Basic Components

Guard Alarm I Basic Components

Status Panel On LH Pillar:

1. Hood (bonnet) contact
2. Horn (or siren)
3. Status panel, located on A-post
4. Alarm control module
5. Remote control (infra-red or radio control)

1. Hood (bonnet) Contact





The LH hood (bonnet) catch has an integral contact which grounds when the hood (bonnet) is opened.

2. Audio/Visual Signal





When the alarm is triggered, it sets off a separate horn or siren and the car's turn signals (indicators) to attract attention.

3. Status Panel

Status Panel On LH Pillar:

The status panel has 2 red LEDs to indicate the alarm status: activated, service mode, programing mode etc. The status panel also has 3 red LEDs, each of which indicates a fault in its alarm loop, but also indicates if a door is open etc.

The LEDs Indicate:
I = sensor loop, doors
II = sensor loop hood (bonnet) and trunk (boot) lid
III = sensor loop, extra sensor (optional accessory)
There is also a function key used when programing the alarm, programing the key code and shutting off sensor loop III.

Indication when driving or after driving:
Status LEDs: no indication normally.
If service mode is activated, LEDs will flash briefly every three seconds.
Indicator LEDs: not on.

Fault in alarm loop after driving





Status LEDs: triple flash, three short pulses followed by a pause indicates a fault in one of the alarm loops.
Indicator LEDs: indicate which alarm loop is faulty.

NOTE: This fault indication will also appear if any of the doors, hood (bonnet) or trunk (boot) are open.

The alarm has been activated
Status LEDs: a brief flash every second.
Indicator LEDs: no indication.

The alarm has been triggered
Status LEDs: lit.
Indicator LEDs: no indication.

After turning the alarm off when it has been triggered





Status LEDs: no indication.
Indicator LEDs: indicate which alarm loop was triggered.

NOTE: Indication is reset when the ignition is turned on or the alarm activated.

The alarm is in service mode
Status LEDs: a brief flash every three seconds.
Indicator LEDs: no indication.

4. Alarm Control Module





The control module is installed on the relay plinth (position 210/211) in the passenger compartment fusebox. The sensor and indicator LED are connected to the control module via a separate lead to the top of the control module. The control module contains a pre-programed microprocessor which can be reprogramed for different functions. Among other things, it can hold up to three different key codes for remote controls.

There are three integral relays for:
Start inhibitor
Visual signal
Horn signal

Technically speaking, the control module communicates with the status panel by two leads; an incoming lead for the remote control code signals and function key; an outgoing lead for the LEDs. The control module communicates with all LEDs simultaneously. The signals have a code which indicates which LEDs are to be lit. This is the reason why the LEDs may flicker sometimes.

5. Remote control or door key





Operation is via the remote control. If the alarm was installed before 1994, it can also be operated using the standard door keys.

IR (Infra-Red) remote control





This remote control is black. The front end must be pointed at the RH window on the status panel, which is the IR receiver. The range depends on the ambient light levels, from approx. 0.5 meters in bright sunlight to approx. 5 meters in shadows. Some lights, such as fluorescent tubes, may cut down the range.

IR receiver





The intra-red receiver is built into the RH status panel window. The incoming series of IR pulses is sent on to the control module in the form of an electrical signal.

Radio control





The remote control is gray, and may have different colors on the center strip (depending on the radio frequency). The remote control can be used to operate the alarm from any angle up to approx. 30-40 meters from the car. The control range may vary if the radio signals are affected by the surroundings. Radio receiver signal is received by the status panel.

Remote control code





When the remote control button is pressed, it generates a special code which is transmitted by radio or IR. The code signal consists of a 32-bit binary code, which allows for up to 4 million combinations. Keep the button pressed down and the code will be sent over and over again, as a so-called series of pulses. As supplied, both remote controls in the set have the same code.


Sensor
The following sensors are available as options for the alarm:
Window sensor
Ultrasound sensor
Level sensor

NOTE: Up to 2 sensors can be connected at one time.