Repair Procedures: Replacement

WARNING: This page is about a different car, the 2014 Hyundai Elantra GT and 2013 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.

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 (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. After Selecting the "vehicle model" and "EPS system" on GDS vehicle selection screen.
4. Select the "Part exchange (Power steering ECU)"
  
  Fig 1: Screen Display - Part Exchange (Power Steering ECU)
  Courtesy of HYUNDAI MOTOR AMERICA
5. Follow the instructions displayed on the screen.
  
  Fig 2: Screen Display - Part Exchange (Power Steering ECU; 1 Of 2)
  Courtesy of HYUNDAI MOTOR AMERICA
  
  Fig 3: Screen Display - Part Exchange (Power Steering ECU; 2 Of 2)
  Courtesy of HYUNDAI MOTOR AMERICA
6. Insert the VIN number and then select the "Read" in order to the ECU information save.
Fig 4: Screen Display - VIN Number (1 Of 2)
Courtesy of HYUNDAI MOTOR AMERICA

Fig 5: Screen Display - VIN Number (2 Of 2)
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 ")
Disconnect the connector from the MDPS control unit.

Fig 6: Disconnecting Connector From MDPS Control Unit (1 Of 2)
Courtesy of HYUNDAI MOTOR AMERICA

Fig 7: Disconnecting Connector From MDPS Control Unit (2 Of 2)
Courtesy of HYUNDAI MOTOR AMERICA
Remove the MDPS control unit from the steering column after loosening the bolts.

Fig 8: Removing MDPS Control Unit From Steering Column Bolts
Courtesy of HYUNDAI MOTOR AMERICA
Replace the MDPS control unit after separating the bracket.

Fig 9: Replacing MDPS Control Unit
Courtesy of HYUNDAI MOTOR AMERICA
Install in the reverse order of removal.
Install the connector to the MDPS control unit.

Fig 10: Installing Connector To MDPS Control Unit (1 Of 2)
Courtesy of HYUNDAI MOTOR AMERICA

Fig 11: Installing Connector To MDPS Control Unit (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 (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. After Selecting the "vehicle model" and "EPS system" on GDS vehicle selection screen.
4. Select the "Part exchange (Power steering ECU)"
  
  Fig 12: Screen Display - Part Exchange (Power Steering ECU)
  Courtesy of HYUNDAI MOTOR AMERICA
5. Follow the instructions displayed on the screen.
  
  Fig 13: Screen Display - Part Exchange (Power Steering ECU; 1 Of 2)
  Courtesy of HYUNDAI MOTOR AMERICA
  
  Fig 14: Screen Display - Part Exchange (Power Steering ECU; 2 Of 2)
  Courtesy of HYUNDAI MOTOR AMERICA
6. Insert the VIN number and then select the "Write" in order to the ECU information save.
Fig 15: Screen 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.