Dtc C1337 Diameter Of The Tire Is Not Uniform

Brake. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Brake Control Dynamic Control Systems. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK TIRE SIZE

RECONFIRM DTC

DTC 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 indicate the same speed.

DTC Code
DTC Detection Condition
Trouble Area
C1337
Either condition is met:
  1. The diameter of the 2 front wheels is different from the diameter of the 2 rear wheels.
  2. A wheel speed sensor is faulty.
  1. Tire and wheel size
  2. Tire deformation
  3. Skid control rotor
  4. Speed sensor
  5. Speed sensor circuit
  6. Skid control ECU (Brake actuator assembly)

INSPECTION PROCEDURE

NOTICE:
After replacing the brake actuator assembly, perform calibration (HILUX_TGN26 RM000000XHR073X.html).
1.CHECK FOR DTC

  1. Check if any DTCs relating to the speed sensor circuit are output (HILUX_TGN26 RM000000XHU08RX.html).

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



B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS (HILUX_TGN26 RM000000XHU08RX.html)
A


2.CHECK TIRE SIZE

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

    OK:
    All 4 tires are the same size and in the same condition.


NG
REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME SIZE AND IN THE SAME CONDITION
OK


3.RECONFIRM DTC

  1. Clear the DTC (HILUX_TGN26 RM000000XHV0CGX.html).

  1. Turn the ignition switch off.

  1. Start the engine.

  1. Drive the vehicle at a speed of 30 km/h (18 mph) or more for at least 30 seconds.

  1. Check if the same DTC is output.

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



B
USE SIMULATION METHOD TO CHECK (HILUX_TGN26 RM000004QR7002X.html)
A

REPLACE BRAKE ACTUATOR ASSEMBLY (HILUX_TGN26 RM0000010K000WX.html)