Hyundai Elantra: ABS(Anti-Lock Brake 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 rear 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 rear wheel and tire (A).
3.
Disconnect the rear wheel speed sensor connector(A).

4.
Loosen the mounting bolt and then remove the wheel speed sensor cable bracket (A) and (B).

Tightening torque :
A : 8.8 ~ 13.7 N.m (0.9 ~ 1.4 kgf.m, 6.5 ~ 10.1 lb-ft)
B : 7.8 ~ 11.8 N.m (0.8 ~ 1.2 kgf.m, 5.8 ~ 8.7 lb-ft)

5.
Remove the rear seat back.
(Refer to Body - "Seat")
6.
Disconnect the rear wheel speed sensor connector (A), and than remove the rear wheel speed sensor.

7.
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 100 ? 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 ~ 2,500Hz

Rear Wheel Speed Sensor Components and Components Location
Components 1. Front wheel speed sensor2. Front wheel speed sensor cable ...

ESC(Electronic Stability Control) System
...

Other information:

Hyundai Elantra AD (2016-2020) Owners Manual: Rear Seats
Folding the rear seat The rear seatbacks can be folded to facilitate carrying long items or to increase the luggage capacity of the vehicle. WARNING Never allow passengers to sit on top of the folded down seatback while the vehicle is moving. This is not a proper seating position and no s ...

Hyundai Elantra AD (2016-2020) Owners Manual: Explanation of Scheduled Maintenance Items
Engine Oil and Filter The engine oil and filter should be changed at the intervals specified in the maintenance schedule. If the car is being driven in severe conditions, more frequent oil and filter changes are required. Drive Belts Inspect all drive belts for evidence of cuts, cracks, exces ...

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