Alarm System - How to test.

10 years 9 months ago - 10 years 1 month ago #11201 by David Aiketgate
The alarm system can be self tested as follows:-

Access to the self test facility is obtained as follows:-

(The steps 2 to 4, must be completed within 2 seconds, in order to induce the ECU to enter the self test mode. Any longer, and you will need to start again)

1) The vehicle must be in disarmed mode, unlocked and with the ignition switched off.

2) Lock the driver's door using the driver's door sill button.

3) Turn the ignition ON, OFF then ON again and leave it ON.

4) Unlock the driver's door using the driver's door sill button.

Confirmation that the test mode has been successfully entered is given by the horn sounding a short beep. Once in self test mode, the volumetric sensor (if fitted) is powered up and the vehicle is in an immobilised state.

If an ECU input is then seen to become active i.e. to go from an open circuit to a short circuit (or earthed) condition, the security LED will give a short flash to indicate this.

When the system is in the self test mode, operation of the appropriate switch by moving the associated panel or linkage will instigate the test on each of the following circuits;

1) Driver's door courtesy light switch.
2) Passenger door(s) courtesy light switch.
3) Bonnet open switch.
4) Boot open switch.
5) Driver's door key barrel switch. (Not on 100 models)
6) Boot key barrel switch (Not on 100 models)
7) Driver's sill button "up" switch.
8) Driver's sill button "down" switch.

Switch tests need not be made in any particular sequence and any or all may be tested as required.

Correct operation of the circuit being tested will be denoted by the single flash of the security LED and the same circuit may be tested repeatedly if necessary.
The self test mode can be terminated at any point by switching off the ignition.

Failure of the ECU to enter the test mode will probably indicate that it is not receiving inputs from either the ignition power supply or the driver's door sill button switches.


The test facility may also be used to check the operation of te volumetric sensor, either ultrasonic or Doppler microwave (if fitted), by performing the following;

With the system in self test mode and the remote handset previously programmed and synchronised to the vehicle being tested, press the unlock button once.
The ECU will now disregard inputs from it's associated switches, and will instead, give a confirmation flash on the security LED to indicate that the volumetric sensor has been triggered, the action of which can usually be induced by waving a hand in front of the sensor.
The self test mode can be terminated by switching off the ignition.

The following user(s) said Thank You: Leigh Ping, Rivers, west470, sworkscooper

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3 years 2 months ago #180639 by graham1
Hi David, I open and close my doors and get a repeated clicking sound , it is only when I do it 2 times ,could this be a bad earth, thank you.

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3 years 2 months ago #180644 by David Aiketgate
It's possible. also could be the double locking feature of the car's security system. From your description that could be what you are hearing.

However, multiple clicking when trying to lock/unlock is a sign of possible upcoming lock failure.

Usually known as the machine gun of death.


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3 years 2 months ago #180645 by graham1
Thank you. it is the first one thankfully, I have spares so it wont be a problem if something goes amiss thank you again for your quick response,

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4 months 2 weeks ago #193787 by C4ix
Hi tried several times to no avail I cannot get the alarm to test or the light to come on .Changed ecu,5as module and volumetric sensor according to the pscan the door switches are functioning any ideas????
regards John

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