Installing Steering-Column Switch

NOTIFICATION 

Voltage drop 

• Irreparable damage to control unit 
• Damage to control unit 
• Fault entries in the control unit 
• Control unit programming/coding is aborted 
• Malfunctions in the control unit, even during programming/coding 

  → Switch off ignition before disconnecting the control unit.

  → Make sure that the power supply is not interrupted during programming/coding.

  → Connect the battery charger with at least > current 90 A  to the vehicle battery.

Information 

The PIWIS Tester  instructions take precedence since the description may be different with later Tester releases.

The procedure described here has been structured in general terms. Different text or additional information may appear on the PIWIS Tester  .

1. Installation is performed in reverse order. Pay particular attention to the following:

   Screw in fastening screw and tighten to > Tightening torque 6 Nm (4.5 ftlb.)  .

2. Connect tester to the vehicle and start it. Switch on ignition.
3. Select the vehicle type if necessary.
4. Select the control unit in the overview  such as for the steering wheel electronics  . Press F12 to continue. Create a Vehicle Analysis Log (VAL)? Press F11 to continue.
5. Select Maintenance/repairs  .
6. Select steering-angle sensor calibration  . Press F12 to continue and then press F8 to start.
7. Read out fault memories  and erase them if necessary.
8. Exit the diagnostic application. Switch off ignition. Disconnect tester from the vehicle.