U0402 - Implausible Data Received From Transmission Control Module
For a complete wiring diagram, refer to appropriate Wiring Diagram.
- >>When Monitored:<< Continuously with the ignition ON, one valid CAN message received at least once, and no U0002-CAN C Bus off Performance DTC present.
- >>Set Condition:<< When the anti lock brake module detects an incorrect CAN message from the transmission control module.
| Possible Causes |
|---|
| TIPM CAN BUS DTCs |
| TRANSMISSION DTCs |
| ANTI LOCK BRAKE MODULE |
Test Step 1 - Test if TIPM Can Bus DTCs are Present
- With the scan tool, read TIPM DTCs.
Are there any TIPM CAN Bus DTCs present?
Yes
- Refer to Totally Integrated Power Module - Diagnosis and Testing, refer to DIAGNOSIS AND TESTING .
No
- Go to Test Step 2
Test Step 2 - Test if Transmission DTCs are Present
- With the scan tool, read Transmission DTCs.
Are there any Transmission DTCs present?
Yes
- Refer to the Transmission Electrical Diagnostics. Refer to TRANSMISSION DTC BASED DIAGNOSTICS (P0122 TO U0141) .
No
- Using the schematics as a guide, test the anti lock brake module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the anti lock brake module.
- Perform ABS Verification Test. Refer to ABS VERIFICATION TEST (2009 - 2011) or ABS VERIFICATION TEST (2012 & UP) .