Reading Off and Erasing Alarm Causes

Reading Off And Erasing Alarm Causes

The control module can store up to 8 different alarm causes although only 5 alarm causes can be stored at the same time in the control module memory.

These alarm causes can be read off using VADIS/VIDA PC via the VCT 2000.

NOTE: Alarm causes are erased at the same time as diagnostic trouble codes (DTCs).

Diagnostic trouble codes (DTCs) can only be erased when all diagnostic trouble codes (DTCs) have been read at least once. For each diagnostic trouble code (DTC), the frozen values for the following parameters can be read off:

The alarm causes that can be stored are

- door open.
- opened tailgate or rear door.
- hood open.
- movement in the passenger compartment (ultrasonic sensor activated).
- broken window (glass breakage sensor activated).
- car tilted (tilt sensor activated).
- ignition on (if the car has been hot-wired for example).
- fault in the power supply (if the battery leads have been cut or there is an open-circuit in the power supply to the siren).