U0431 Implausible data from FCM (TIPM)

U0431 code - The messages sent on the Can bus are distinguished by an identifier (ID). Can ID is defined to contain acertain number of bytes. The transmission control module (TCM) verifies that it has received the proper number of bytes for each ID.

When monitored this DTC continuously with the ignition on, one valid Can ID received at least once, and no U0002 Can bus off performance DTC present. Set condition when the TCM detects an incorrect Can Id from the TIPM.

Possible causes U0431 code: 

- TIPM Can Bus DTCs present

- Transmission Control Module

Diagnostic test U0431 code

Check for TIPM Can Bus DTCs

With the scan tool, read TIPM DTCs.

Are there any TIPM Can Bus DTCs present ?

Yes, refer to totally integrated power (TIPM) diagnosis and testing and perform the appropriate diagnostic procedure. Perform 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. Perform NAG1 Transmission Verification Test.

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