Dtc C1337 Diameter Of The Tire Is Not Uniform


DESCRIPTION

INSPECTION PROCEDURE

CHECK TIRES

RECONFIRM DTC

DTC 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 sensors.
These signals are used for recognizing that all 4 wheels are operating properly.
Therefore, all wheel signals must indicate the same speed.

DTC Code
DTC Detection Condition
Trouble Area
C1337
The following occurs in 3 consecutive trips:
At a vehicle speed of 20 km/h (12 mph) or more, there is a difference of 20% or more in the average speed between the front wheels and rear wheels for 20 seconds or more.
  1. Tire and wheel size
  2. Tire deformation
  3. Speed sensor rotor
  4. Speed sensor
  5. Speed sensor circuit
  6. Brake actuator assembly (Skid control ECU)

INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform calibration (LandCruiser RM000000XHR0BJX.html).
HINT:
When DTCs C1401 to C1416 are output with DTC C1337, inspect and repair the trouble areas indicated by DTCs C1401 to C1416 first (LandCruiser RM000000XHU0D7X.html).
1.CHECK TIRES

  1. Check the size and condition of all 4 wheels (LandCruiser RM000003DGS00UX.html).

    HINT:
    The DTC is output when tire deformation or a difference in tire size is detected.
    OK:
    The diameter and air pressure of all 4 tires are the same.


NG
REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME SIZE
OK


2.RECONFIRM DTC

  1. Clear the DTCs (LandCruiser RM000000XHV0KDX.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

  1. Check if the same DTC is output (LandCruiser RM000000XHV0KDX.html).

    Result
    Result
    		Proceed to
    DTC C1337 is output
    		A
    DTC C1337 is not output
    		B



B
USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)
A

REPLACE BRAKE ACTUATOR ASSEMBLY (LandCruiser RM0000034UX02TX.html)