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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 331 ((Transmission Control Module (TCM) - Electrical Diagnostics - Nag1 Automatic Transmission)) >> DTC Troubleshooting >> U0431-Implausible Data From FCM/TIPM >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR TIPM/FCM CAN BUS DTCS 
    1. With the scan tool, read TIPM/FCM DTCs.

      Are there any TIPM/FCM CAN BUS DTCS present?

      Yes 

      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.
      • Perform the NAG1 TRANSMISSION VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Transmission Control (TCM) - Standard Procedure .