Troubleshooting

Table 60
Troubleshooting Test Steps
Values Results
1. Diagnostic Codes
A. Establish communication between the electronic service
tool and the Electronic Control Module (ECM). Refer to Trou-
bleshooting, “Electronic Service Tools”, if necessary.
B. Use the electronic service tool to check for active diagnos-
tic codes.
Diagnostic
codes
Result: There are active or logged codes.
Repair: Troubleshoot any codes before continuing with this
procedure. Refer to Troubleshooting, “Diagnostic Trouble
Codes”.
Result: There are no active or logged codes.
Proceed to Test Step 2.
2. Electrical Connectors
A. Check all electrical connectors for damage. Refer to Trou-
bleshooting, “Electrical Connectors - Inspect”.
B. Make sure that all the connector seals are in place and that
the connectors have been correctly installed.
Electrical
connectors
Result: An electrical connector is damaged.
Repair: Repair the electrical connector or replace the electri-
cal connector.
Result: A connector seal is displaced or missing or an electri-
cal connector is not correctly installed.
Repair: Repair the electrical connector or replace the electri-
cal connector.
Result: All electrical connectors are OK.
Proceed to Test Step 3.
3. ECM Connection
A. Check that the P2/J2 and P1/J1 connectors are correctly
installed.
Note: If a fault is suspected with the ECM power or ground
connections, refer to Troubleshooting, “Electrical Power Sup-
ply - Test”.
ECM connection Result: An ECM connector is not correctly installed.
Repair: Repair the electrical connector or replace the electri-
cal connector.
Result: Both ECM connectors are correctly installed.
Proceed to Test Step 4.
(continued)
UENR0612-07 121
Symptom Troubleshooting
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