Replace it if necessary.
REAR SCREEN
Check the condition and connection of the rear screen connectors.Repair if necessary.
Check that the resistance of the rear screen is neither zero nor infinity.Make sure that the rear screen is earthed.
Check for + 12 V feed on the rear screen terminal while the command is running.If not correct:Check the condition and connection of connector CM and the fuses on the Protection and Switching Unit.Repair if necessary.
Check for insulation, continuity and the absence of interference resistance on the following connection:
Protection and Switching Unit connector CMtrack 4
track 1 rear screen connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-88
UPCProgram No. C54
Vdiag no.: 48
AC013
HEADLIGHT WASHER RELAY
NOTES
Check the condition and connection of fuse 21 (15A) on the Protection and Switching Unit. Replace it if necessary.The headlight washer pump operates if the dipped headlights are lit and the windscreen washer switch is pressed and held.
Check the condition and connection of the connectors on the headlight washer pump.Repair if necessary.
To check that the pump is working properly, supply the pump's tracks directly in one direction and then the other.If the pump does not rotate, replace it.
Check for + 12 V alternately on track 2 of the headlight washer pump connector.If not correct:Check the condition and connection of connector CN.Repair if necessary.
Check the continuity, insulation and absence of interference resistance on the following connections:
Protection and Switching Unit connector CNtrack 7
track 2 of the headlight washer pump black connector
Protection and Switching Unit connector CNtrack 11
track 1 of the headlight washer pump black connector
Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-89
UPCProgram No. C54
Vdiag no.: 48
AC014
ALTERNATOR REGULATION
NOTES
Conditions for the application of the command:– engine running at idling speed and warm engine,– Climate control off,– check that the fan assembly is not in operation.– check that PR010 Alternator charge is below 50 % without electrical consumers
and below 90 % with the main beam headlights lit and rear screen de-icer activated.Effect of command:– for 30 seconds, the Protection and Switching Unit imposes a regulation voltage of
15 V ± 0.2 on the alternator.– then for another 30 seconds, the Protection and Switching Unit imposes a regulation
voltage of 13 V ± 0.2 on the alternator.
Switch off all the electrical consumers (fans, main beam headlights, etc.).
Measure the voltage across the alternator terminals between the B+ alternator terminal and the body of the alternator for the earth.
Run AC014 Alternator regulation.Wait 20 seconds,for 10 seconds the alternator voltage should be 15 V ± 0.2.
Wait 20 seconds,for 10 seconds the alternator voltage should be 13 V ± 0.2.
Switch on the heated rear screen and the main beam headlights.Run AC014 Alternator regulation again.
Wait 20 seconds,for 10 seconds the alternator voltage should be 15 V ± 0.2.
Wait 20 seconds,for 10 seconds the alternator voltage should be 13 V ± 0.2.
If the values obtained are not correct, carry out fault finding on the battery and the charge circuit (see Technical Note 6014, Checking the charging circuit, 16A, Starting-charging).
AFTER REPAIR Repeat the conformity check from the start.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT
Fault finding - Interpretation of commands 87G
87G-90
UPCProgram No.: C54
Vdiag no.: 48
AC016
TEST ELECTRICAL SUPPLY CIRCUITS
NOTES Switch off the ignition.
This command activates several electrical circuits run by the Protection and Switching Unit, and so carry out fault finding on the fuses in open circuit or short circuit.
Switch on the ignition again.Read the faults.
Deal with present faults,
AFTER REPAIR Run command AC016 Test electrical supply circuits again.
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT 87G
87G-91
UPCProgram No.: C54
Vdiag no.: 48 Fault finding - Customer complaints
NOTESRun complete fault finding on the multiplex network (see 88B, Multiplex).Carry out fault finding on the Protection and Switching Unit.
RECORDED FAULTS
NO DIALOGUE WITH THE COMPUTER ALP 1
THE STARTER DOES NOT WORK ALP 2
NO BACKLIGHTING OF THE VARIOUS FUNCTIONS IN THE PASSENGER COMPARTMENT
ALP 3
UPC84 V1.1
Edition 2
ENGINE COMPARTMENT CONNECTION UNIT 87G
87G-92
UPCProgram No.: C54
Vdiag no.: 48 Diagnostic - Fault finding charts
ALP 1 No dialogue with the computer
NOTES
Run a complete multiplex network check using the diagnostic tool.Check the condition and connection of the connectors and fuses on the UPC.Check the connection, condition and operation of relay 9 (+ after ignition feed) on the UPC.
Try the tool on another vehicle.
Check the voltage of the battery.Check the condition and connection of the battery fuse box fuses and terminals.Replace any faulty fuses.Repair if necessary.
Check for + 12 V feed on the Protection and Switching Unit bolted power terminal.Repair if necessary.
Check for earth on tracks 3 and 6 of connector CM.Repair if necessary.
Check for a + 12 V battery feed on track 16, a + 12 V after ignition supply on track 1, an earth on track 5 and on track 4 of the diagnostic socket.Repair if necessary.
If dialogue with the computer is still not possible, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.
NOTESRun a complete multiplex network check using the diagnostic tool. Using status ET010 Starting conditions satisfied, check that all the starting conditions have been fulfilled; the status should be YES.
Check the condition and connection of connector MM on the Protection and Switching Unit, and of the starter control terminal.Repair if necessary.
With the starter activated, check for 12 V feed on the starter control terminal.If correct, carry out fault finding on the starter.
Check the insulation, continuity and the absence of interference resistance on the connection between UPC connector MM track 3 and the starter control terminal.Repair if necessary.
If the fault is still present, contact the Techline.
AFTER REPAIR Repeat the conformity check from the start.