U140C Implausible right rear wheel speed signal

U140C code - The messages sent on the CAN bus are distinguished by an indentifier (ID). Each Can ID is defined to contain a certain 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 the ABS control module.

Possible causes U140C code:

- TIPM can bus DTCs present

- ABS control module DTCs present

- Transmission control module

Diagnostic test U140C code

Step 1. 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 for diagnostic procedures and other possible causes.Perform NAG1 Transmission Verification Test.

No, go to step 2.

Step 2. Check if ABS DTCs are present 

With the scan tool, ABS DTCs.

Are there any ABS DTCs present ?

Yes, refer to antilock brake mlodule (ABS) diagnosis and testing and perform the diagnostics for the DTCs in the ABS module. 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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