|
For disassembly service point,
follow the same service procedures as before.
|
![](../../../img/37/ACE03915AB00ENG.png)
|
caution |
Do not remove the collapse
part (shown in the illustration).
|
1.Remove the wiring harness.
|
![](../../../img/37/ACD04183AD00ENG.png)
|
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.
|
|
![](../../../img/37/AC905486AC00ENG.png)
|
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.
|
![](../../../img/37/ACD03507AB00ENG.png)
|
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.
|
|
![](../../../img/37/ACD03965AD00ENG.png)
|
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.
note |
The 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
|
![](../../../img/37/AC905486AC00ENG.png)
|
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.
|
caution |
If 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.
|
![](../../../img/37/ACE03915AC00ENG.png)
|
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.
|
![](../../../img/37/ACE03908AB00ENG.png)
![](../../../img/37/ACE03909AB00ENG.png)
|
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.
|
|
For reassembly service point,
follow the same service procedures as before.
|