Kia Optima: ESC (Electronic Stability Control) System / ESC Control Module

Kia Optima DL3 2019-2021 Service and Repair Manual / Brake System / ESC (Electronic Stability Control) System / ESC Control Module

Components and components location
Components

1. Front - right (FR)
2. Rear - left (RL)
3. Rear - right (RR)
4. Front - left (FL)
5. MC2
6. MC1
7. ESP control module (HECU)
8. Bracket

Repair procedures
Removal
1.

Turn ignition switch OFF and disconnect the negative (-) battery cable.

2.

Pull up the lock of the HECU connector and then disconnect the connector (A).

3.

Separate the brake tubes from the HECU by unlocking the nuts (6-ea) couterclockwise using a spanner.

Tightening torque :

13.7 - 16.7 N.m (1.4 - 1.7 kgf.m, 10.1 - 12.3 lb-ft)

Tightening torque :

18.6 - 22.6 N.m (1.9 - 2.3 kgf.m, 13.7 - 16.6 lb-ft)

4.

Loosen the ESC control module mounting nut (A) and then remove the ESC control module from the vehicle.

Tightening torque:

19.6 - 29.4 N.m (2.0 - 3.0 kgf.m, 14.4 - 21.7 lb-ft)

5.

Separate the bracket (B) after remove the mounting bolt from the HECU (A).

Installation
1.

Install in the reverse order of removal.

2.

After installation, bleed the brake system.

(Refer to Brake system - "Brake Bleeding Procedures")

3.

Conduct the Variant coding.

4.

Conduct the Auto Detected Sensor Calibration.

5.

Conduct the Longitudinal G Sensor Calibration.

6.

After replacing the ESC control module execute the "Assembly Check (ECU replacement)" of the additional function to check that the mounting is successful.

Diagnostic procedure by using diagnostic device

Perform diagnostic procedure by using diagnostic device as shown below:

Connect self-diagnosis connector (16pins) located under the driver side crash pad to self-diagnosis device, and then turn the self-diagnosis device after key is ON.

Select the "vehicle model" and "ABS/ESC" on KDS vehicle selection screen, then select OK.

[Variant Coding]

[Auto Detected Sensor Calibration]

[Longitudinal G Sensor Calibration]

[Assembly Check]

ESC (Electronic Stability Control) System
Components and components location Components 1. ESC control module (HECU) 2. Front wheel speed sensor 3. Rear wheel speed sensor 4. ABS warning lamp ...

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 ...

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