Table 58
Troubleshooting Test Steps
Values Results
1. Check for Diagnostic Trouble Codes
A. Turn the keyswitch to the ON position. Do not start the engine.
B. Connect to the electronic service tool.
C. Check for associated diagnostic trouble codes.
Diagnostic trou-
ble codes
Result: A 4765-17 code is active or recently logged.
Proceed to Test Step 2.
Result: An associated code other than 4765-17 is active
or recently logged.
Repair: Troubleshoot the logged or active code. Refer to
Troubleshooting, “Diagnostic Trouble Codes”.
Result: No codes are active or recently logged.
Proceed to Test Step 3.
2. Check the Exhaust System
A. Check the exhaust system for gas leaks between the Exhaust
Back Pressure Regulator (EBPR) and the Clean Emissions Mod-
ule (CEM).
B. Check for missing or damaged exhaust system insulation.
C. Make sure that the exhaust piping between the EBPR and the
CEM is no longer than 1.83 m (6 ft).
Exhaust System Result: The exhaust system has a gas leak.
Repair: Make the necessary repairs.
Proceed to Test Step 3.
Result: The exhaust system insulation is damaged or
missing.
Repair: Make the necessary repairs.
Proceed to Test Step 3.
Result: The exhaust piping between the EBPR and the
CEM is longer than 1.83 m (6 ft).
Repair: Review and correct the routing of the exhaust
system. If necessary, contact the Dealer Solutions Net-
work (DSN) for further advice.
Proceed to Test Step 3.
3. Check the Exhaust System Temperature
A. Connect to the electronic service tool.
B. Run the engine.
C. For engines with a DPF, perform the “Manual Hydrocarbon
Dosing Capability Test” .
For engines without a DPF, perform the “Aftertreatment Regenera-
tion System Test” .
Test Result: The test completed successfully.
Return the unit to service.
Result: The test failed. Associated diagnostic trouble co-
des are active.
Repair: Troubleshoot the logged or active code. Refer to
Troubleshooting, “Diagnostic Trouble Codes”.
Result: The test failed. An error code is generated by the
electronic service tool.
Repair: Troubleshoot the error code. Refer to Trouble-
shooting, “Service Tool Error Identifiers”.
Result: The test failed. No associated diagnostic trouble
codes are active.
Contact the Dealer Solutions Network (DSN).
UENR4469-36 123
Symptom Troubleshooting
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