Hyundai i-30: ESP (Electronic Stability Program) System / Front Wheel Speed Sensor

Hyundai i30 (PD) 2018-2025 Service Manual / Brake System / ESP (Electronic Stability Program) System / Front Wheel Speed Sensor

Components and components location
Components

1. Front wheel speed sensor
 2. Front wheel speed sensor connector

Repair procedures
Removal
1.
Loosen the wheel nuts slightly.
Raise the vehicle, and make sure it is securely supported.
2.
Remove the front wheel and tire (A) from front hub .
Tightening torque :
107.9 - 127.5 N.m (11.0 - 13.0 kgf.m, 79.6 - 94.0 lb-ft)

  
•
Be careful not to damage the hub bolts when removing the front wheel and tire (A).
3.
Loosen the mounting holt and then remove the wheel speed sensor cable from the strut assembly.
Tightening torque :
8.8 - 13.7 N.m(0.9 - 1.4 kgf.m, 6.5 - 10.1 lb-ft)

4.
Remove the wheel speed sensor cable braket bolt (A).
Tightening torque :
7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb-ft)

5.
Remove the front wheel guard.
6.
Disconnect the wheel speed sensor connector (A) and then remove it.
7.
Loosen the bolt and then remove the wheel speed sensor (A).
Tightening torque :
6.9 - 10.8 N.m (0.7 - 1.1 kgf.m, 5.1 - 8.0 lb-ft)

8.
To install, reverse the removal procedure.
Inspection
1.
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 100Ω resister must be used as shown.

2.
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 - 2,500 Hz

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