Hyundai Sonata: ESP(Electronic Stability Program) System / Front Wheel Speed Sensor Repair procedures

Removal

1.	Raise the vehicle, and make sure it is securely supported.

Remove the wheel cap(A).

Be careful not to damage to the wheel cap(A) when removing the it.

Remove the front wheel and tire (A) from front hub.

Tightening torque:

88.2 ~ 107.8 N.m (9.0 ~ 11.0 kgf.m, 65.0 ~ 79.5 lb-ft)

Be careful not to damage to the hub bolts when removing the front wheel and tire (A).

Remove the front wheel speed sensor mounting bolt (A).

Tightening torque:

8.8 ~ 13.7 N.m (0.9 ~ 1.4 kgf.m, 6.5 ~ 10.1 lb-ft)

Remove the front wheel speed sensor cable mounting bolt (A).

Tightening torque:

Shock absorber : 8.8 ~ 13.7 N.m (0.9 ~ 1.4 kgf.m, 6.5 ~ 10.1 lb-ft)

Body : 19.6 ~ 29.4 N.m (2.0 ~ 3.0 kgf.m, 14.5 ~ 21.7 lb-ft)

6.	Disconnect the front wheel speed sensor connector, then remove the front wheel speed sensor.

7.	Installation is the reverse of removal.

Inspection

Measure the output voltage between the terminal of the wheel speed sensor and the body ground.

In order to protect the wheel speed sensor, when measuring output voltage, a 100 ? resister must be used as shown.

Compare the change of the output voltage of the wheel speed sensor to the normal change of the output voltage as shown below.

V_low : 0.59V ~ 0.84V

V_high : 1.18V ~ 1.68V

Frequency range : 1 ~ 2,500Hz

Components 1. Front wheel speed sensor connector2. Front wheel speed sensor ...

Components 1. Rear wheel speed sensor2. Rear wheel speed sensor cable ...