C1210

DTC C1201 FL WHEEL SENSOR-RANGE/PERFORMANCE
DTC C1204 FR WHEEL SENSOR-RANGE/PERFORMANCE
DTC C1207 RL WHEEL SENSOR-RANGE/PERFORMANCE
DTC C1210 RR WHEEL SENSOR-RANGE/PERFORMANCE

DESCRIPTION
This code shows in case that a speed signal from any of the 4 wheel speed sensors does not match to the others at any speed.

DTC Detecting Condition:

FAIL-SAFE FUNCTION
Sensor malfunction without ABS control
- One wheel sensor malfunction
Only the ABS, TCS (ESC) functions are inhibited. the ABS, TCS (ESC) warning lamps are ON, but the EBD warning lamp is OFF.
- More than two wheels malfunction
The system stops. the ABS, TCS (ESC) and the EBD functions are inhibited. the ABS, TCS (ESC) and the EBD warning lamps are ON. The valve relay and all solenoids are OFF.
Sensor malfunction with ABS control
- One front wheel malfunction
Inhibit the ABS control of a wheel with a malfunctioning sensor and maintain the ABS control of other wheels. After the ABS control has completed, the ABS, TCS (ESC) functions are inhibited. The ABS, TCS (ESC) warning lamps are ON and the EBD warning lamp is OFF.
- One rear wheel malfunction
Inhibit ABS control of both front wheels and the pressure of both rear wheels is decreased.
After the controller completes the ABS control, Only the ABS, TCS (ESC) functions are inhibited. The ABS, TCS (ESC) warning lamps are ON and the EBD warning lamp is OFF.
- More than two wheels malfunction.
The system stops. the ABS, TCS (ESC) and the EBD functions are inhibited. The ABS, TCS (ESC) and the EBD warning lamps are ON. The valve relay and all solenoids are OFF.

INSPECTION PROCEDURE







1. CHECK AIR GAP BETWEEN WHEEL SPEED SENSOR AND TONE WHEEL.
Visually check the installing of wheel speed sensors and rotors (see the table given).

Specification: 0.2 - 1.3 mm

NOTE: The mounting bolt shall be tightened properly and there is no clearance is allowed between the sensor and front steering knuckle or rear axle carrier.

Is the air gap within the specification?

YES - Reinstall or replace, if necessary, wheel speed sensors in trouble.

NO - Check sensor rotor and sensor tip.




2. CHECK SENSOR ROTOR AND SENSOR TIP
Check visually the sensor rotor and the sensor tip have scratches, missing teeth or foreign objects.
Is it normal?

NO
1. Remove foreign objects form the sensor rotor and tip.
2. Replace the sensor rotor or the wheel speed sensor.

YES - After clearing the DTC and driving the vehicle at 40 km/h speed or more, if the TCS (ESC) lamp is ON and the same DTC shows again, replace the HECU and recheck.