Repair Procedures: Replacement

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

1. 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: ASP Calibration GDS

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   5. Follow the instructions shown on the screen.
      Fig 2: Part Exchange (Power Steering) Condition

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      Fig 3: Part Exchange (Power Steering) Caution

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   6. Insert the VIN number and then select the "Read" in order to the ECU information save.
      Fig 4: Vin Number

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      Fig 5: ECU Data Backup

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   NOTE: If a DTC occurs in the ECU, check the connectors and wiring. If no problem is found, replace the ECU.
2. Disconnect the battery negative cable from the battery and then wait for at least 30 seconds.
3. Remove the crash pad lower panel.

   (Refer to Body - "Crash Pad Lower Panel")CRASH PAD LOWER PANEL

4. Disconnect the MDPS ECU connectors (A).
   Fig 6: Connector(A)

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5. Loosen the mounting bolts (A) and then remove the MDPS ECU (B).
   Fig 7: Mounting Bolts (A)

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6. Loosen the star wrench (A) and then remove the MDPS ECU bracket (B).
   Fig 8: Star Wrench (A)

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7. Install in the reverse order of removal.
8. 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 9: Calibration GDS

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   5. Follow the instructions shown on the screen.
      Fig 10: Part Exchange (Power Steering) Condition

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      Fig 11: Part Exchange (Power Steering) Caution

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   6. Insert the VIN number and then select the "Write" in order to the ECU information save.
      Fig 12: Vin Number

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9. Conduct the "ASP Calibration" by GDS.

   (Refer to MDPS Motor - "Diagnosis with GDS") shown bellow

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