Clockspring Assembly / Spiral Cable: Service and Repair

Removing And Installing Contact Unit For Airbag

Preliminary work
1. Remove driver's airbag unit.
2. Remove steering wheel.
3. Remove steering column trim.
4. Remove and disassemble steering column switch.

Removing contact unit for airbag

ATTENTION:
Incorrect handling of airbag units.
- Danger of injury and material damage.
- Always observe the safety regulations for handling airbag units

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












1. Carefully lift up the three retaining tabs and remove airbag contact unit.







Installing contact unit for airbag

ATTENTION:
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 central 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 airbag contact unit and press onto the steering column switch until the three tabs engage.







Calibrating steering-angle sensor

NOTE:
- The steering-angle sensor must be re-calibrated after replacing the airbag contact unit.
- To correctly calibrate the steering angle sensor, the vehicle must be on the measuring platform.

The steering angle sensor must be calibrated using the menu with Porsche System Tester under the specified test conditions:

Running gear set according to Porsche specifications.

Wheels in straight-ahead position and steering wheel horizontal.

In the straight-ahead position, the steering wheel may be turned by max. ±2.0° from the horizontal position (steering centre position).

1. Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition. Continue with .>>" key.
2. Select vehicle type. Continue with .>>" key.
3. Select the PSM control unit and activate using the .>>" key.
4. Select Actual values and activate with the .>>" key.
5. Select Security code and activate with the .>>" key.
6. Note the security code and use the .<<" key to go back to the calibration.
7. Select Calibration and activate with the .>>" key.
8. Input Security code and activate with the .>>" key.
9. Activate security code using the .F7" key.
10. Select Steering-angle sensor and activate with the .>>" key.
11. Read safety instructions and activate with the .F7" key.
12. After successful calibration, the stored fault code is erased from the fault memory. The PSM indicator light in the instrument cluster goes out.
13. Read out the fault memory and, if necessary, erase it.

Subsequent work
1. Assemble and install steering column switch
2. Install steering column trim.
3. Install steering wheel.
4. Install driver's airbag unit.
5. Steering-angle sensor calibration