Alarm issue

SGH · 22 Jul 2018

Usually park my 997 in my garage so never lock it but left it out last night. Woken 4 times with alarm going off so ended up leaving it unlocked, could this be a battery issue ?

deMort · 22 Jul 2018

If it was the battery going flat then you would struggle to start it in the mornings.

Perhaps look in the ash tray and center consol cubby and remove any coins or metal in there .. if the fault persists ill go into a few possible other things .

SGH · 22 Jul 2018

Thanks, ashtray etc empty.

deMort · 22 Jul 2018

Ok if no coins in the ashtray then its not going to be the interior monitoring signal being interferred with .

next step really is a tester connected and look at the last 10 alarm triggers , not sure if durametric covers this so it may be a garage job with their tester to check this.

This will say what has triggered the alarm.

The alarm is sensing something it doesnt like after about 2 hours so interior monitoring or alarm siren spring to mind , siren has an inbuilt battery .. these can fail .. interior monitoring and its normally coins in the ashtray although the unit can fail.

SGH · 22 Jul 2018

Thank I have warranty so might call up Tonbridge and book it in but will leave it out tomorrow ands see if it goes off again.

I had left my mobile phone inside under radio could this be the issue ?

Teffers · 22 Jul 2018

SGH said:
Thank I have warranty so might call up Tonbridge and book it in but will leave it out tomorrow ands see if it goes off again.

I had left my mobile phone inside under radio could this be the issue ?

Definitely possible.

TTW · 24 Jul 2018

I had a similar problem in the hot weather last summer, the alarm suddenly started going off for what appeared to be no reason? - I confirmed it was related to the interior sensor by locking it with the interior sensor disabled (two quick succession clicks of the key to lock it.) - when the interior sensor was disabled, the problem didn't occur. I locked it this way for a few weeks in reality, assuming I would have to get the interior sensor replaced (under the handbrake) - but then one day decided to try lock it normally (with sensor enabled) - and bizarrely its all fine again? - I expected it to start messing around again with the all the warm weather we're having in the UK currently, but so far so good?!

Hope this makes sense.

Trevor.

deMort · 24 Jul 2018

Anything that can move in the car .. air freshener for example can trigger the inteior monitoring .. coins in the ashtray is another .. it deflects the signal.

Anything that transmits is another possibility .

Sometimes it is the sensor but its a bit unusual to have it go faulty.

VPD255M · 24 Jul 2018

Teffers said:
SGH said:

Thank I have warranty so might call up Tonbridge and book it in but will leave it out tomorrow ands see if it goes off again.

I had left my mobile phone inside under radio could this be the issue ?

Click to expand...

Definitely possible.

This.

I had ongoing alarm issues a couple of years ago, in the end found it was caused by leaving my phone in the car. I don't leave my phone in the car anymore and not had the problem since.

SGH · 25 Jul 2018

Still not had any time this week to try as it all tucked away in my garage. I will try with and without my phone in it first to see if this was the cause, thank for the replies. :thumb:

Poker2009 · 26 Jul 2018

You need one of these:

Interior Monitor Alarm Sensor p/n 997.618.210.01

Alarm issue

SGH

Nurburgring

deMort

Monaco

SGH

Nurburgring

deMort

Monaco

SGH

Nurburgring

Teffers

Spa-Francorchamps

TTW

Trainee

deMort

Monaco

VPD255M

Trainee

SGH

Nurburgring

Poker2009

Suzuka

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