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DISASSEMBLY AND REASSEMBLY
caution
  • Do not reuse the product that has been dropped because its internal components may be defective even if it has no apparent damage.
  • Always keep motor (EPS-ECU) away from the matter that generates magnetic force.
  • Handle carefully to prevent binding or damage of the wiring harness.
 
 
Disassembly steps
>>C<<1.Bracket
>>C<<2.Body
3.Steering lock dummy bracket assembly
>>B<<4.Steering column band
<<A>>>>A<<5.Motor (EPS-ECU) connector
<<A>>>>A<<6.Motor (EPS-ECU)
7.Spacer*
8.Rubber spring*
9.Steering column shaft
note
  • The steering lock dummy bracket assembly (including a bracket, a housing and a flange bolt) is installed to secure the paddle shift assembly.
  • The steering lock dummy bracket is supplied not only as an assembly but also individually (the bracket, the housing and the flange bolt).
  • When it is supplied as an assembly, the housing and the bracket have been assembled by the flange bolt.
  • *: After removing the spacer and the rubber spring, be careful not to lose them.
Required Special Tools:
 
 
DISASSEMBLY SERVICE POINT
 
 
<<A>> MOTOR (EPS-ECU) REMOVAL
cautionDo not remove the collapse part (shown in the illustration).
1. Remove the wiring harness.
2. Adjust the electric motor so that its mating surface is horizontal, and then secure the worm gear housing on the steering column shaft with a vice.
caution
  • While clamping, be sure to keep the mating surface of the motor horizontal.
  • Clamp the worm housing in a vice via rag to prevent damage.
3. Install the nut to the end of the steering column shaft. Then use the preload socket (Special tool: MB990326) to rotate the shaft at a rate of one turn per 4 to 6 seconds, and then measure the total rotation torque.
note
  • Be sure to make a note of the measured value, as the value will be used when installing the motor.
  • Rotate by 180° in left and right directions from the neutral position, and measure the total rotation torque.
4. Remove the motor mounting bolts.
 
 
 
 
REASSEMBLY SERVICE POINTS
 
 
>>A<< MOTOR (EPS-ECU) INSTALLATION
1. Insert the motor, and check that the motor flange moves with the bolts not tightened.
caution
  • Be careful to avoid scratches or intrusion of foreign materials on the mating surface of the motor and the worm housing.
  • Proceed carefully to ensure that the electric motor does not move, otherwise noise may be caused.
2. Rotate the steering column shaft at a speed of approximately one turn per second. While doing so, tighten the electric motor mounting bolts alternately by hand.
noteThe steering column shaft can be rotated in either direction (right and left).
3. Tighten the electric motor mounting bolts to the specified torque.
Tightening torque: 19 ± 3 N·m (14 ± 2 ft-lb·)
4. Install the two nut to the end of the steering column shaft. Then use the preload socket (Special tool: MB990326) to rotate the shaft at a speed of one turn per 4 to 6 seconds, and then measure the total rotation torque.
note
  • Be sure to make a note of the measured value, as the value will be used when installing the motor.
  • Rotate by 180° in left and right directions from the neutral position, and measure the total rotation torque.
cautionIf the total rotation torque fluctuation compared with the value measured at removal is ±10% or more, remove the motor again and repeat installation steps 1, 2 and 3.
5. Connect the wiring harness.
6. Use a black felt pen to apply a mark near the label as shown as a visual indication that this work has been completed.
 

 
 
>>B<< STEERING COLUMN BAND INSTALLATION
caution
  • There must be no clearance between the torque sensor wiring harness and the housing.
  • Guide the steering column band between the sensor housing mounting bolt and the projection on the worm housing.
  • On completion, check the followings.
    • The wiring harness must be free of twists, sharp bend.
    • The wiring harness must be secured without looseness.
Tie the wiring harness wires with the steering column band.
 

 
 
>>C<< BODY/BRACKET INSTALLATION
1. Insert the housing from the column shaft end, and then engage the protrusion on the housing with the recess on the steering column shaft assembly.
2. Tighten the flange bolt to the specified torque.
Tightening torque: 12 ± 5 N·m (106 ± 44 in-lb)