Hyundai Kona: Motor Driven Power Steering / MDPS Motor Repair procedures

Hyundai Kona (OS) 2018-2025 Service Manual / Steering System / Motor Driven Power Steering / MDPS Motor Repair procedures

Replacement

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

2.	Turn the steering wheel so that the front wheels are placed in the straight ahead position.

3.	Remove the driver airbag module (DAB). (Refer to Restraint - "Driver Airbag (DAB) Moudule and Clock Spring")

Disconnect the connector (A) and then remove the steering wheel by loosening the lock bolt (B).

Tightening torque :

44.1 - 49.0 N.m (4.5 - 5.0 kgf.m, 32.5 - 36.2 lb-ft)

•	Do not reuse the steering lock bolt.

•	When assembling, match the gear teeth as the below illustration.

5.	Remove the crash pad lower panel. (Refer to Body - "Crash Pad Lower Panel")

6.	Remove the steering column shroud upper panel (A).

7.	Remove the steering column shroud lower panel (A).

8.	Disconnect the connector (A), (B) and then remove the clock spring (C).

9.	Remove the multifunction switch. (Refer to Body Electrical System - "Multifunction Switch")

10.	Disconnect the ignition switch connector (A), (B).

11.

Disconnect the MDPS ECU connector (A), (B).

•	You must separate the connector of the MDPS control unit as if it is not separated, the wiring may be damaged due to the brake pedal stopper.

12.

Remove the MDPS assembly by loosening the mounting nuts (A) and bolt (B).

Tightening torque

(A) : 25.0 - 29.4 N.m (2.5 - 3.0 kgf.m, 14.5 - 21.7 lb-ft)

(B) : 53.9 - 58.8 N.m (5.5 - 6.0 kgf.m, 39.8 - 43.4 lb-ft)

13.

Remove the motor (A) by loosening the bolts and then replace the new one.

Tightening torque :

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

•	Be sure to check the last two digits of the constant in the barcode of new MDPS motor before replacing the motor.

14.	Install in the reverse order of removal.

15.

Perform the "Inputting the motor constant value" by GDS following in the order below.

(1)	Connect self - diagnosis connector (16pins) located in the lower of driver side crash pad to self - diagnosis device.

(2)	Turn the self - diagnosis device after key is ON.

(3)	Select the "vehicle model" and "EPS system" on GDS vehicle selection screen.

(4)	Select the "Part exchange(Power steering Motor)".

(5)

Follow the instructions shown on the screen.

•	Entering incorrect motor constant value may cause a serious problem in the MDPS.

16.	Conduct the "ASP Calibration" by GDS. (Refer to MDPS Motor - "Diagnosis with GDS")

17.	Remove the DTC and then perform the Conduct the "MDPS TEST (Motor Driven Power Steering)" by GDS. (Refer to Motor Driven Power Steering - "MDPS Performance Inspection")

18.	Turn off the IGN switch and wait for 10 seconds or more. Then check the operation after starting the engine.

Diagnosis with GDS

–	Steering-angle sensor detects the steering angle and steering angle speed. Steering angle and steering angle speed are used for steering wheel damping and return controls in addition to providing assistance torque.

•	You can use a scan tool to (GDS) check if the battery voltage is proper before perform the "ASP Calibration".

•	Make sure that no connector engaged to the vehicle or scan tool is disconnected during the "ASP Calibration".

•	Once the "ASP Calibration" is complete, turn off the IG switch and wait for 10 seconds or more before starting the engine to check the operation.

ASP Calibration procedures

1.	Connect self - diagnosis connector (16pins) located in the lower of driver side crash pad to self - diagnosis device.

2.	Turn the self - diagnosis device after key is ON.

3.	Turn the steering wheel to straight ahead position.

4.	After Selecting the "vehicle model" and "system", select the "ASP Calibration" on GDS vehicle selection screen.

5.	Remove the DTC.

6.	Turn off the IG switch and wait for 10 seconds or more before starting the engine. And then make sure that MDPS works properly.

Schematic diagrams

Schematic Diagrams [MDPS] Terminal function Type Pin No Description Battery 1 Batt ...

MDPS Control Unit Repair procedures

Replacement • If a DTC occurs in the ECU, check the connectors and wiring. If ...

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