C1205

DTC C1202 FL WHEEL SPEED SENSOR-NO SIGNAL
DTC C1205 FR WHEEL SPEED SENSOR-NO SIGNAL
DTC C1208 RL WHEEL SPEED SENSOR-NO SIGNAL
DTC C1211 RR WHEEL SPEED SENSOR-NO SIGNAL

DESCRIPTION
This code shows in case that there is no signal from any of the wheel speed sensors caused by an air gap, etc.

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 replaces if necessary, wheel speed sensors in trouble.

NO - Check resistance between terminals of wheel speed sensor.

2. CHECK RESISTANCE BETWEEN TERMINALS OF WHEEL SPEED SENSOR.
1. Disconnect the HECU connector.




2. Measure the resistance between wheel speed sensors (+) and (-) circuit terminals (see the table given).

Is the resistance within less than 1 ohm?

YES
1. There is a short in the circuit between the HECU and the wheel speed sensor.
2. Replace the wheel speed sensor.

NO - Check speed of each wheel.

3. CHECK SPEED OF EACH WHEEL
Check if the speed of each of four wheel properly represents the speed of a vehicle, increasing the speed of the vehicle till 60 km/h.
Is the speed of each wheel the same as that of the vehicle?

NO
1. Check any foreign objects on the rotor of the wheel in trouble.
2. Check if the excitor is genuine.

YES - After cleaning the DTC and driving the vehicle at 40 km/h speed or more, if the ABS warning lamp is ON and the same DTC shows again, replace the HECU and recheck.