Diagnostic Test
CHECK FOR BCM CAN BUS DTCS
- With the scan tool, read BCM DTCs.
Are any BCM CAN BUS DTCs present?
Yes
- Refer to DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure. Perform the diagnostic procedure for DTC U0001-CAN C BUS first if the fault is present. Refer to U0001-00-CAN C BUS .
- Perform the TRANSMISSION VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
NOTE:If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.
- Using the schematics as a guide, check the Transmission Control Module (TCM) terminals and connectors for corrosion, damage or pushed out terminals. Pay particular attention to the power and ground circuits. If no problems are found, replace the TCM and perform programming and PROXI Configuration Alignment procedures. Refer to MODULE, TRANSMISSION CONTROL, REMOVAL .
- Perform the Transmission Verification Test. Refer to STANDARD PROCEDURE .