DTC C0031-62 (VSA Control Unit)

DTC C0031-62 : Left Front Wheel Speed Sensor Signal Compare Failure

NOTE:

Initial Diagnosis:
The initial on-board diagnosis occurs right after the vehicle condition is turned to the ON mode, and the ABS/VSA indicator comes on, and continues until the indicator goes off.
Regular Diagnosis:
The regular on-board diagnosis begins right after the ABS/VSA indicator goes off, and it continues until the vehicle condition is turned to the OFF (LOCK) mode.
Review "How to troubleshoot the VSA system" before doing the DTC troubleshooting procedure.
Test-drive the vehicle according to local traffic conditions and regulations. Do not test-drive on a lift unless specified.
The possible causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

Confirmation Procedure	Basic Condition: 12 volt battery voltage above 8.5 V With the Driving Pattern: Start the engine. Test-drive the vehicle at 19 mph (30 km/h) or more for at least 60 seconds. (Be careful of the surrounding traffic conditions.)
Execution	Regular Diagnosis
Duration	About 60 seconds
DTC Type	1 drive cycle ABS indicator on VSA indicator on Brake system indicator (red) on (If multiple wheel failures are detected)
Fail Safe Action	Stop EBD function (If multiple wheel failures are detected) Stop ABS function Stop VSA function Stop TCS function Stop engine drag torque control function Stop brake assist function Stop hill start assist function Stop trailer stability assist control function Stop agile handling assist control function Stop ACC function Stop CMBS function
Possible Cause	Short to another line between the VSA modulator-control unit and the left-front wheel speed sensor (FRR-, FRL-, RRR-, RRL- lines) Left-front wheel speed sensor incorrect installation Left-front wheel speed sensor failure Left-front wheel bearing (magnetic encoder) failure VSA modulator-control unit internal failure