Diagnostic procedure

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DIAGNOSTIC PROCEDURE CHART

STEP	INSPECTION	RESULTS	ACTION
1	VERIFY PCM DTC Retrieve any DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .) Are there any DTCs displayed?	Yes	Go to the appropriate DTC inspection. (See DTC TABLE .)
No	Inspect the instrument cluster operation. (See INSTRUMENT CLUSTER INSPECTION .)
2	Verify test results. If normal, return to diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX .) If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If vehicle is repaired, troubleshooting completed. If vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.

STEP

INSPECTION

RESULTS

ACTION

VERIFY PCM DTC

Yes

Go to the appropriate DTC inspection. (See DTC TABLE .)

Inspect the instrument cluster operation. (See INSTRUMENT CLUSTER INSPECTION .)

If normal, return to diagnostic index to service any additional symptoms. (See SYMPTOM DIAGNOSTIC INDEX .)
If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.

If vehicle is repaired, troubleshooting completed.
If vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.