How to check Code C1202 Wheel Speed Sensor Front-LH Invalid/no Signal

How to check code c1202 wheel speed sensor front LH invalid/no signal

This Auto repair and Study guide was trouble encounter from Hyundai Genesis regarding on ECS/ABS light indicator on some times while driving. this was the trouble code appeared from the GDS C1202 Wheel speed sensor but some of trouble can not immediately caught base on the trouble code given by the GDS this is only the basis so that every technician has pattern.

Auto repair and Study guide This trouble was solve and the cause was only from the tire. all tire defective oblong that’s why the sensor from wheel can not give good signal.

Component Location,Auto repair and Study guide

 

Study guide General Description

Study guide The ESP system is the shorten word of Electronic Stability Program system. This system recognizes a critical driving condition by Yaw-rate sensor, Lateral acceleration sensor and Steering angle sensor. And then it stabilizes the Study guide and vehicle by a individual wheel braking and engine torque control through CAN communication. Among components of this system, the wheel speed sensor(WSS) is the essential component of the brake system. Study guide The ESP ECU(HECU, Hydraulic and Electronic Control Unit) uses the wheel speed sensor's signals to calculate a vehicle speed and also this Auto repair to determine whether a wheel lock occurs or not.

Auto repair DTC Description

Study guide of The HECU monitors the wheel speed sensor signal continuously and if the signal of a wheel speed sensor is omitted or too low, this DTC is set.

DTC Detecting Condition and Auto repair.

Item
Detecting Condition
Possible Cause

• Signal Monitoring

• Poor connection

• Improper installation of wheel speed sensor

• Abnormal Rotor and wheel bearing

• Faulty Wheel speed sensor

Threshold valve

• Vehicle speed = 10 kph(6.2 mph)

-Study guide and Auto repair when the maximum wheel speed is continuously over 10 km/h(6.2mph) and the other wheel speed is below 2 km/h(1.2 mph) for more than 180 seconds

• Vehicle speed = 15 kph (9.3 mph)

1. when the maximum wheel speed is continuously over 15km/h(9.3 mph) and the minimum wheel speed is below (0.4× the maximum wheel speed) for more than 120 seconds

2. when the maximum wheel speed is continuously over 40km/h(24.8 mph) and the minimum wheel speed is below (0.6× the maximum wheel speed) for more than 120 seconds

• when the brake pressure goes down or keeps up for more than 28 seconds as Study guide.

Fail-Safe

1.Only one wheel failure

: The ABS/TCS/ESP functions are inhibited.

The ABS/ESP warning lamps are activated, the EBD warning lamp is not activated.

2.More than two wheels failure

: The ABS/EBD/TCS/ESP functions are inhibited.

The ABS/EBD/ESP warning lamps are activated.

MORE INFORMATION AND TROUBLE SHOOTING

 

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