C1337

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1337/37: Diameter of the Tire is not Uniform
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 sensor. These signals are used for recognizing that all 4 wheels are operating properly. Therefore, all wheel signals must be equal.





INSPECTION PROCEDURE

NOTICE:
When replacing the master cylinder solenoid, perform zero point calibration Programming and Relearning.

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 -- Continue to next step.

2. INSPECT SPEED SENSOR ROTOR

(a) Check the front speed sensor rotors C0200 and rear speed sensor rotors C0210.

Result





C -- REPLACE REAR AXLE HUB AND BEARING ASSEMBLY (SPEED SENSOR ROTOR)

B -- REPLACE FRONT AXLE HUB SUB-ASSEMBLY (SPEED SENSOR ROTOR)
A -- Continue to next step.

3. INSPECT SPEED SENSOR

(a) Check the front speed sensor circuit C0200 and rear speed sensor circuit C0210.

Result





C -- REPLACE REAR SPEED SENSOR Removal

B -- REPLACE FRONT SPEED SENSOR Removal
A -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SPEED SENSOR)

(a) Check the front speed sensor circuit C0200 and rear speed sensor circuit C0210.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. RECONFIRM DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Drive the vehicle at a speed of approximately 32 km/h (20 mph) or more for 60 seconds or more.

(c) Check if the same DTCs are output Reading and Clearing Diagnostic Trouble Codes.

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

Result





B -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

A -- REPLACE MASTER CYLINDER SOLENOID