Anti-Theft Alarm System

Anti-Theft Alarm System

• Additional information:

refer to the Owner's Manual.

General Description

Functions of the anti-theft alarm system are integrated in the Comfort System Central Control Module (J393).

After replacing the Comfort System Central Control Module, the anti-theft alarm system must be adapted. Refer to => [ Comfort System Central Control Module J393 ] Scan Tool Testing and Procedures.

• If the Comfort System Central Control Module is to be replaced, the work procedure => [ Replacing/Coding ] Replacing/Coding to read out the codes stored in the module must always be performed.

• After replacing the Comfort System Central Control Module, other functions of the Comfort System Central Control Module such as "anti-theft immobilizer", "anti-theft alarm system", "access/start authorization", "tire pressure monitoring system" and central locking system key must also be adapted, depending on vehicle equipment.

• For these, start with adaptation of anti-theft immobilizer (=> [ Anti-Theft Immobilizer Control Module J362, Adapting ] Anti-Theft Immobilizer Control Module J362, Adapting) and then the other, equipment-dependent functions of the Comfort System Central Control Module in any sequence.

DTC Recognition and Display

Anti-theft alarm system is equipped with On Board Diagnostics (OBD) which assists troubleshooting.

The "Guided Fault Finding" function is to be used for troubleshooting of the systems as described in => [ Vehicle Diagnosis, Testing and Information Systems ] Vehicle Diagnosis, Testing and Information Systems.

• After the anti-theft alarm system has triggered, the alarm source, which is stored in Comfort System Central Control Module, can be checked. Refer to => [ Anti-Theft Alarm System, Checking Alarm Sources ] Anti-Theft Alarm System, Checking Alarm Sources.

• After Alarm Horn (H12) has triggered, the alarm source, which is stored in the Comfort System Central Control Module, can be checked. Refer to => [ Checking Alarm Sources For Alarm Horn ] Checking Alarm Sources For Alarm Horn.