4.2 Infrared Remote Central Locking (IRCL) Contentsmanual.startekinfo.com/volumes/ba2/4_2/content.pdfCentral locking system in proper operating condition, 4. Batteries in key holder
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4.2 Infrared Remote Central Locking (IRCL) Contents –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––4.2 Model 140 up to M.Y. 1995
b Diagnostic Manual • Body and Accessories • 04/94 4.2 IRCL C/1
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Diagnosis – Function Test
Preliminary work: Check operation of central locking,see PSE/CL 11 O 1.0 – 9.0 (3.1)Check batteries in infrared transmitter key,see SMS, Repair Instructions, Job No. . . . . . . . . . . . . . . 80–420
bDiagnostic Manual • Body and Accessories • 04/95 4.2 IRCL 11/1
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Diagnosis – Function Test
Note:If the windows cannot be fully opened or closed using the one-touch feature (e.g., after the vehicle’s battery has been disconnected), re-synchronize windowsby pressing the upper half of each window switch to the 2nd detent until the window is completely closed and hold for an additional 2 seconds. Repeatprocedure for each window.
Note for models as of 12/93:If an IR transmitter is lost, it can be disabled from controlling the IRCL system by de-synchronizing the IRCL control module and then resynchronizing (recoding)the remaining IR transmitter(s). Thus, only the mechanical locks need to be replaced to assure vehicle security.
De-synchronizing/Re-synchronizing Infrared Signal for IRCL
De-synchronizing (as of 12/93 production only)1. Ground the IRCL pin in the data link connector (X11/4) for 30 - 40 seconds with the ignition ON. 2. De-synchronization can also be performed with the impulse counter scan tool by connecting the scan tool to the data link connector (see section 0), turning
the ignition ON and pressing the start button for 30 - 40 seconds. 3. The HHT can be used as well by following the menu-driven commands.
Re-synchronizing (as of 12/93 production only)
1. To synchronize the infrared transmitter, point the infrared transmitter toward a receiver and press button momentarily. Using the mechnical key, s witch onignition within 30 seconds. This will synchronize and enable the control module to recognize the infrared transmitter.
Preparation for Test:1. Battery voltage 11 – 14 V,2. Fuse F4–2 and F4–15 ok,3. Central locking system in proper operating condition,4. Batteries in key holder (infrared transmitter) ok,5. Infrared transmitter synchronized (see note below),6. Key removed from steering lock,7. Side windows lowered approx. 100 mm (4 in.),
8. Sliding/pop-up roof open,(Windows must be synchronized for steps 7 and 8, see note below)
9. Doors and trunk lid closed,10. Central locking system unlocked.
Electrical wiring diagramsSee Electrical Troubleshooting Manual, Model 140.
b Diagnostic Manual • Body and Accessories • 04/95 4.2 IRCL 11/2
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Diagnosis – Function Test
Test step/Test scope Test condition Nominal value Possible cause/Remedy 1)
O 1.0 Locking of vehicle withinfrared remote control vialeft front door IR receiver(A26/1).
Lock vehicle using IR transmitter via theleft front door.
Vehicle is locked. All red indicator lamps blink for a maximum of approx. 3 seconds (vehicles up to06/93).Red indicator lamp of receiver in leftfront door blinks for a maxium ofapprox. 3 seconds (vehicles as of07/93).
23 O 1.0 – 11.0
O 2.0 Unlocking of vehicle withinfrared remote control vialeft front door IR receiver(A26/1).
Unlock vehicle using IR transmitter viathe left front door.
Vehicle is unlocked. All green indicatorlamps blink for a maximum of approx. 3 seconds (vehicles up to06/93).Green indicator lamp of receiver in leftfront door blinks for a maxium ofapprox. 3 seconds (vehicles as of07/93).
23 O 1.0, 8.0 – 10.0, 12.0.
O 3.0 Locking of vehicle withinfrared remote control viaright front door IR receiver(A26/2).
Lock vehicle using IR transmitter via theright front door.
Vehicle is locked. All red indicator lamps blink for a maximum of approx. 3 seconds (vehicles up to06/93).Red indicator lamp of receiver in rightfront door blinks for a maxium ofapprox. 3 seconds (vehicles as of07/93).
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 11/3
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Diagnosis – Function Test
Test step/Test scope Test condition Nominal value Possible cause/Remedy 1)
O 4.0 Unlocking of vehicle withinfrared remote control viaright front door receiver(A26/2).
Unlock vehicle using IR transmitter viathe right front door.
Vehicle is unlocked. All green indicatorlamps blink for a maximum of approx. 3 seconds (vehicles up to06/93).Green indicator lamp of receiver inright front door blinks for a maxium ofapprox. 3 seconds (vehicles as of07/93).
23 O 1.0, 13.0 – 15.0, 17.0.
O 5.0 Locking of vehicle withinfrared remote control viatrunk lid receiver (A26/3).
Lock vehicle using IR transmitter via thetrunk lid.
Vehicle is locked. All red indicator lamps blink for a maximum of approx. 3 seconds (vehicles up to06/93).Red indicator lamp of receiver in trunklid blinks for a maxium of approx. 3seconds (vehicles as of 07/93).
23 O 1.0 – 7.0, 18.0 – 21.0.
O 6.0 Unlocking of vehicle withinfrared remote control viatrunk lid receiver (A26/3).
Unlock vehicle using IR transmitter viathe trunk lid.
Vehicle is unlocked. All green indicatorlamps blink for a maximum of approx. 3 seconds (vehicles up to06/93).Green indicator lamp of receiver intrunk lid blinks for a maxium of approx.3 seconds (vehicles as of 07/93).
23 O 1.0, 18.0 – 20.0, 22.0.
O 7.0 Close side windows andsliding/pop-up roof withinfrared remote control.
Point IR transmitter towards one of theIR receivers and press transmit buttonfor > 1 second.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 11/4
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Diagnosis – Function Test
Test step/Test scope Test condition Nominal value Possible cause/Remedy 1)
O 8.0 Open side windows andsliding/pop-up roof withinfrared remote control.
With the side windows and sliding/pop-uproof open, lock vehicle using infraredtransmitter. Within 10 seconds, point IRtransmitter towards one of the IRreceivers and press transmit button for> 4 seconds.
Side windows and sliding/pop-uproof open.
23 O 1.0, 8.0 – 22.0
O 9.0 Indication of an improperlyclosed door or trunk lid(vehicles up to 11/93).
Open one of the doors or the trunk lid.Lock vehicle using IR transmitter
b Diagnostic Manual • Body and Accessories • 04/94 4.2 IRCL 12/1
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Diagnosis - Diagnostic Trouble Code (DTC) Memory
Diagnostic trouble code (DTC)8 A
Possible cause Test step/Remedy 1)
I 00I No malfunction in memory. 2)
2 002 Open circuit - left front door actuator. 23 O 2.0
3 003 Warning buzzer - open circuit. 23 O 6.0
4 004 Warning buzzer - short circuit to ground. 23 O 6.0
5 005 Red indicator lamps - short to ground. 23 O 11.0, 16.0, 21.0
6 006 Green indicator lamps - short to ground. 23 O 12.0, 17.0, 22.0
7 007 Short to positive, lock circuit 1 23 O 8.0, 13.0, 18.0
8 008 Short to positive, lock circuit 2 23 O 8.0, 13.0, 18.0
9 009 Red indicator lamps - short to positive. 23 O 11.0, 16.0, 21.0
I0 0I0 Green indicator lamps - short to positive. 23 O 12.0, 17.0, 22.0
II 0II IRCL control module (N54). N54
I2 0I2 Immobilization output, short after circuit 30. 23O 23.0
1) Observe Preparation for Test, see 22.2) If the diagnostic trouble code “I” (no malfunction in memory) appears, but the vehicle cannot be locked or unlocked from either door or trunk lid, perform Function Test, Test steps 1 – 9 with the
second infrared transmitter. If the infrared remote control functions with the second transmitter, replace the first transmitter. If the infrared remote control does not function with the second transmitter,perform “Test” ( 23).
b Diagnostic Manual • Body and Accessories • 04/94 4.2 IRCL 12/2
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Electrical Test Program – Component Locations
P80-5182-57
Sedan
Figure 11 Infrared transmitterA26/1 Left front door IR receiverA26/2 Right front door IR receiverA26/3 Trunk lid IR receiver
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 21/6
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Electrical Test Program - Preparation for Test
Preparation for Test:1. Provide access to IRCL control module (N54) .2. Provide access to PSE control module.3. Disconnect ATA control module (N26).4. Connect socket box with test cable according to connection diagram,
see 22 Figure 1.
Electrical wiring diagramsSee Electrical Troubleshooting Manual, Model 140, Volume 2.
Special Tools
35-pin socket box
124 589 00 21 00
27-pin test cable
126 589 20 63 00
Electrical connecting set
201 589 00 99 00
Equipment
Multimeter 1) Fluke models 23, 83, 85, 87
1) Available through the MBUSA Standard Equipment Program.
b Diagnostic Manual • Body and Accessories • 04/94 4.2 IRCL 22/1
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Electrical Test Program - Preparation for Test
b Diagnostic Manual • Body and Accessories • 04/94 4.2 IRCL 22/2
4.2 Infrared Remote Central Locking (IRCL) Model 140 –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––Electrical Test Program - Preparation for Test
Wiring,3.1 PSE/RTG 23 O 1.0,3.1 PSE/CL 23 O 8.0,Closing assist supplypump (M14/3).
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/4
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
8.0 7
8
IRCL control module (N54)Left front door lock switch (S86/1)Voltage supply
27 w
N54k
c L 11 All doors closed andlocked manually withkey. 11 – 14 V
Wiring,3.1 PSE/CL 23 O 4.0,(on vehicles up to 11/93).N54.
Unlock vehicle via leftfront door with IRtransmitter and holdbutton.
<1 VGreen indicatorlamp flashes.
Wiring,O 9.0 to 12.0,N54.
27 w
N54k
c L 23 All doors closed andunlocked manually withkey.
11 – 14 V Wiring,3.1 PSE/CL 23 O 4.0,(on vehicles up to 11/93).N54.
Lock vehicle via left frontdoor with IR transmitterand hold button.
<1 VRed indicatorlamp flashes.
Wiring,O 9.0 to 12.0,N54.
9.0 Left front door IR receiver (A26/1) Voltage supply 13 w
N54k
c L 12
11 – 14 V Wiring,O 9.1,N54.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/5
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
9.1 A26/1Voltage supply 2 w
A26/1c L 3 Remove A26/1. 11 – 14 V Wiring,
N54.
10.0 Left front door IR receiver (A26/1) Infrared signal control circuit 27 w
N54k
c L 18
Lock vehicle using IRtransmitter at left front doorand keep buttondepressed.After completion of thelocking process, readvalue.Afterwards, release buttonand read second value.
Difference ofvalues betweenbuttondepressed andbutton releasedapprox.+0.3 – +0.5 V.
Wiring,A26/1.
11.0 L9
Left front door IR receiver (A26/1)Red indicator lamp
Disconnect N54 from k.
No bridge connected.Red indicatorlamp off.
Wiring,A26/1,N54.
273
N54k
uu
139
Both bridges connected. Red indicatorlamp lights.
Wiring,A26/1.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/6
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
12.0 6
I0
Left front door IR receiver (A26/1)Green indicator lamp
Disconnect N54 from k.
No bridge connected.Green indicatorlamp off.
Wiring,A26/1,N54.
2710
N54k
uu
139
Both bridges connected. Green indicatorlamp lights.
Wiring,A26/1.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/7
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
13.0 7
8
IRCL control module (N54)Right front door lock switch (S87/1)Voltage supply
27 w
N54k
c L 11 All doors closed andlocked manually withkey. 11 – 14 V
Wiring,3.1 PSE/CL 23 O 2.0,(vehicles up to 11/93 only).N54.
Unlock vehicle via rightfront door with IRtransmitter and holdbutton.
<1 VGreen indicatorlamp flashes.
Wiring,O 14.0 to 17.0,N54.
27 w
N54k
c L 23 All doors closed andunlocked manually withkey.
11 – 14 V Wiring,3.1 PSE/CL 23 O 2.0,(vehicles up to 11/93 only).N54.
Lock vehicle via right frontdoor with IR transmitterand hold button.
<1 VRed indicatorlamp flashes.
Wiring,O 14.0 to 17.0,N54.
14.0 Right front door IR receiver (A26/2) Voltage supply 13 w
N54k
c L 22
11 – 14 V Wiring,O 14.1,N54.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/8
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
14.1 A26/2Voltage supply 2 w
A26/2c L 3 Remove A26/2. 11 – 14 V Wiring,
N54.
15.0 Right front door IR receiver (A26/2) Infrared signal control circuit 27 w
N54k
c L 8
Lock vehicle using IRtransmitter at right frontdoor and keep buttondepressed.After completion of thelocking process, readvalue.Afterwards, release buttonand read second value.
Difference ofvalues betweenbuttondepressed andbutton releasedapprox.+0.3 – +0.5 V.
Wiring,A26/2.
16.0 L9
Right front door IR receiver (A26/2)Red indicator lamp
Disconnect N54 from k.
No bridge connected.Red indicatorlamp off.
Wiring,A26/2,N54.
271
N54k
uu
139
Both bridges connected. Red indicatorlamp lights.
Wiring,A26/2.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/9
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
17.0 6
I0
Right front door IR receiver (A26/2)Green indicator lamp
Disconnect N54 from k.
No bridge connected.Green indicatorlamp off.
Wiring,A26/2,N54.
272
N54k
uu
139
Both bridges connected. Green indicatorlamp lights.
Wiring,A26/2.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/10
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
18.0 7
8
IRCL control module (N54)Trunk lid lock switch (S88/2)Voltage supply
27 w
N54k
c L 11 All doors closed andlocked manually withkey. 11 – 14 V
Wiring,3.1 PSE/CL 23 O 3.0,(vehicles up to 11/93 only).N54.
Unlock vehicle via trunk lidwith IR transmitter andhold button.
<1 VGreen indicatorlamp flashes.
Wiring,O 19.0 to 22.0,N54.
27 w
N54k
c L 23 All doors closed andunlocked manually withkey.
11 – 14 V Wiring,3.1 PSE/CL 23 O 3.0,(vehicles up to 11/93 only).N54.
Lock vehicle via trunk lidwith IR transmitter andhold button.
<1 VRed indicatorlamp flashes.
Wiring,O 19.0 to 22.0,N54.
19.0 Trunk lid IR receiver (A26/3) Voltage supply 24 w
N54k
c L 5
11 – 14 V Wiring,O 19.1,N54.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/11
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
19.1 A26/3Voltage supply 2 w
A26/3c L 3 Remove A26/3. 11 – 14 V Wiring,
N54.
20.0 Trunk lid IR receiver (A26/3) Infrared signal control circuit 27 w
N54k
c L 4
Lock vehicle using IRtransmitter at trunk andkeep button depressed.After completion of thelocking process, readvalue.Afterwards, release buttonand read second value.
Difference ofvalues betweenbuttondepressed andbutton releasedapprox.+0.3 – +0.5 V.
Wiring,A26/3.
21.0 L9
Trunk lid IR receiver (A26/3)Red indicator lamp
Disconnect N54 from k.
No bridge connected.Red indicatorlamp off.
Wiring,A26/3,N54.
2721
N54k
uu
249
Both bridges connected. Red indicatorlamp lights.
Wiring,A26/2.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/12
4.2 Infrared Remote Central Locking (IRCL) Model 140
Electrical Test Program - Test
O N A Test scope Test connection Test condition Nominal value Possible cause/Remedy
22.0 6
I0
Trunk lid IR receiver (A26/3)Green indicator lamp
Disconnect N54 from k.
No bridge connected.Green indicatorlamp off.
Wiring,A26/3,N54.
272
N54k
u 139
Both bridges connected. Green indicatorlamp lights.
Wiring,A26/2.
23.0 I2 Vehicles as of 12/93 only
Immobilization output 25 w
N54k
c L 9
Unlock vehicle by pointingIR transmitter toward oneof the three IR receivers.
Open driver‘s window.Lock vehicle by pointing IRtransmitter toward one ofthe three IR receivers.Ignition: ON
11 – 14 V
< 1 V
Wiring,O 1.0, 8.0 – 22.0,N54.
24.0 Diagnosis output
27 w
N54k
c L 19 10 – 14 VWiring,N54.
b Diagnostic Manual • Body and Accessories • 09/94 4.2 IRCL 23/13
4.2 Infrared Remote Central Locking (IRCL) Model 140