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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 456 (Antilock Brake System (Abs) - Electrical Diagnostics) >> DTC Troubleshooting >> U1502-Implausible Message Data Length Received From TCM >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.
  1. VERIFY DTC IS ACTIVE 
    1. Turn the ignition on.
    2. With the scan tool, read and record ABS DTCs.
    3. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
    4. With the scan tool, erase ABS DTCs.
    5. Cycle the ignition switch.
    6. With the scan tool, read ABS DTCs.

      Does this DTC reset?

      Yes 

      • Go To  2

      No 

      • The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
      • Perform the ABS INTERMITTENT CONDITION TEST. Refer to STANDARD PROCEDURE .
  2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs 
    1. 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 

      No 

      • Go To  3
  3. CHECK IF TRANSMISSION RELATED DTCs ARE PRESENT 
    1. With the scan tool, read TCM DTCs.

      Are any Transmission related DTCs present?

      Yes 

      • Diagnose and repair the DTCs. Refer to the appropriate Testing & Diagnostics article .

      No 

      • Using the schematics as a guide, check the Anti-Lock Brake 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 Brake Module in accordance with the Service Information.
      • Perform ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .