C1337

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1337/37: Different Diameter Tire Malfunction

DTC C1337/37 - Different Diameter Tire Malfunction

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.





INSPECTION PROCEDURE

NOTE: 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:
All 4 tires are the same size and in the same condition.

NG -- REPLACE TIRES SO THAT ALL 4 TIRES ARE SAME IN SIZE
OK -- Continue to next step.

2. INSPECT SPEED SENSOR ROTOR
(a) Check the front speed sensor circuit C0200 and rear speed sensor circuit C0210.

NG -- REPLACE SPEED SENSOR ROTOR
OK -- Continue to next step.

3. INSPECT SPEED SENSOR
(a) Check the front speed sensor circuit C0200 and rear speed sensor circuit C0210.

NG -- REPLACE SPEED SENSOR
OK -- 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 20 km/h (13 mph) or more for 60 seconds or more.
(c) Check if the same pending DTC is detected Reading and Clearing Diagnostic Trouble Codes.

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

Result:





B -- CHECK FOR INTERMITTENT PROBLEMS
A -- REPLACE MASTER CYLINDER SOLENOID