Immobilizer, Testing

Immobilizer, Testing

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.

• After reconnecting vehicle battery, re-code and check operation of anti-theft radio. Also check operation of clock and power windows according to Repair Information and/or Owner's Manual.

• Steps after reconnecting voltage supply => Battery.

• The control module for immobilizer is integrated into the instrument cluster, i.e. the control module for immobilizer is replaced together with the instrument cluster => [ Instrument Cluster ] Instrument Cluster.

=> [ Anti-Theft Immobilizer System, Testing ]

Anti-Theft Immobilizer System, Testing

• The immobilizer is deactivated for a period of 10 minutes after every successful log-in function: The operation of system should not be tested during this period.

- Switch ignition off for at least 5 minutes.

- Cover induction coil with a metal plate with cut-out, e.g. by placing a fitting shim washer onto the ignition lock and inserting the ignition key into the ignition lock through the hole.

or

- Disconnect wire of induction coil at connector between ignition/starter switch and instrument cluster.

- Start engine.

Engine must be switched off and warning light must flash.

- Initiate On Board Diagnostic (OBD) of anti-theft immobilizer and check DTC memory.

Do this using vehicle diagnostic, testing and information system (VAS5051).

One of the following DTCs is indicated on display:

• Key signal too low

or

• Induction coil of immobilizer (D2)

- Erase DTC memory and end output.