Ignition Switch: Service Precautions

Lock Cylinder And Ignition/starter Switch, Servicing

CAUTION:
Before beginning repairs on the electrical system:
- Obtain the anti-theft radio security code.
- Switch the ignition off.
- Disconnect the battery Ground (GND) strap.
- On vehicles equipped with Audi Telematics by OnStar, switch-off the emergency (backup) battery for the Telematic/Telephone Control Module prior to disconnecting vehicle battery.
- After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows.
- After reconnecting vehicle battery on vehicles equipped with Audi Telematics by OnStar, switch-on the emergency (backup) battery for the Telematic/Telephone Control Module.

- Switch ignition off and disconnect battery Ground (GND) strap.

NOTE
- Induction coil for anti-theft immobilizer is connected to lock cylinder and cannot be replaced individually.
- If the induction coil is faulty, the lock cylinder must be replaced.
- Observe induction coil specifications when replacing lock cylinders.