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 ENGINE DTC PRESENT
With the scan tool, check engine DTCs.

Are there any engine DTCs present?

Yes
1. Refer to the ENGINE ELECTRICAL DIAGNOSTICS and diagnose the appropriate symptom.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
No
1. Go To step 2).
2) CHECK FOR CAN BUS DTCS
With the scan tool, check for any CAN bus DTCs or a sign of a CAN bus failure.

Are there any CAN bus DTCs present in any module other than the TCM or an overall indication of a CAN bus communication problem?

Yes
1. This is an indication of a CAN bus communication problem. Depending on the DTC, either refer to the module reporting the DTC and perform diagnostics for the appropriate symptom or 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 3).
3) CHECK IF DTC RESETS
Turn the ignition off to the lock position.

Replace and program the Powertrain Control Module per the Service Information. Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/POWERTRAIN CONTROL MODULE for the appropriate service procedure.

With the scan tool, record the Environmental Data and erase Transmission DTCs.

NOTE: If the TCM detects and stores a DTC, the TCM also stores the vehicles operating conditions under which the DTC originally set and is located in scan tool under Environmental Data. Before erasing any stored DTCs, record any available data to assist in duplicating the conditions in which the DTC originally set.

Using the Environmental Data recorded earlier, test drive the vehicle while trying to duplicate the conditions in which the DTC originally set.

With the scan tool, read Transmission DTCs.

Did the DTC P2638-TORQUE MANAGEMENT FEEDBACK SIGNAL PERFORMANCE reset?

Yes
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 .
No
1. Test Complete.
2. Perform NAG1 TRANSMISSION VERIFICATION TEST .