Hyundai Ioniq (AE): ESP(Electronic Stability Program) System / Rear Wheel Speed Sensor. Repair procedures

Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual / Brake System / ESP(Electronic Stability Program) System / Rear Wheel Speed Sensor. 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 the rear 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 rear wheel and tire (A).
3.
Disconnect the rear wheel speed sensor connector (A).

4.
Loosen the mounting bolts (A) and then remove the hub bearing.
Tightening torque :
88.2 - 107.8 N.m (9.0 - 11.0 kgf.m, 65.0 - 79.5 lb-ft)

5.
Installation in the reverse of removal.
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

    Components1. Rear wheel speed sensor cable2. Rear wheel speed sensor connector

    Description1.The ESP OFF switch is for the user to turn off the ESP system.2.The ESP OFF lamp is on when ESP OFF switch is engaged.

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