Diagnostic Test
WARNING: This page is about a different car, the 2012 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 INDEX and COMMUNICATION - NON-DTC BASED DIAGNOSTICS for diagnostic procedures and other possible causes.
- Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
No
- Go To 2.
- With the scan tool, read FCM DTCs.
- CHECK IF ABS DTCS ARE PRESENT
- With the scan tool, read ABS DTCs.
Are there any ABS DTCs present?
Yes
- Refer to 3.7L - DIAGNOSTIC CODE INDEX and perform the appropriate symptom.
- Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
No
- Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the TCM in accordance with the Service Information.
- Refer to STANDARD PROCEDURE and perform the NAG1 TRANSMISSION VERIFICATION TEST.
- With the scan tool, read ABS DTCs.