U1503
U1503-IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM FCM (TIPM)
For a complete wiring diagram Refer to the Wiring Information.
- When Monitored:
Continuously with the ignition on.
- Set Condition:
When the Anti-Lock Brake Module detects an incorrect CAN message from the Totally Integrated Control Module (TIPM).
CHECK IF TIPM CAN BUS DTCs ARE PRESENT
1. With the scan tool, read TIPM DTCs.
Are there any TIPM CAN BUS DTCs present?
Yes
- Refer to TIPM diagnostics Testing and Inspection.
No
- Replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST ABS Verification Test.