Diagnostic Test
- VERIFY THE DTC IS ACTIVE NOTE:
This DTC must be active for the results of this test to be valid.
- Turn the ignition on.
- With the scan tool, record and erase DTCs.
- Cycle the ignition switch from off to on.
- With the scan tool, read DTCs.
Is the DTC active at this time?
Yes
- Go To 2
No
- Test complete. The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- CHECK FOR BCM DTCS
- With the scan tool, read BCM DTCs.
Are there any BCM DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX .
No
- Go To 3
- With the scan tool, read BCM DTCs.
- CHECK FOR PCM DTCS
- With the scan tool, read PCM DTCs.
Are there any PCM DTCs present?
Yes
- Perform the appropriate diagnostic procedure. Refer to DTC INDEX .
No
- Using the schematics as a guide, check the Drive Train Control Module (DTCM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Drive Train Control Module (DTCM) in accordance with the Service Information. Refer to MODULE, DRIVETRAIN CONTROL, REMOVAL .
- Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- With the scan tool, read PCM DTCs.