Toyota 4Runner: Diameter of the Tire is not Uniform (C1337)

Toyota 4Runner Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Diameter of the Tire is not Uniform (C1337)

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.

REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME SIZE

2.	RECONFIRM DTC

(a) Clear the DTCs (See page ).

(b) Turn the ignition switch off.

(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

REPLACE MASTER CYLINDER SOLENOID

USE SIMULATION METHOD TO CHECK

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