U0402-IMPLAUSIBLE DATA RECEIVED FROM TCM
For a complete wiring diagram Refer to Section 8W
- 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 (TCM).
| Possible Causes |
| TIPM CAN BUS DTCS |
| TRANSMISSION DTCS |
| ANTI-LOCK BRAKE MODULE |
Diagnostic Test
1. CHECK IF TIPM CAN BUS DTCS ARE PRESENTWith the scan tool, read TIPM DTCs.
Are there any TIPM CAN BUS DTCs present?
Yes
- Refer to 8-ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING and diagnose the appropriate symptom.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
- Go To 2
2. CHECK IF TRANSMISSION DTCS ARE PRESENT
With the scan tool, read Transmission DTCs.
Are there any Transmission DTCs present?
Yes
- Refer to the 21 - TRANSMISSION ELECTRICAL DIAGNOSTICS and diagnose the appropriate symptom.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).
No
- Using the schematics as a guide, check 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 per the Service Information.
- Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).