Repair Procedures: Replacement

NOTE:

If a DTC occurs in the ECU, check the connectors and wiring. If no problem is found, replace the ECU.

CAUTION:

Before replacing the MDPS ECU, use the diagnostic device to read the settings of the old ECU

Perform the "ECU data backup" by GDS following in the order below.
1. Connect self - diagnosis connector (16 pins) located in the lower of driver side crash pad to self - diagnosis device.
2. Turn the self - diagnosis device after key is ON.
3. After Selecting the "vehicle model" and "EPS system" on GDS vehicle selection screen.
4. Select the "Part exchange (Power steering ECU)"
  
  Fig 1: Scantool Display - Vehicle S/W Management
  Courtesy of HYUNDAI MOTOR AMERICA
5. Follow the instructions shown on the screen.
  
  Fig 2: Scantool Display - Part Exchange (Power Steering ECU)
  Courtesy of HYUNDAI MOTOR AMERICA
  
  Fig 3: Scantool Display - Part Exchange Procedure (Power Steering ECU)
  Courtesy of HYUNDAI MOTOR AMERICA
6. Insert the VIN number and then select the "Read" in order to the ECU information save.
  
  Fig 4: Scantool Display - ECU Data Backup Message
  Courtesy of HYUNDAI MOTOR AMERICA
Disconnect the battery negative cable from the battery and then wait for at least 30 seconds.
Remove the crash pad lower panel.
(Refer to Body - "CRASH PAD LOWER PANEL ")
Disconnect the connector from the MDPS control unit.

Fig 5: MDPS Control Unit Connector (1 Of 2)
Courtesy of HYUNDAI MOTOR AMERICA

Fig 6: MDPS Control Unit Connector (2 Of 2)
Courtesy of HYUNDAI MOTOR AMERICA
Remove the MDPS control unit from the steering column after loosening the bolts.

Fig 7: MDPS Control Unit Bolts
Courtesy of HYUNDAI MOTOR AMERICA
Replace the MDPS control unit after separating the bracket.

Fig 8: MDPS Control Unit
Courtesy of HYUNDAI MOTOR AMERICA
Install in the reverse order of removal.
Install the connector to the MDPS control unit.

Fig 9: MDPS Control Unit Connector (1 Of 2)
Courtesy of HYUNDAI MOTOR AMERICA

Fig 10: MDPS Control Unit Connector (2 Of 2)
Courtesy of HYUNDAI MOTOR AMERICA
Perform the "ECU data restore" by GDS following in the order below.
1. Connect self - diagnosis connector (16 pins) located in the lower of driver side crash pad to self - diagnosis device.
2. Turn the self - diagnosis device after key is ON.
3. After Selecting the "vehicle model" and "EPS system" on GDS vehicle selection screen.
4. Select the "Part exchange (Power steering ECU)"
  
  Fig 11: Scantool Display - Vehicle S/W Management
  Courtesy of HYUNDAI MOTOR AMERICA
5. Follow the instructions shown on the screen.
  
  Fig 12: Scantool Display - Part Exchange (Power Steering ECU)
  Courtesy of HYUNDAI MOTOR AMERICA
  
  Fig 13: Scantool Display - Part Exchange Procedure (Power Steering ECU)
  Courtesy of HYUNDAI MOTOR AMERICA
6. Insert the VIN number and then select the "Write" in order to the ECU information save.
  
  Fig 14: Scantool Display - VIN Number
  Courtesy of HYUNDAI MOTOR AMERICA
Conduct the "ASP Calibration" by GDS.
(Refer to MDPS Control Unit- "DIAGNOSIS WITH GDS ")
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")
Turn off the IGN switch and wait for 10 seconds or more. Then check the operation after starting the engine.