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. Computers and Control Systems
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