KIA Niro: Rear wheel speed sensor

1. Rear wheel speed sensor

Rear Wheel Speed Sensor Components and components location

Removal

1. Remove the tire.
2. Disconnect the wheel speed sensor connector (A).

3. Loosen the bearing bolts (A) and then remove the hub bearing assembly.

Tightening torque: 88.2 - 107.8 N*m (9.0 - 11.0 kgf*m, 65.0 - 79.5 lb*ft)

Inspection

1. Measure the output voltage between the terminal of the wheel speed sensor and the body ground.

Warning

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

1. Remove the rear wheel hub bearing assembly.

   (Refer to ESP(Electronic Stability Program) System - "Rear Wheel Speed Sensor")

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

Warning

• 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).

Warning

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).

Warning

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).

Warning

• 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.

Warning

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-AL300).

Warning

• 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.

8. Install the rear wheel hub bearing assembly.

   (Refer to ESP(Electronic Stability Program) System - "Rear Wheel Speed Sensor")

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