Alarm

[Ashbandicoot]

I have a 97 Z3 with the 3G EWS alarm, which seems to be triggering itself..

I thought i had fixed the issue by wiping the windscreen mounted sensors, but it woke me up at 2am with no apparent reason.

Hoping someone will suggest a simple cause? I don't really want to leave it without the alarm set

cheers

Ash

 

[GazHyde]

Have you checked out the bonnet switch? I believe you can disconnect the switch overnight and that should tell you if it's that.

 

[jonco]

Have you checked out the bonnet switch? I believe you can disconnect the switch overnight and that should tell you if it's that.

Agree - I am currently investigating similar problem on mine. This is part one of process of elimination.
Not sure what you mean by `wiping sensors' but they can be over-ridden using the LED pushbutton on console.
Is it parked outside? Neighbourhood cat jumping on roof/bonnet can trigger alarm - or if it's on a road other cars racing past can be enough.

 

[Ashbandicoot]

I will investigate this evening, the boot loom was in tatters and has only been been fixed temporarily until I get some connectors.

The LED button was news to me, I thought it only flashed, so it turns out these were switched off.

I locked it using the key last night so I shall test it alarmed this eve once I have done a better repair of the boot loom.

Where abouts is the bonnet switch Gaz? Sorry if that is an obvious question..

Cheers

Ash

 

[Aceman]

It is on the front slam panel just to the right of the radiator above the headlight. It is pretty easy to pop the connector off if not slightly fiddly due to small gap between headlight and slam panel.

 

[jonco]

...............The LED button was news to me, I thought it only flashed, so it turns out these were switched off.

Not necessarily - I'll send you a pm with some manual info.

 

[Fender2004]

I had the same problem and all I did was to apply a round padded sticker onto the top of the bonnet switch, which pushed the switch down just that little bit further to make a better contact.

 

[jonco]

I had the same problem and all I did was to apply a round padded sticker onto the top of the bonnet switch, which pushed the switch down just that little bit further to make a better contact.

Have just been checking my bonnet switch out due to alarm going off with only the slightest touch on the bonnet. Have followed the suggestion of @Fender2004 but I have stuck the pad on the underside of the bonnet - now working Ok.
A couple of questions arise from checks:
1. There is an drilling on the underside of the bonnet which lines up with the top of the switch plunger - should there be a rubber buffer or similar in this hole?

2. With the bonnet open, I held the switch plunger down and set the alarm. I then slowly reduced the switch plunger and alarm did not initiate until the plunger was almost fully released.Is this normal or is it time for a new switch?

 

[Fender2004]

Just had a look at my car and the only rubber buffer is on the bonnet catch so that the leaver doesn't hit the underside of the bonnet.
If you need a new switch I bought one from the dealers last year and I think it was about £ 17. But if it now works why bother.

 

[Ashbandicoot]

Just an update, after repairing the severed boot loom the alarm seems to be working fine - no more 2am wake up calls

Ash

 

[t-tony]

Nice one Ash, a common problem apparently. I checked mine when I had central locking fault last year but in the end it was the n/s door solenoid.

Tony.