Components

The alarm system is managed by the alarm control unit M30.

The control unit is supplied directly by the battery at pin 3 of connector A and at pin 7 of connector B via the line protected by fuse F15 of the junction unit B1. Fuse F15 is supplied by the battery via the 60A maxifuse housed in B5.

The supply controlled by the ignition (15/54) reaches pin 12 of connector B of control unit M30 via the line protected by fuse F21.

Pin 9 of connector A is earthed at C10.

The control unit M30 controls the closure of the doors via switches I16 and I17, whilst t6he bonnet and boot lids are controlled by switch I10 and contact board D85, respectively.

The operating logic is as follows:

• If a door is opened, the relevant switch I16 or I17 sends an earth signal to control unit M30 via pin 8 of connector B (the same switches light up the courtesy light; Wiring diagram E2510 ROOF LAMP );
• If the bonnet lid is opened, the switch I10 sends an earth signal to the control unit at pin 18 of connector B of control unti M30;
• Lastly, if the boot is opened, the S witch in the tailgate contact board D85 sends an earth signal to pin 17 of connector B of the control unti M30. Switches I10, I16 and I17 lead to earth C10, whilst the contact board D85 leads to earth C30.

Pin 1 of connector A of M30 sends a control signal to alarm LED E40 pin 1, whilst pin 2 of alarm LED E40 is connected to earth C10.

Pins 1 and 2 of connector B of M30 produce control signals for the direction indicators Wiring diagram E2020 TURN/ HAZARD LIGHTS .

The autodiagnostic data can be read by connecting to connector R10; the control unit sends diagnostic signals to connector R10 via pin 6 of connector A of M30.

The receiver for the remote control M35 is supplied directly by the battery at pin 3 from the line protected by fuse F15 and at pin 7 from the line controlled by the ignition (INT) protected by fuse F22; both fuses are located in junction unit B1.

Pin 4 of M35 is earthed at C10.

M35 (pins 5 and 6) issue door lock and door release signals Wiring diagram E3040 DOOR LOCKING DEVICE.

The control unit M30 and the receiver M35 are connected via a serial line from pin 2 of connector A of M30 to pin 2 of M35.

COMPONENTS