U1501

U1501-IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM PCM

When Monitored
Continuously with the ignition on.

Set Condition
When the Anti-Lock Brake Module detects an incorrect CAN message from the Engine Control Module (ECM).

Possible Causes
- FCM CAN BUS DTCS
- ENGINE DTCS
- ANTI-LOCK BRAKE MODULE

Diagnostic Test
1. CHECK IF FCM CAN BUS DTCs ARE PRESENT
With the scan tool, read FCM DTCs.
Are there any FCM CAN BUS DTCs present?
Yes >> Refer to Body Control Systems and diagnose the appropriate symptom.
Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test
No >> Go To 2.
2. CHECK IF ENGINE DTCs ARE PRESENT
With the scan tool, read Engine DTCs.
Are there any Engine DTCs present?
Yes >> Refer to Computers and Control Systems and diagnose the appropriate symptom. Testing and Inspection
Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test
No >> Replace the Anti-Lock Brakes Module.
Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test