Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) CHECK IF TCM IS FLASHABLE
NOTE: Controller is programmed with generic software and will not allow the correct vehicle Powertrain management.

With the scan tool, record the vehicles controller part number.

Select Use Controller Part Number under the Flash Tab.

Flash the controller with the correct software.

Were you able to update (flash) the controller successfully?

Yes
1. Test Complete.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1 .
No
1. Replace the TCM per the Service Information. Refer to ELECTRONIC CONTROL MODULES - SERVICE INFORMATION for the appropriate service procedures.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1 .