ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1337

DTC Code DTC Name
C1337 Diameter of the Tire is not Uniform

DESCRIPTION

The skid control ECU (brake actuator assembly) measures the speed of each wheel by receiving signals from the speed sensors.

These signals are used for recognizing whether all 4 wheels are operating properly.

Therefore, all wheel signals must be equal.

DTC No. DTC Detection Condition Trouble Area
C1337 When the solenoid is not being driven, the vehicle is accelerated from a stop to a vehicle speed of more than 20 km/h (12 mph), and the average speed of the front wheels and the rear wheels differs by more than 25% for 20 seconds continuously, and this occurs 3 times.

  • Tire size

  • Front skid control rotor RH/LH

  • Rear skid control rotor RH/LH

  • Brake actuator assembly

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK TIRE SIZE


    1. Check tire size and condition of all 4 wheels.

      OK
      Condition of all 4 wheels is normal and tire size is same.

    NG

    REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME IN SIZE

    OK

  2. INSPECT FRONT SKID CONTROL ROTOR


    1. Remove the front skid control rotor.

    2. Check the front skid control rotor.

      OK
      No scratches, oil, or foreign matter on the rotors.

    3. Reinstall the front skid control rotor.


    NG

    CLEAN OR REPLACE FRONT SKID CONTROL ROTOR

    OK

  3. INSPECT REAR SKID CONTROL ROTOR


    1. Remove the rear skid control rotor Click here.

    2. Check the rear skid control rotor.

      OK
      No scratches, oil, or foreign matter on the rotors.

    3. Reinstall the rear skid control rotor.


    NG

    CLEAN OR REPLACE REAR SKID CONTROL ROTOR Click here

    OK

  4. RECONFIRM DTC


    1. Clear the DTC Click here.

    2. Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.

    3. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output B

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here