Clockspring Assembly / Spiral Cable: Service and Repair

Removing and Installing Contact Unit for Airbag







Removing contact unit for airbag
- Observe the airbag safety regulations.
- Remove driver's airbag unit.
- Remove steering wheel.
- Remove steering column trim.
- Remove and disassemble steering column switch.

NOTE: Ensure that the arrows point to each other on the contact unit and the locking element is engaged.







1. Lift up the three retaining lugs carefully and remove the airbag contact unit -C-.

Installing contact unit for airbag

WARNING:
Risk of damaging airbag contact unit.
- If the contact unit has been adjusted, proceed in accordance with the following work instruction:
- To position the airbag contact unit in the centre position, press the locking element and turn the rotor carefully to the left as far as it will go.
- Then turn the rotor carefully to the right, approx. 3.5 to 3.75 revolutions, until the band printed on one side is visible in the window.







1. Position the airbag contact unit -C- and press on the steering column switch until the three tabs click into place.

- Assemble and install steering column switch.
- Install steering column trim.
- Install steering wheel.
- Install driver's airbag unit.

NOTE:
- The steering angle sensor is located in the airbag contact unit.
- The steering angle sensor must be re-initialized when the power supply is disconnected and connected.

2. Turn wheels to straight-ahead position.
3. Switch ignition off and then on again twice.
4. Start engine.
5. From the straight-ahead position, turn the steering wheel approx. 20°. to the left and 20°. to the right (past the straight-ahead position).
6. Drive the vehicle straight ahead for at least one second at a speed above 4 km/h (2.5 mph).

The steering angle sensor segment is recognized again in this process.

Once the sensor has been successfully initialized, the fault code that is stored in the fault memory is documented using the fault deletion counter. The fault memory erases itself automatically.

The PSM indicator light goes out in the instrument cluster and, depending on the vehicle equipment, the note Level control - workshop and Corner-sensitive headlight.