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VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1337

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

The skid control ECU (master cylinder solenoid) 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
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INSPECTION PROCEDURE

Note:

After replacing the master cylinder solenoid, perform zero point calibration and store the system information (Click here).

Tip:

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).

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PROCEDURE


  1. Click here

    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.

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    RECONFIRM DTC


    1. Clear the DTCs (Click here).

    2. Turn the ignition switch off.

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

    4. Check if the same DTCs are output (Click here).

      Tip:

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

      Table 1. Result
      Result Proceed to
      DTC is not output A
      DTC is output (for LHD) B
      DTC is output (for RHD) C

  3. Click here

    REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME SIZE

  4. Click here

    CHECK FOR INTERMITTENT PROBLEMSClick here

  5. Click here

    REPLACE MASTER CYLINDER SOLENOIDClick here

  6. Click here

    REPLACE MASTER CYLINDER SOLENOIDClick here