2 SPN 4765/FMI 0 - GHG14
This diagnostic is typically Exhaust Temperature High.
Table 1.SPN 4765/FMI 0
Description Exhaust temperature high
Monitored Parameter Exhaust temperature
Typical Enabling Conditions Always on
Monitor Sequence None
Execution Frequency Continuous when enabling conditions met
Typical Duration 2 Seconds
Dash Lamps CEL
Engine Reaction Derate 25%
1. Shut off the engine, apply the parking brake, chock the
wheels, and perform any other applicable safety steps.2. Connect
DDDL /DDRS 7.08 SP2.3. Turn the ignition ON (key ON, engine OFF).4.
Check for multiple fault codes.
a. If codes other than SPN 4765/FMI 0 are active, troubleshoot
those first.b. If only SPN 4765/FMI 0 and related codes are
present, Go to step 5.
5. Monitor the DOC outlet temperature.a. If the temperature is
greater than 760C (1400F), Go to step 8.b. If the temperature is
less than 760C (1400F), Go to step 6.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area.Engine exhaust is toxic.
6. With DDDL 7.08 SP2 connected, run the engine at 1200 rpm for
10 minutes.7. Monitor the Diesel Oxidation Catalyst (DOC) inlet
temperature and the DOC outlet temperature. Are the
temperatures
within 25C (45F) of each other?a. If yes; Go to step 10.b. If
no; Go to step 8.
8. Turn the ignition OFF.9. Disconnect the DOC outlet
temperature sensor and inspect the connector for damaged, bent,
spread, or corroded pins. If
the temperature sensor connector is OK, check the connections
upstream of the Aftertreatment Control Module(ACM2.1): the
Aftertreatment Device (ATD) harness 14-pin connector pin 3, the VIH
47-pin connector pin 7, and theACM2.1 120-pin connector pin 27.
a. If harness damage is found, repair as necessary.b. If no
harness damage is found, replace the DOC outlet temperature sensor.
Refer to section "Removal of the
GHG14 Diesel Oxidation Catalyst Outlet Temperature Sensor"10.
Perform an idle speed balance test using DDDL 7.08 SP2. Retain the
log file. Refer to section "Checking the Idle Speed
Balance"11. Was a faulty fuel injector/cylinder identified?
a. If yes, repair the faulty fuel injector/cylinder, and repeat
the idle speed balance test to verify the repair. Go to step21.
b. If no; Go to step 12.12. Remove the ATD. Refer to to the
EPA07/10/GHG14 Exhaust - EGR - ATS Manual (DDC-SVC-MAN-0083) to
find
the appropriate ATS removal instructions for the vehicle being
serviced.
2 SPN 4765/FMI 0 - GHG14
4 All information subject to change without notice.Copyright
2012 DETROIT DIESEL CORPORATION 4 58-12
13. Disassemble the ATD and inspect the inlet face of the DPF
substrate for contamination.a. If coolant contamination is found
(white residue on inlet face of the DPF and a sweet smell from
exhaust), Go to
step 14.
b. If oil contamination is found (oil residue or paste on DPF
Inlet face or an oil lacquer on the inlet flange), Go tostep
17.
c. If fuel contamination is found (inlet flange washed clean),
Go to step 19.d. If no contamination is found, obtain pictures of
the inlet flange, the DOC outlet face, and the DPF inlet and
outlet
faces. Contact the Detroit Customer Support Center at
800-445-1980 with these pictures and the log files fromthe idle
speed balance test.
14. Question the operator about coolant usage.15. Visually
inspect the coolant reservoir for low level. Possible causes for
coolant contamination in ATD.16. Repair the cause of coolant entry
as necessary and Go to step 20.17. Question the operator about
excessive oil consumption. Possible causes of excessive oil
consumption are:
Excessive idle time Defective turbine wheel seal Turbocharger
bearing failure Worn exhaust valve seals Defective crankcase
breather system Stuck rings
18. Repair the cause of oil contamination and Go to step 20.19.
Repair the cause of fuel contamination and Go to step 20.20.
Install the ATD. Refer to the EPA07/10/GHG14 Exhaust - EGR - ATS
Manual (DDC-SVC-MAN-0083) to find the
appropriate ATS installation instructions for the vehicle being
serviced.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the
engine in a well-ventilated area.Engine exhaust is toxic.
WARNING: HOT EXHAUST
During parked regeneration the exhaust gases will be extremely
HOT and could cause a fire ifdirected at combustible materials. The
vehicle must be parked outside.
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All information subject to change without notice. 54 58-12
Copyright 2012 DETROIT DIESEL CORPORATION
NOTE: The parked regeneration is successful if the DOC outlet
temperature is within 100C (212F) of the DOCModel Delay.
21. Perform a parked regeneration and e-mail all log files from
this troubleshooting procedure to the Detroit CustomerSupport
Center. Verify repairs.Refer to section "Performing a Parked
Regeneration Using DDDL"Refer to section "Resetting the
EPA07/10/GHG14 Diesel Particulate Filter Ash Accumulators"
a. If the regeneration is successful, Release Vehicleb. If the
regeneration is not successful, repeat from step 12. If no solution
is found, contact the Detroit Customer
Support Center at 800-445-1980 with these pictures and the log
files from the idle speed balance test.
2 SPN 4765/FMI 0 - GHG14
6 All information subject to change without notice.Copyright
2012 DETROIT DIESEL CORPORATION 4 58-12
1 4 58-122 SPN 4765/FMI 0 - GHG14