Diagnostic Test
- CHECK IF BCM CAN BUS DTC'S ARE PRESENT
- With the scan tool, read BCM DTCs.
Are there any BCM CAN BUS DTC's present?
Yes
- Perform the appropriate diagnostic procedure. Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX .
No
- Go To 2
- With the scan tool, read BCM DTCs.
- CHECK IF ENGINE DTC'S ARE PRESENT
- With the scan tool, read Engine DTCs.
Are there any Engine DTC's present?
Yes
- Perform the appropriate diagnostic procedure. Refer to DTC INDEX .
No
- Using the schematics as a guide, check the 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 Service Information. Refer to MODULE, DRIVETRAIN CONTROL, REMOVAL .
- Perform the DTCM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- With the scan tool, read Engine DTCs.