Toyota 4Runner Quiz
Brake

Diameter of the Tire is not Uniform (C1337)

In this manual: Brake
General — 25Audio / Visual / Telematics — 283Brake — 187Drivetrain — 204Power Source / Network — 79Steering — 76Suspension — 130Vehicle Exterior — 391Vehicle Interior — 693
~1min read
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

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
CAUTION / NOTICE / HINT

NOTICE:

When replacing the master cylinder solenoid, perform calibration (See page ).


HINT:

When DTCs C1401 to C1416 are output with DTC C1337, inspect and repair the trouble areas indicated by DTCs C1401 to C1416 first (See page ).


PROCEDURE

  1. CHECK TIRE SIZE

(a) 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

  1. RECONFIRM DTC

(a) Clear the DTCs (See page ).


(b) Turn the ignition switch off.

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

(d) Check if the same DTCs are output (See page ).


HINT:

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

Result

Result

Proceed to

DTC is output

A

DTC is not output

B

A

REPLACE MASTER CYLINDER SOLENOID

B

USE SIMULATION METHOD TO CHECK

Test yourself

A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.