Door, luggage compartment and engine hood switches
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Door, luggage compartment and engine hood switches
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Door and luggage compartment switches
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The switches (for interior lighting) are included in the theft alarm as sensors for doors and tailgate. The switches are mounted in the body. in the middle of each door and the tailgate. All door switches are connected to the alarm control module (pin 4) via the car's ICE control module. The luggage compartment switch is connected directly via the car cable assembly to pin 3 on the alarm control module. The control module then senses if a door is opened when the alarm is armed by monitoring the voltage over the switch as follows:
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Voltage across the switch and ground should be +12 V when the door/tailgate is closed.
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The switch closes to ground when the door/tailgate is opened. The voltage across the switch and ground is then 0 V. The alarm will go off.
The electronic control module senses via pin 18 whether the driver's door is open or not and if it is prevents the alarm from being armed.
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The engine hood switch is located beside the electrical distribution box in the engine compartment and is included as a sensor for the hood. The switch is connected to the control module (pin 16).
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Voltage across the switch and ground should be +12 V when the bonnet is closed.
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When the hood is opened, the switch is grounded. The voltage between the switch and ground is thus 0 V. The alarm is set off.
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