LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Jeep >> 2007 >> Commander Base, 4.7 P, AWD >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Anti-Lock Brake System - Electrical Diagnostics >> Abs - Electrical Diagnostics >> DTC Troubleshooting >> U1503-Implausible Message Data Length Received From FCM >> Diagnostic Test
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Test

  1. 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 

    1. Refer to DIAGNOSIS AND TESTING and diagnose the appropriate symptom.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Replace the Anti-Lock Brakes Module in accordance with the Service Information.
    2. Perform ABS VERIFICATION TEST .
scientia non olet · About LEMON Manuals