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brens-s80

Volvo Guard Alarm problems

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hi all,

I have an ongoing intermittent problem with the Volvo guard alarm fitted to a 1997 S70. The alarm goes off for no obvious reason and resetting it from the keyfob may cure the problem for a few hours or even days. There is no pattern to its madness and once it even went off while i was looking at it from the house so this may rule out external influences.

How can i go about troubleshooting this problem ( eg disable the Ultra sonic section for a while to see if that is the problem area before moving onto say the door/boot sensors ) or indeed disable the alarm at night times , so the neighbours gets some sleep ?

TIA

brendan

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hi all,

I have an ongoing intermittent problem with the Volvo guard alarm fitted to a 1997 S70. The alarm goes off for no obvious reason and resetting it from the keyfob may cure the problem for a few hours or even days. There is no pattern to its madness and once it even went off while i was looking at it from the house so this may rule out external influences.

How can i go about troubleshooting this problem ( eg disable the Ultra sonic section for a while to see if that is the problem area before moving onto say the door/boot sensors ) or indeed disable the alarm at night times , so the neighbours gets some sleep ?

TIA

brendan

check for living creatures in the car first....

the sensors can be disabled, tells you how in the manual

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Its a well reported problem on the x70 series that leaving anything metalic in the ash tray or section below can trigger alarm, the coin holder is fine cos its rubber, but IIRC alam uses Microwaves so metalic objects in that area (poss sensor is located nearby) cause nusiance tripping of alarm

HTH

Ben

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yip lord B is correct, dont leave any coins or anything at all metallic in the area behind the coin holder (oddly enough the coin holder itself is fine to leave coins in)

also, the sirens have had problems too, and door switches also could be the reason (part of lock unit). as allways though the first thing to eliminate is the easiest, so remove anything from that tray

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hi and thanks

I've check the car for any unwanted free loaders before but found no evidence of any. I just tried disabling the internal sensors as per the owners manual ( press lock switch to lock for 3 or more seconds , doors should lock and then unlock ) , but doors dont lock/unlock , odd or a sign of a problem ?ohmy.gif.

The only thing in the ashtray was one of those micro-fibre cleaning cloths which i have removed to a side pocket and we'll see how it goes .

thanks again for the quick replies

brendan

yip lord B is correct, dont leave any coins or anything at all metallic in the area behind the coin holder (oddly enough the coin holder itself is fine to leave coins in)

also, the sirens have had problems too, and door switches also could be the reason (part of lock unit). as allways though the first thing to eliminate is the easiest, so remove anything from that tray

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are the indicators flashing when you arm the alarm? give the bonnet a slam & the boot :rolleyes:

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hi PNut,

yes the indicators flash alright and the boot and bonnet seem fine, though just to be sure I have slam'd them. Where are the sensors located for the boot and bonnet do you know ?.

thanks again

brendan

are the indicators flashing when you arm the alarm? give the bonnet a slam & the boot :rolleyes:

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the bonnet sensor is inside the nearside bonnet catch, you should have a couple of wires running from it... the boot i believe uses the 3 copper coloured electrodes next to the locking mechinism if that makes sense

if the lights are flashing when you arm the alarm then the bonnet & boot will be shut so that shouldnt be a problem

its weird that the internal sensors wouldnt disarm, you did have all the doors shut windows closed etc when you tried? also i think the keys have to be out the ignition.... or in a certain position

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another thing to check is that boot light comes on when opened and off when you close.

when alam has triggered, have a look through the windows to see if either of the front footwell lights are on, or the red maker lights on the back doors (you will see red glow at side of seat back), if so then whichever on is on that door lock is iffy.

but keys, coins etc in front are most likely suspects, also check for old coke cans etc under front seats, or anything else metalic.

ben

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I had the same problems with my P1. The new(ish) police radio system causes no end of trouble here, it may be something that you can't do anything about. The alarm going off at all hours of the night becomes very un-funny indeed!

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hi all,

just thought i'd let you know that having moved the items from the ashtray the alarm has not gone off one.

many thanks

brendan

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