Hyundai Palisade: Motor Driven Power Steering / Repair procedures

Hyundai Palisade (LX2) 2020-2024 Service Manual / Steering System / Motor Driven Power Steering / Repair procedures

A/S Repair produres [C-MDPS]

MDPS System A/S Workflow

Hyundai Palisade. Repair procedures

① Noise / malfunction Inspection

Hyundai Palisade. Repair procedures

② Warning lamp (DTC) / CAN Line error

2 - 1 Checking Connectors and Wiring

Checking Connectors and Wiring.

Check for damage, push-back, or improper connection in each connector and wiring.

(1)

Check the wiring on the vehicle side.

–	Check for open / short - circuit due to faulty connection, damage, or foreign substance.

(2)

Check the wiring on the ECU side (motor 3 - phase power).

–	Check for open / short - circuit due to faulty connection, damage, or foreign substance.

(3)

Check the motor connector.

–

Terminal Expansion and damage

Hyundai Palisade. Repair procedures

•	Must be replaced the MDPS motor if occur terminal expansion and damage.

(4)

Check the motor wiring.

Hyundai Palisade. Repair procedures

•	Must be replaced the MDPS motor if occur damage or problem.

(5)

Remove the grommet (A) and then check the wiring on the TAS side (B) and ECU side (C).

–

Check for damage, push-back, or improper connection in each connector and wiring.

Hyundai Palisade. Repair procedures

Must be replaced the MDPS assembly if occur damage or problem.

Check the TAS wiring in case of C1259/C1290 DTC.

2 - 2 Inspection Items per DTC

DTC	Problem	First analysis method	How to repair
C1290	Torque sensor signal error	First erase DTC, check connector connection.	In case of reoccurrence, replace column & housing.
C1112	Torque sensor voltage error	Check connector between torque sensor and ECU.	In case of reoccurrence, replace ECU.
C1705	ECU hardware error	First erase DTC and then check, check ECU connector.
C1604	ECU over/discharge error
C2413	ECU hardware error
C2400	Motor signal error		IIn case of reoccurrence, replace motor.
C2401	Motor circuit error		IIn case of reoccurrence, replace motor.
C2412	Motor voltage supply error	First erase DTC and check, Check ECU/motor connector.	First replace ECU. In case of reoccurrence, replace motor.
C1259	Angle sensor signal error	After Resetting zero point & erasing DTC, check connector connection condition.	In case of reoccurrence, replace column & Housing.
C1261	Zero-setting error	After Resetting zero point, recheck.	Reset the zero-setting.
C1102	Battery voltage problem	Check battery voltage condition.	Recharge battery voltage.
C1696,C1697	SPAS signal error	Check SPAS.	Erase DTC (MDPS is not to be replaced).
C1612,C1646	TCU signal error	Check TCU.
C1628,C1656	Instrument cluster signal error	Check instrument cluster.
C1692,C1693	VSM signal error	Check VSM.
C1260	Angle sensor signal error	After resetting the angle, recheck. If C1259 does not occur, check CAN line.	Reset Angle sensor. Erase DTC.
C1611	CAN time out EMS	1. Check G-SCAN condition. 2. Check connector connection. 3. Check ECU CAN line. 4. Check MDPS ground line.	Check the EMS CAN Line.
C1616	CAN BUS OFF		Check the chassis CAN Line.
C1622	Vehicle speed signal error		Check the EMS (Engine ECU).
C1623,C1687,C1688	Can time out Steering angle sensor	1. Check MDPS Power Connector & FUSE 2. Check MDPS Ground line 3. Check MDPS ECU / VSM CAN line 4. Communication status with GDS	In case of reoccurrence, replace ECU (Heavy steering and no communication)

③ MDPS Performance Inspection

1.	Inspect steering angle and DTCs relevant to the steering system.

Inspection for heavy steering effort

(1)	Inspect tire pressure and width.

(2)	Check DTCs relevant to the CAN communication error.

(3)	Check the wheel alignment.

④ MDPS common problems

Case 1	Case 2	Case 3

U-Joint noise	Clock spring noise	DAB / Wire noise
Retighten the bolt	Replace clock spring	Rearrange and replace DAB

Case 4	Case 5	Case 6

Multifunction switch noise	MB nut mount defect	M10 nut mount defect
Replace multifunction switch	Retighten nut	Retighten nut

Case 7	Case 8

Cowl top bolt mount defect	Cowl bar nut mount defect
Retighten cowl top bolt	Replace clock spring

Cautions to be taken when handling the MDPS (Motor Driven Power Steering)

•	Failure occurs due to internal damage because of the drop of and shock and excessive external force on the new partial component. → Be cautious of shock on the partial component and replace the damaged part (due to drop, etc.) with a new one.

•	When fastening the steering, excessive impact may result in twisting the center point of the torque sensor.

•	When removing/installing the connector the wiring may be damaged (deformed) by excessive external force.

•	Be cautious when storing and replacing the partial components under the abnormal temperature and humidity conditions.

A/S Repair Procedures [R-MDPS]

Column & Housing Noise Repair Guide

Hyundai Palisade. Repair procedures

R-MDPS Warning lamp Diagnosis Guide

Hyundai Palisade. Repair procedures

Inspection Items per DTC

DTC	Problem	First analysis method	How to repair
C1290	Torque sensor signal error	Check after erasing the DTC, Check torque sensor, MDPS power pack connector	Replace short gear
C1112	Torque sensor voltage error		In case of reoccurrence, replace MDPS power pack
C1705	ECU over/discharge error
C1604	ECU hardware error
C2413	ECU hardware error
C2400	Motor signal error
C2401	Motor circuit error
C2412	Motor voltage supply error	Check after erasing the DTC, Check ECU / motor connector
C1259	Steering angle signal error	Check after resetting Steering angle zero point
C1259	Steering angle signal error	Check connector connection condition
C1261	Steering angle signal error	Check after resetting Steering angle zero point	Reset Steering angle zero point
C1102	Battery voltage low	Check battery voltage condition	Recharge battery voltage.
C1696,C1697	SPAS signal error	Check SPAS	Erase DTC (MDPS is not to be replaced).
C1612,C1646	TCU signal error	Check TCU
C1628,C1633,C1656	Clutster signal error	Check cluster
C1692,C1693	VSM signal error	Check VCM
C1260	Steering angle signal error	Check after resetting steering angle zero point	Reset Steering angle zero point
C1260	Steering angle signal error	If C1259 does not occur, check CAN line.	Erase DTC
C1611	CAN TIME OUT EMS	1. Check G-SCAN condition	Check engine ECU, chassis CAN line
C1613	Engine signal error	2. Check connector connection	Check EMS (Engine ECU)
C1616	CAN BUS OFF	3. Check ECU CAN connector.	Check chassis CAN line
C1622	Vehicle speed signal error	4. Check MDPS ground line	Check EMS (Engine ECU)
C1814	CAN SAS signal error	Check SAS unit	Erase DTC
C1704	ECU relay error	Check after erasing the DTC, Check ECU connector	In case of reoccurrence, replace MDPS power pack
C1659	CAN SAS signal not entered	Check SAS UNIT, chassis CAN line.	Erase DTC
C1804	LKAS signal not entered	Check LKAS ECU	Erase DTC
C1805	LKAS signal error	Check LKAS ECU	Erase DTC
C1812	GATEWAY signal not entered	Check engine ECU CAN line	Erase DTC
C1817	GATEWAY signal error	Check engine ECU CAN line	Erase DTC
C1704	ECU relay error	Check after erasing the DTC, Check ECU connector	In case of reoccurrence, replace MDPS power pack

Checking Connectors and Wiring

Checking Connectors and Wiring.

Check for damage, push-back, or improper connection in each connector and wiring.

(1)

Check the wiring on the vehicle side.

- Check for open / short - circuit due to faulty connection, damage, or foreign substance.

Hyundai Palisade. Repair procedures

The following phenomena are not malfunctions when the MDPS warning lamp is not lit.

•	There is no auxiliary steering force temporarily during the MDPS system self-diagnosis time (about 2 seconds) immediately after the engine starts, but this is not a malfunction.

•	There is noise due to relay connection when the engine is on or off, but this is a normal operation sound.

•	There is noise caused by motor rotation when operating the steering wheel in a stationary or low-speed driving state, but this is a normal operating sound.

MDPS(Motor Driven Power Steering) Handling precautions

1.	A failure may occur due to the internal damage when a new partial part is dropped, impacted or excessive external load is applied. → If a partial part is impacted or is dropped, replace it with a new part.

2.	If excessive impact is applied when assembling the steering wheel, center point of the torque sensor may be warped. → Caution is needed when tightening by excessive impact.

3.	Be careful for the damage to the wiring due to deformation, when detaching/attaching the contactor or excessive external force is applied. → Excessive insertion of the connector or using after removal is prohibited.

4.	Caution is needed for partial part storage and replacement work under abnormal condition of the temperature and humidity.

MDPS PowerPack Assembly

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Hyundai Palisade: Motor Driven Power Steering / Repair procedures

Schematic diagrams

MDPS PowerPack Assembly

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