Diagnostic Test
- CHECK THE TIPM OR BCM FOR DTCS
- With the scan tool, check for TIPM or BCM DTCs.
Does the TIPM or BCM report the DTC U0001-CAN C BUS DTC or U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE?
Yes
- Refer to the appropriate Diagnostic information and perform the diagnostic procedure for U0001-CAN C BUS DTC first if it is present.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Refer to NAG1 TRANSMISSION VERIFICATION TEST .
No
- Go To 2
- With the scan tool, check for TIPM or BCM DTCs.
- CHECK FOR ABS DTCS
- With the scan tool, check for ABS DTCs.
Are there any ABS DTCs present?
Yes
- Refer to DIAGNOSTIC CODE INDEX and perform the appropriate symptom.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Refer to NAG1 TRANSMISSION VERIFICATION TEST .
No
- Using the schematics as a guide, check the Transmission Control Module (TCM) 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 and program the TCM in accordance with the Service Information. Refer to MODULE, TRANSMISSION CONTROL (TCM), REMOVAL .
- Perform NAG1 TRANSMISSION VERIFICATION TEST. Refer to NAG1 TRANSMISSION VERIFICATION TEST .
- With the scan tool, check for ABS DTCs.