Steering Gear Box

Components and Component Location

Components

Repair Procedures

Removal and Installation

Before replacing the R-MDPS, use the diagnostic tool to read the setting of the old ECU. [R-MDPS Only]

1. 1
   Perform "ECU Data Backup" using the diagnostic tool, following the procedure below.

   1. Connect the self-diagnosis connector (16-pin), located in the lower panel on the driver's side, to the diagnostic device.
   2. Turn on the scan tool after turning the ignition switch ON.
   3. After selecting "Vehicle Model" and "MDPS System" on the diagnostic tool vehicle selection screen.
   4. Select "MDPS Setting Data Backup and Write."

      

   5. Follow the on-screen instructions.

      

      

      

2. 2
   Turn the ignition OFF and disconnect the negative (-) battery cable.
3. 3
   Turn the steering wheel so that the front wheels are in the straight-ahead position.
4. 4
   Remove the front wheel and tire (A) from the front hub.

   Tightening torque: 107.9–128 N·m

   Be careful not to damage the hub bolts when removing the front wheel and tire (A).

   

5. 5
   Disconnect the stabilizer link from the front strut assembly after loosening the nut (A).

   Tightening torque: 98.1 - 118 N·m

   When loosening the nut (A), hold the external hexagon of the stabilizer bar link. Be careful not to damage the stabilizer bar dust boots.

   

6. 6
   Remove the tie rod end ball joint.

   1. Remove the cotter pin and nut (A).
   2. Using the SST (09568-2J100), separate the ball joint (B) from the knuckle.

      Tightening torque: 98.1 - 118 N·m

      

      

7. 7
   Remove the cotter pin and nut (A).

   Tightening torque: 98.1 - 118 N·m

   

8. 8
   Remove the lower arm from the steering knuckle using the SST (09568-4R100).

   1. Insert the support bolt (A) into the bolt hole of the lower arm.
   2. Install the support housing (B) on the front axle.
   3. Tighten the bolt (C).

      

9. 9
   Loosen the bolt (A), then disconnect the universal joint assembly from the steering gear shaft.

   Tightening torque: 32.4 - 37 N·m

   

   Do not reuse the bolt. Lock the steering wheel in the straight-ahead position to prevent damage to the clock spring internal cable. Assemble so that the universal joint hole is fitted to match the cut surface of the pinion shaft.

10. 10
    Remove the under cover. (Refer to Engine Mechanical System - "Engine Room Under Cover")
11. 11
    Disconnect the R-MDPS main connector (A). [R-MDPS Type Only]

    

12. 12
    Remove the muffler rubber mount (A).

    

13. 13
    Remove the idler arm bracket (C) by loosening the bolts (A) and (B). Tightening torque: (A): 107.9 - 128 N·m, (B): 49.0 - 64 N·m

    

14. 14
    Remove the subframe by loosening the mounting bolts and nuts.

    Install a transmission jack for safety.

    Tightening torque: Subframe mounting bolts and nuts: 176.5 - 196 N·m; Subframe mounting bolt: 44.1 - 54 N·m

    

15. 15
    Remove the heated protective cover (A).

    Tightening torque: 6.9–10.8 N·m

    [C-MDPS]

    

    [R-MDPS]

    

16. 16
    Remove the steering gear box (A) from the front subframe by loosening the mounting bolts.

    Tightening torque: 88.2 - 108 N·m

    [C-MDPS]

    

    [R-MDPS]

    

17. 17
    Install in the reverse order of removal.
18. 18
    Check alignment. (Refer to Tires/Wheels – Wheel Alignment)
19. 19
    Perform "EPS Type Recognition" using the diagnostic tool. (Refer to MDPS Motor - "Diagnosis Using GDS")
20. 20
    Perform "ECU Data Restore" using the diagnostic tool, following the procedure below. [R-MDPS Only]

    1. Connect the self-diagnosis connector (16-pin), located in the lower panel on the driver's side, to the diagnostic device.
    2. Turn on the scan tool after turning the ignition switch ON.
    3. After selecting "Vehicle Model" and "MDPS System" on the diagnostic tool vehicle selection screen.
    4. Select "MDPS Setting Data Backup and Write."

       

    5. Follow the on-screen instructions.

       

       

       

Replacement

Do not disassemble the steering gear. If the steering gear box is disassembled, noise, cleanliness, and function are not guaranteed. [C-MDPS] [R-MDPS]

1. 1
   Remove the tie rod end after loosening the nut.

   Tightening Torque: 49.0–54 N·m

   Before removing the tie rod end, measure the thread length or mark it with paint. [C-MDPS] [R-MDPS]

2. 2
   Replace with new parts.
3. 3
   Check alignment. (Refer to Tires/Wheels – Wheel Alignment)
4. 4
   Disconnect the power unit connector (A).

   

5. 5
   Replace the power unit (A) after loosening the mounting bolts.

   Tightening torque: 14.0–16 N·m

   

6. 6
   When replacing the power unit, replace only the power unit and reuse the existing short pinion. When replacing the short pinion, replace only the short pinion and reuse the existing power unit.
7. 7
   Apply grease to the gear surface of the new power unit.

   1. Noise may occur if grease is not applied or if ordinary grease is used. Therefore, be sure to use the specified grease.

      Grease specification: Multemp MM-V. Application amount: 0.7–1.2 g (50 mm)

      

   2. Apply grease to the serration area using a screwdriver or stick. Check the condition of the applied grease in the tooth area before assembling the power unit.

      

      Noise may occur if grease is not applied or if ordinary grease is applied. Therefore, be sure to apply the specified grease.

8. 8
   After replacing the power unit, perform "EPS Type Recognition" and "Steering Angle Sensor (SAS) Calibration."

   

9. 9
   Disconnect the power unit connector (A).

   

10. 10
    Replace the lead wire after disconnecting the fixed clamp (A).

    

    Warning: Before performing MDPS specification recognition or steering wheel angle initialization, use the diagnostic tool to check that the battery voltage is normal. Be careful not to disconnect any connectors or the vehicle or scan tool during MDPS specification recognition or steering wheel angle initialization. After MDPS specification recognition or steering wheel angle initialization is completed, turn the IG switch off, wait more than 10 seconds, then start the engine to check for normal operation.
11. 11
    Connect the GDS diagnostic tool to the vehicle's diagnostic connector.
12. 12
    Turn the key to the ignition lock.
13. 13
    After selecting "Vehicle Model" and "System," select "EPS Type Recognition" on the GDS vehicle selection screen. [MDPS Type Recognition]

    

    [MDPS Type Recognition 1]