Stage 1 Immobilizer

As of 12/93 up to 08/95 the pneumatic system equipment (A37, A37/1) will have an electrical output (pin 1 on plug 2) to actuate the immobilizer relay (K38) for the function of the immobilizer.


If the vehicle is unlocked from outside via one of the three operating points (convenience switch SN1 operates), the immobilizer output is switched to ground. After the ignition is switched on, the immobilizer relay (K38) picks up and closes the starter current circuit. The vehicle can be started.

If the vehicle is locked from outside via one of the three operating points (convenience switch SN2 operates), ground actuation for the immobilizer relay (k38) is open-circuited via the immobilizer output.

The starter current circuit is open-circuited as a result and the vehicle cannot be started.


NOTE: On vehicles as of 12/93 up to 08/95 with infrared remote central locking (IRCL), the immobilizer relay (K38) is not actuated via the pneumatic system equipment (A37, A37/1), but via the infrared remote central locking control module (N54). Keyless Entry






Immobilizer stage 1






Location of components for Immobilizer stage 1
(shown on sedan)