Steering Angle Sensor: Service and Repair

REMOVAL AND INSTALLATION

CAUTION:

- Be sure to remove the clock spring from the column switch and center the clock spring to prevent the damage of steering wheel sensor.
- If the center of the clock spring is not correctly aligned, the steering wheel may not be turned fully or the cable inside the clock spring may be broken, causing the SRS air bag to be inoperative or operated incorrectly.
- Before removing the steering wheel/air bag module assembly, refer to Service Precautions Service Precautions and Air Bag Module and Clock Spring Removal and Installation .
- When the steering wheel sensor is replaced or installed, always carry out calibration to make ASC-ECU learn the neutral point (Refer to Testing and Inspection ).
- After adjusting the wheel alignment, always carry out calibration of the steering wheel sensor to make ASC-ECU learn the neutral point. (Refer to Testing and Inspection .)













Required Special Tools:

- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A

REMOVAL SERVICE POINT

[[A]] STEERING WHEEL SENSOR REMOVAL

CAUTION:

When removing the steering wheel sensor from the clock spring, do not rotate the sensor rotating part with it energized.

Disengage the claws of the clock spring one by one in a clockwise or counterclockwise direction. Remove the steering wheel sensor from the clock spring.

INSTALLATION SERVICE POINT

]]A[[ STEERING WHEEL SENSOR INSTALLATION

CAUTION:

- Install the steering wheel sensor with its rotating part removed. If the rotating part is rotated 360°, a failure occurs in calibration, steering wheel sensor and ASC system.
- After installation, check the steering wheel neutral position of the data list No.11 by scan tool MB991958.

Insert the protrusion of the clock spring into the hole of the steering wheel sensor.
Securely fit the protrusion of the steering wheel sensor into the groove of the clock spring to install the steering sensor.

NOTE:
A new steering wheel sensor has a pin for preventing the rotation of (fixing) the steering wheel sensor. After installing the column switch assembly, remove this pin.