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SUBJECT DATE

SPN 4765/FMI 0 - GHG14 October 2012

Additions, Revisions, or Updates

Publication Number / Title Platform Section Title Change

DDC-SVC-MAN-0084 DD PlatformSPN 4765/FMI 0 -

GHG14New section

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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.

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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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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.

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