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) Service Manual: Heater & A/C Control Unit (DATC) Components and Components Location
Components ConnectorPin NOFunctionConnectorPin NOFunctionA1Battery (+)A21IGN12IGN222ILL+ (TAIL)3ISG B+23Sensor ground REF (+5V)4Mode control actuator (Vent)24C_CAN High5Mode control actuator (Def)25C_CAN Low6Mode control actuator (Feedback)26HTD (Rear defog indicator)7Intake actuator (Fresh)27- ...

Hyundai Elantra AD (2016-2020) Owners Manual: Maintenance Under Severe Usage Conditions
The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer to the chart below for the appropriate maintenance intervals. I : Inspect and if necessary, adjust, correct, clean or replace. R : Replace or change. Severe Driving Conditions ...

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