Removal and Replacement

WM 456019 Removing and installing steering-angle sensor for PSM





Information

Information
The steering-angle sensor is integrated into 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.








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

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.





1.1. Remove lower steering-column panel -3-.
Unscrew screws -1- and unclip cable clamp -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-.
Unclip upper steering-column panel -4-, see -Arrows-, and disconnect electric plug connection.





2. Remove steering-column switch.





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

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

Note





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

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





Replacing steering-angle sensor for PSM

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





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 for PSM

Installing





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





Subsequent work

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