| Description and Operation Vehicle built up to 01/1999 The anti-theft alarm/double locking module is located at the base of the A-pillar behind the floor covering. The module controls the anti-theft and double locking systems. For Diagnosis and Testing of the anti-theft alarm system. For vehicles built up to 01/1999. For additional information, refer to Section 419-01A Anti-Theft - Active / 419-01B Anti-Theft - Passive. For Diagnosis and Testing of the double locking system. For additional information, refer to Section 501-14A Handles, Locks, Latches and Entry Systems / 501-14B Handles, Locks, Latches and Entry Systems. Vehicles built 01/1999 onwards The GEM is located at the base of the A-pillar behind the lower left hand side of the instrument panel. This module carries out the functions of the anti-theft alarm and double locking module and the central timer module (CTM). For Diagnosis and Testing of the anti-theft alarm system. For vehicles built 01/1999 onwards. For additional information, refer to Section 419-01A Anti-Theft - Active / 419-01B Anti-Theft - Passive. | 
