Troubleshooting

Table 104
Troubleshooting Test Steps
Values Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Inspect the connectors for the speed/timing sensors. Refer
to Troubleshooting, “Electrical Connectors - Inspect”.
C. Perform a 30 N (6.7 lb) pull test on each of the wires in the
suspect sensor connector and the sensor connections at the
ECM.
D. Check that the ground connection on the ECM and the
negative terminal on the battery are correctly installed.
E. Check the ground connection on the ECM for abrasions
and pinch points.
F. Check the harness for abrasion and pinch points from the
suspect sensor to the ECM.
G. Check that the suspect sensor is installed correctly. Check
that the suspect sensor is fully seated into the engine. Check
that the sensor is securely latched.
Damaged wire
or connector
Result: A damaged wire or damaged connector was found.
Repair the damaged wire or the damaged connector.
Use the electronic service tool to clear all logged diagnostic co-
des. Verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly con-
nected and/or inserted and the harness is free of corrosion, of
abrasion or of pinch points.
Proceed to Test Step 2.
2. Check for Active Diagnostic Codes and Recently
Logged Diagnostic Codes
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic
connector.
C. Turn the keyswitch to the ON position. If the engine will
start, then run the engine.
D. Use the electronic service tool in order to monitor active di-
agnostic codes or recently logged diagnostic codes.
Diagnostic
codes
Result: Diagnostic code 190-8 is active or recently logged.
Proceed to Test Step 3.
Result: Diagnostic code 723-8 is active or recently logged.
Proceed to Test Step 5.
Result: Diagnostic code 637-11 is active or recently logged.
Proceed to Test Step 8.
(continued)
228 UENR0612-07
Circuit Tests
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