Table 71
Troubleshooting Test Steps
Values Results
1. Active Codes and Logged Codes
A. Establish communication between the electronic service tool
and the Electronic Control Module (ECM). Refer to Troubleshoot-
ing, “Electronic Service Tools”, if necessary.
Codes Result: There are active codes.
Repair: Troubleshoot any active codes before continuing
with this procedure.
Result: There are no active codes.
Proceed to Test Step 2.
2. Electrical Connections
A. Check for the correct installation of the ECM J1/P1 and the J2/
P2 connectors. Check for correct installation of the fuel injector
connectors.
Connectors Result: There are suspect connectors.
Repair: Repair connectors that are suspect or replace con-
nectors that are suspect.
Perform the “Wiggle Test” on the electronic service tool.
Result: There are no suspect connectors.
Proceed to Test Step 3.
3. Fuel Injection
A. Perform the “Fuel System Verification Test” in the “Diagnostic
Tests” under the “Diagnostics” menu.
Fuel system
verification
test
Result: The test was successful.
Proceed to Test Step 4.
Result: The test was not successful.
Repair: Diagnose and repair the fault.
Reset all active codes and clear all logged codes.
Verify that the repair eliminated the fault.
4. Fuel Quality
A. Refer to Operation and Maintenance Manual for information on
the correct characteristics of the fuel for the engine. If necessary,
obtain a fuel analysis to confirm that the correct fuel is being used
for the engine. Refer to Systems Operation, Testing, and Adjust-
ing, “Fuel Quality - Test” for the correct procedure.
Fuel Result: The fuel quality is OK.
Proceed to Test Step 5.
Result: The fuel quality is not OK.
Repair: Replace the fuel. Verify that the repair eliminated
the fault.
(continued)
UENR4469-36 145
Symptom Troubleshooting
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