Steering Angle Sensor: Service and Repair

Removing and installing steering-angle sensor for PSM





Information
The steering-angle sensor is integrated into the steering-column switch. The steering angle is recorded in the airbag contact unit (spring).

Only replace the steering-angle sensor together with the airbag contact unit (spring) and electronic unit.





Steering-angle sensor





Diagram of steering-column switch

A - Direction indicator switch

B - On-board computer switch

C - Wiper switch

D - Cruise control switch

E - Airbag contact unit (spring)/steering-angle sensor

F - Electronic unit

Preliminary work

1. Remove airbag unit.
2. Remove steering wheel.

Removing

Caution
Malfunction
^ Fault in airbag contact unit (spring)!

-> Airbag contact unit (spring) must not be twisted.

1. Remove steering-column panels.





Steering-column panels

1.1. Remove lower steering-column panel -3-.

Remove screws -1- and unclip cable attachment -2-.

Move steering-wheel adjustment lever to a vertical position and remove lower steering column panel -3-.

1.2. Remove upper steering-column panel -4-.





Steering-column switch

Unclip upper steering-column panel -4- - see -Arrows- - and disconnect electric plug connection.

2. Remove steering-column switch.





Steering-column switch, bottom

Remove screw -1-, unclip cable guide -2-, pull off electric plug connections and pull out steering-column switch.

3. Remove airbag contact unit (spring) from steering-column switch.

Information





Airbag contact unit marking

Ensure that arrow -A- on the rotor is positioned between the markings -13- of the arrows -C- on the airbag contact unit and that the locking element -D- is engaged.





Airbag contact unit

Unclip airbag contact unit (spring) -Arrows- and remove it carefully.

Replacing

The steering-angle sensor can only be replaced together with the airbag contact unit -E- and electronic unit -F-.





Diagram of steering-column switch

A - Direction indicator switch

B - On-board computer switch

C - Wiper switch

D - Cruise control switch

E - Airbag contact unit (spring)/steering-angle sensor

F - Electronic unit

1. Replace the steering-angle sensor.

Replace the airbag contact unit (spring)/steering-angle sensor -E- and electronic unit -F-.

Installing





Steering-angle sensor

1. Install in reverse order.
2. Install steering-column switch.





Subsequent work

1. Install steering wheel.
2. Install airbag unit.
3. Initialize and calibrate steering-angle sensor.