Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK FOR FCM CAN BUS DTCS
With the scan tool, read FCM DTCs.

Are there any FCM CAN BUS DTCs present?

Yes
1. Refer to ELECTRICAL - ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS and perform the appropriate test(s).
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go To step 2).
2) CHECK IF HVAC DTC'S ARE PRESENT
With the scan tool, read HVAC DTCs.

Are there any HVAC DTCs present?

Yes
1. Refer to HVAC - ELECTRICAL DIAGNOSTICS and perform the appropriate test(s).
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. 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 per the Service Information. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE - DESCRIPTION)
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .