Kia Forte: ESC (Electronic Stability Control) System / Rear Wheel Speed Sensor

Kia Forte 2019-2020 (BD) Service Manual / Brake System / ESC (Electronic Stability Control) System / Rear Wheel Speed Sensor

Components and components location
Components
[Couple torsion beam axle type]

1. Rear wheel speed sensor connector
2. Rear wheel speed sensor

[Multi link type]

1. Rear wheel speed sensor connector
2. Rear wheel speed sensor cable
3. Rear wheel speed sensor

Repair procedures
Removal and Installation

Rear Wheel Speed Sensor Connector

[Couple torsion beam axle type]
1.

Disconnect the battery negative terminal.

2.

Remove the rear wheel and tire (A).

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 to the hub bolts when removing the rear wheel and tire.

3.

Disconnect the rear wheel speed sensor connector (A).

4.

Disconnect the rear wheel speed sensor extension wiring brackets (A) by loosening the bolts.

Tightening torque :

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

5.

Remove the rear wheel house trim.

(Refer to Body - "Rear Wheel House Trim")

6.

Disconnect the connector (A) and then remove the rear wheel speed sensor extension wiring.

7.

Install in the reverse order of removal.

[Multi link type]
1.

Disconnect the battery negative terminal.

2.

Remove the rear wheel and tire (A).

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 to the hub bolts when removing the rear wheel and tire.

3.

Disconnect the rear wheel speed sensor connector (A).

4.

Disconnect the rear wheel speed sensor extension wiring (A) by loosening the bolts.

Tightening torque

Bolts (B) : 8.8 - 13.7 N·m (0.9 - 1.4 kgf·m, 6.5 - 10.1 lb·ft)

Bolt (C) : 98.1 - 117.7 N.m (10.0 - 12.0 kgf.m, 72.3 - 86.8 lb-ft)

5.

Remove the rear wheel house trim.

(Refer to Body - "Rear Wheel House Trim")

6.

Disconnect the connector (A) and then remove the rear wheel speed sensor extension wiring.

7.

Install in the reverse order of removal.

Rear Wheel Speed Sensor

[Couple torsion beam axle type]
1.

Remove the rear wheel and tire (A).

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 to the hub bolts when removing the rear wheel and tire.

2.

Disconnect the wheel speed sensor (A).

3.

Release the parking brake lever and parking brake cable is loose.

4.

Remove the fixing clip (A) and then disconnect the parking brake cable (B).

5.

Remove the brake caliper mounting bolts (A), and then hold the brake caliper assembly with wire.

Tightening torque:

63.7 - 73.5 N·m (6.5 - 7.5 kgf·m, 47.0 - 54.2 lb·ft)

6.

Loosen the screws and then remove the rear brake disc (A).

Tightening torque:

4.9 - 5.9 N·m (0.5 - 0.6 kgf·m, 3.6 - 4.3 lb·ft, 43.4 - 52.1 lb·in)

7.

Remove the rear hub bearing (A) and dust cover (B).

Tightening torque

Rear hub bearing : 49.0 - 58.8 N·m (5.0 - 6.0 kgf·m, 36.2 - 43.4 lb·ft)

Dust cover : 6.9 - 10.8 N·m (0.7 - 1.1 kgf·m, 5.1 - 8.0 lb·ft)

8.

Install in the reverse order of removal.

[Multi link type]
1.

Disconnect the battery negative terminal.

2.

Remove the rear brake disc.

(Refer to Brake System - "Rear Disc Brake")

3.

Disconnect the rear wheel speed sensor connector (A).

4.

Loosen the rear wheel speed sensor bolts (A).

Tightening torque :

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

5.

Remove the rear wheel speed sensor (A).

6.

Install in the reverse order 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 100 Ω 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

Replacement

Rear Wheel Speed Sensor Cap

1.

Remove the rear wheel hub bearing assembly.

(Refer to Driveshaft and axle - "Rear Axle Assembly")

2.

Fix the rear hub bearing assembly (A) on the vise.

  

When fixing on the vise, use a cloth not to be damaged the hub bearing assembly.

Be careful if excessive force for fixing on the vise may damage the hub bearing assembly.

3.

Check the direction of the sensor cap (A).

  

Before removing the sensor cap, check the direction of the sensor cap connector.

4.

Remove the sensor cap by hammering on a gap between sensor cap and hub bearing assembly using a scraper (A).

  

In order to widen the gap little by little, hammering around the bearing cap 10-20 times.

When removing the sensor cap, remove it in a straight direction not to damage the tone wheel or encoder.

Be careful not to damage the hub bearing assembly when using the hammer.

5.

Check if distorted or damaged the tone wheel or encoder (A).

  

Check if damaged the tone wheel or encoder after removing the sensor cap and replace the hub bearing if it was deformed.

If the tone wheel is deformed, it may arise MIL ON or other problems.

6.

Position the sensor cap to the same direction of sensor cap connector (A) as you checked before removing.

  

Before installing the sensor cap, do not let any foreign material and contaminant into the hub bearing assembly.

7.

Install the sensor cap (A) with the special service tool (09527-AL200).

  

Be careful not to tilt to one side when installing the sensor cap as it may damage the tone wheel or encoder.

When sensor cap installation, hammering it until the gap disappeared between the sensor cap and hub bearing assembly.

Special Service Tools guide.

SST No.
SST Inner diameter
Sensor cap outer diameter
09527-2W110
Φ82.1
Φ81.2, Φ81.4
09527-1S010
Φ58.9
Φ58.4
09527-AL100
Φ60
Φ59.5
09527-AL200
Φ65.9
Φ65.3
09527-AL300
Φ67.4
Φ67.2
09527-AL400
Φ73.2
Φ72.6
09527-AL500
Φ87.2
Φ86.6

8.

Install the rear wheel hub bearing assembly.

(Refer to Driveshaft and axle - "Rear Axle Assembly")

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