Kia Optima: ESC (Electronic Stability Control) System / Front Wheel Speed Sensor

Kia Optima DL3 2019-2021 Service and Repair Manual / Brake System / ESC (Electronic Stability Control) System / Front Wheel Speed Sensor

Components and components location
Components

1. Front wheel speed sensor

2. Front wheel speed sensor connector

Repair procedures
Removal and Installation
1.

Disconnect the (-) battery terminal.

2.

Remove the front wheel and tire.

(Refer to Suspension System - "Wheel")

3.

Remove the front wheel guard.

(Refer to Body - "Front Wheel Guard")

4.

Disconnect the front wheel speed sensor connector (A) and then remove the fixing clip (B).

5.

Remove the front wheel speed sensor cable braket bolt (A).

Tightening torque :

19.6 - 29.4N.m (2.0 - 3.0 kgf.m, 14.5 - 21.7 lb-ft)

6.

Loosen the bolt and then disconnect the front wheel speed sensor (A).

Tightening torque :

6.9 - 10.8 N.m (0.7 - 1.1 kgf.m, 5.1 - 8.0 lb-ft)

7.

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 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

Installation
1.

Install in the reverse order of removal.

ESC OFF Switch
Description and operation Description 1. The ESC OFF switch is for the user to turn off the ESC system. 2. The ESC OFF lamp is on when ESC OFF s ...

Rear Wheel Speed Sensor
Components and components location Components 1. Rear wheel speed sensor 2. Rear wheel speed sensor connector Repair procedures Remova ...

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