C1337

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1337: Different Diameter Tire Malfunction
C1337 - 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 be equal.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration Component Tests and General Diagnostics.

HINT
When C1401 to C1408 and/or C1413 to C1416 are output with C1337, inspect and repair the trouble areas indicated by C1401 to C1408 and/or C1413 to C1416 first Vehicle Stability Control System.

PROCEDURE

1. CHECK TIRES

(a) Check the size and condition of all 4 wheels Component Tests and General Diagnostics.

HINT
The DTC is output when tire deformation or a difference in tire size is detected.

OK:

The diameter of all 4 tires and air pressure are the same.

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

2. RECONFIRM DTC

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

(b) Start the engine.

(c) Drive the vehicle at a speed of 40 km/h (25 mph) or more for at least 60 seconds.

(d) Check if the same DTC is output Reading and Clearing Diagnostic Trouble Codes.

Result:





B -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting

A -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal