System test

NOTE: After every successful login procedure, the anti-theft immobilizer is switched free for 10 minutes, i.e. a system or function test does not make sense during this time.

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.

Disconnect electrical wire of induction coil at connector between ignition/starter switch and control module for anti-theft immobilizer.
Start engine.

Engine must be switched off and warning lamp must blink.

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

See IMMOBILIZER ON BOARD DIAGNOSTIC (OBD), INITIATING and CHECK DTC MEMORY (FUNCTION 02) .

One of the following DTCs is indicated on display.

Display on VAS5051:

Fig 1: Display On VAS5051

Courtesy of AUDI OF AMERICA, INC.

1 - 1 malfunction recognized
2 - 01176
Key signal too small

2 - 01128

Induction coil of anti-theft immobilizer -D2-

Erase DTC memory and end output.

See ERASE DTC MEMORY (FUNCTION 05) and END OUTPUT (FUNCTION 06) .