Troubleshooting

Table 76
Troubleshooting Test Steps
Values Results
1. Check for Diagnostic Codes That Are Related to this
Procedure
A. Connect the electronic service tool to the diagnostic
connector.
B. Turn the keyswitch to the ON position.
C. Check for any active diagnostic codes that are listed in Ta-
ble 75 .
D. Make a note of the active diagnostic codes.
Diagnostic
codes
Result: A 630-2 diagnostic code is active.
Proceed to Test Step 2.
Result: An XXX-20 or XXX-21 diagnostic code is active.
Proceed to Test Step 4.
2. Enter the Injector Codes Using the Electronic Service
Tool
A. Connect the electronic service tool to the diagnostic con-
nector. Refer to Troubleshooting, “Electronic Service Tools”.
B. Turn the keyswitch to the ON position.
C. Manually enter the injector codes using the electronic serv-
ice tool. Refer to Troubleshooting, “Injector Code - Calibrate”.
D. Use the electronic service tool to clear all active diagnostic
codes.
E. Start the engine.
F. Use the electronic service tool to check for active diagnos-
tic codes.
G. Turn the keyswitch to the OFF position.
Diagnostic
codes
Result: The 630-2 diagnostic code is no longer active.
Return the engine to service.
Result: The 630-2 diagnostic code is still active.
Proceed to Test Step 3.
3. Re-Flash the ECM
A. Reflash the ECM. Refer to Troubleshooting, “ECM Soft-
ware - Install”.
B. Ensure that all of the injector codes are programmed. Re-
fer to Troubleshooting, “Injector Code - Calibrate”.
C. Use the electronic service tool to clear all active diagnostic
codes.
D. Start the engine.
E. Use the electronic service tool to check for active diagnos-
tic codes.
Diagnostic
codes
Result:The 630-2 diagnostic code is no longer active.
Return the engine to service.
Result: The 630-2 diagnostic code is still active
Proceed to Test Step 7.
(continued)
UENR0612-07 151
Circuit Tests
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