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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Anti-Lock Brake System - Electrical Diagnostics) >> Abs Electrical Diagnostics >> DTC Troubleshooting >> U1501-Implausible Message Data Length Received From ECM/Pcm >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. 1)  VERIFY DTC IS ACTIVE 

    Turn the ignition on.

    With the scan tool, read and record ABS DTCs.

    With the scan tool, read and record Environmental Data (EV Data).

    With the scan tool, erase ABS DTCs.

    Cycle the ignition switch.

    With the scan tool, read ABS DTCs.

    Does this DTC reset? 

    Yes 

    1. Go To  2).

    No 

    1. Using the schematics as a guide, check the Anti-Lock Brakes Module and the ECM or PCM pins, terminals, and connectors for corrosion, damage, and terminal push out. Pay particular attention to all Communication circuits.
    2. Perform ABS VERIFICATION TEST - VER 1 .
  2. 2)  CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs 

    With the scan tool, read all active DTCs from all CAN C Bus modules.

    NOTE: Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

    Does the scan tool display any active DTCs related to the conditions listed above? 

    Yes 

    1. Diagnose and repair the DTC(s). Refer to appropriate ELECTRICAL DIAGNOSTICS article.

    No 

    1. Go To  3).
  3. 3)  CHECK IF ECM OR PCM DTCs ARE PRESENT 

    With the scan tool, read ECM or PCM DTCs.

    Are any DTCs present? 

    Yes 

    1. Diagnose and repair the DTC(s). Refer to appropriate ENGINE ELECTRICAL DIAGNOSTICS article.
    2. Perform ABS VERIFICATION TEST - VER 1 .

    No 

    1. Go To  4).
  4. 4)  CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs 

    With the scan tool, select Network View and select Advanced.

    Is there more than one module with active DTCs "Logged Against" the ECM or PCM? 

    Yes 

    1. Replace/update the ECM or PCM in accordance with the service information.
    2. Perform POWERTRAIN VERIFICATION TEST for gas engines.
    3. Perform ABS VERIFICATION TEST - VER 1 .

    No 

    1. Using the schematics as a guide, check the Anti-Lock Brakes Module pins, terminals, and connectors for corrosion, damage, and terminal push out. Pay particular attention to all Communication circuits. If no problems are found, replace the Anti-Lock Brakes Module in accordance with the Service Information.
    2. Perform ABS VERIFICATION TEST - VER 1 .
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