Diagnostic Test
WARNING: This page is about a different car, the 2009 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR FCM CAN BUS DTCS
- With the scan tool, read FCM DTCs.
Are there any FCM CAN BUS DTCs present?
Yes
- Refer to DTC Based Diagnostics and perform the appropriate diagnostic procedure.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
No
- Go to step 2
- With the scan tool, read FCM DTCs.
- ELECTRONIC SHIFT MODULE DTCS PRESENT
- With the scan tool, read Final Drive Control Module (FDCM) DTCs.
Are there any FDCM DTCs present?
Yes
- Refer to DTC Based Diagnostics and perform the appropriate diagnostic procedure.
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.
- Perform NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .
- With the scan tool, read Final Drive Control Module (FDCM) DTCs.