Dtc C1337/37 Diameter Of The Tire Is Not Uniform


DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK TIRE SIZE

RECONFIRM DTC

DTC C1337/37 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 whether all 4 wheels are operating properly. Therefore, all wheel signals must indicate the same speed.

DTC Code
DTC Detection Condition
Trouble Area
C1337/37
When either condition below is met:
  1. Diameters of 2 front wheels different from diameters of 2 rear wheels.
  2. Wheel speed sensor fault.
  1. Speed sensor circuit
  2. Tire sizes
  3. Skid control ECU (Brake actuator assembly)

INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration (Toyota Fortuner RM000000XHR02TX.html).
1.CHECK FOR DTC

  1. Check if any DTCs relating to the speed sensor circuit are output (Toyota Fortuner RM000000XHV03YX.html).

    Result
    Result
    		Proceed to
    DTC not output
    		A
    DTC output
    		B



B
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
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
OK


3.RECONFIRM DTC

  1. Clear the DTC(s) (Toyota Fortuner RM000000XHV03YX.html).

  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 detected.

    Result
    Result
    		Proceed to
    DTC output
    		A
    DTC not output
    		B



B
CHECK FOR INTERMITTENT PROBLEMS
A

REPLACE BRAKE ACTUATOR ASSEMBLY