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post #6 of 8 (permalink) Old 2nd August 2006
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Most alarms allow themselves 30 second to a minute to stabilise before arming the ultrasonic sensors. Are you giving it enough time?

The best way to test is to lock the car with one of the windows open. Return to the car after a few minutes and put your arm through the window. This should trigger the ultrasonic detection and set off the alarm.

If the lights then do four flashes when you unlock, you've probably hit the jackpot. I'm pretty sure my phase 2's alarm beeps four times if the ultrasonic has been set off (from repeated experience of loading the little 'un in the car, walking back inside to get something, and the hands-free locking kicking in.)

I'd go out and check for you, but I've still got this poxy Astra loan car Oh well, at least I don't have to get my own car mucky doing the tip run
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post #7 of 8 (permalink) Old 2nd August 2006 Thread Starter
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Faulty Alarm


Tried to get the Ultrasonic sensors to operate but to no avail. Can see the little blighters on the back quaterlights ok, waited several minutes stuck my head and arm through an open rear window with doors locked, but no alarm triggered. Perhaps they have been disabled before I picked up this motor.
Rang up a local dealer to get some advice (useless). Suggest I book the car in, but unable to see for 2 weeks. Taking it to a dealer, might as well as give them a blank check as alarm sometimes dosn't go off for several hours. Can envisage changing one sensor after another!!!!!
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post #8 of 8 (permalink) Old 15th May 2007
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Talking Fault Alrm Fix

Hi, I had the same problem with my Renault Trafic, see below to fix your car!

When the van is locked up the factory fitted alarm goes off without an obvious disturbance.


I found the answer!

When you open the bonet of the renault trafic van, you will find a black plastic nipple that makes contact with the press to make alarm switch just to the right of the bonet release lever.

This plastic nipple comes loose over time and goes off alignment with the alarm switch when the bonet is in its closed position. (Hence not creating continuity in the alarm circuit and it going off.)

To fix the problem, simply retighten with your fingers (FINGER TIGHT) HINT: I put a dab of tip ex on the switch spindle, and closed the bonet to make sure it made contact with the Plastic nipple. It now works PERFECTLY, and I saved myself a big bill from a RENAULT MAIN DEALER!
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