VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster), Diagnostic DTC:C1337

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

DESCRIPTION

The skid control ECU measures the speed of each wheel by receiving signals from the speed sensor. These signals are used for recognizing that all 4 wheels are operating properly. Therefore, all wheel signals must be equal.

DTC Code DTC Detection Condition Trouble Area
C1337

Either condition is met:


  • The diameter of the 2 front wheels and 2 rear wheels is different.

  • There is a wheel speed sensor fault.

  • Speed sensor

  • Speed sensor rotor

  • Speed sensor circuit

  • Tire size

INSPECTION PROCEDURE

Note

When replacing the master cylinder solenoid, perform calibration Click here.

Tech Tips

When DTCs C1401 to C1416 are output with DTC C1337, inspect and repair the trouble areas indicated by DTCs C1401 to C1416 first Click here.

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 SIZE

    OK

  2. RECONFIRM DTC


    1. Clear the DTCs 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 DTCs are output Click here.

      Tech Tips

      Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC is output (for LHD) B
      DTC is output (for RHD) C

    B

    REPLACE MASTER CYLINDER SOLENOID Click here

    C

    REPLACE MASTER CYLINDER SOLENOID Click here

    A

    USE SIMULATION METHOD TO CHECK Click here