15 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAlarm issue! Any help much appreciated.
Reported or suspected cause
alarm
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
As I said, in my particular case it was the alarm, it has a backup battery that has a lifespan and is not serviceable.
Leading evidence: 'alarm' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'alarm' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check codes and get a code' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
For me, it was the alarm, siren / tilt sensor unit.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
I've had a battery drain in the past which has been green funky oxidisation on the socket of the tilt sensor, so cleaned all the pins up and covered in Vaseline.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
I only changed the siren / tilt sensor unit (the second pic).
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
1
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Suspected cause · Original poster
A lot of codes, wondered if this was caused by a low battery - checked and it's at 11.6V which is a little low so charged it up overnight last night and refitted this morning - and the alarm immediately goes off again!!
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I've had a battery drain in the past which has been green funky oxidisation on the socket of the tilt sensor, so cleaned all the pins up and covered in Vaseline.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
Been on a nice road trip in Scotland (just under 1000 miles covered) and in daily use the alarm hasn't misbehaved once - maybe pointing to a battery issue?
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause · Original poster
A lot of codes, wondered if this was caused by a low battery - checked and it's at 11.6V which is a little low so charged it up overnight last night and refitted this morning - and the alarm immediately goes off again!!
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Hi All.
Bit of history.
When I bought my '00 C2 the key fob didn't work. No problem, open the door via the key and pop the key in the ignition nice and quick. Bit of a pain but liveable.
After a few years of this decided to splash out on a new remote key fob - happiness and joy! Remote central locking working perfectly.
Maybe 18 months ago I started to get a double beep when I locked the car. Locking seemed to work fine, so put it on the 'to do' list and never got round to fixing anything.
a few months ago alarm starts going off in the middle of the night. no lights, so I actually thought it was someone else's car. This happens rarely every few months, annoying but no obvious cause. I check the codes and get a code:
34 - passenger compartment monitoring sensor
Happily thinking this was my issue I purchase a second hand dome light thingy. Numbers all match, fit the new part, still get a double beep when locking.
Clearly not the issue, decide to refit the original part to see if the codes come back.
Recently (last few weeks) the car has been going berserk whenever I unlock it with the fob - unlocks perfectly happily but sometimes the alarm will immediately go off, sometimes when I open the door, it will stop and start three of four times even when I've started the engine! Clearly the immobiliser if not stopping the car from starting.
Read the codes over the weekend and got a good selection:
1 - Door(s) secured and terminal 15 on
34 - Passenger compartment monitoring sensor
43 - Passenger side release stuck
49 - K Lead
61 - Central locking limit position Unlock not reached
Cleared these and old faithful (number 34) came back after a lock/unlock/double beep.
A lot of codes, wondered if this was caused by a low battery - checked and it's at 11.6V which is a little low so charged it up overnight last night and refitted this morning - and the alarm immediately goes off again!! Battery is pretty new.
I think that is pretty much the full experience.
Having read through all of this I might try refitting the replacement passenger sensor to see if it clears up my alarm issue. But other than that I'm a bit lost!
1, 43 and 61 suggest a micro switch issue in the passenger door latch - it thinks the door is still locked when it isn't. The door latches are shared with the Mk1 Audi TT and they're generally cheaper than ones pulled from 986/996.
Here's the part, doubt you'll get it cheaper:
NEW PORSCHE 911 (996) / BOXSTER (986) PASSENGER FRONT DOOR LOCK ACTUATOR 98-04 | eBay
BRAND NEW AFTERMARKET OE QUALITY PART TO FIT: - PORSCHE 911 (996) MODELS FROM 1998-2004. - PORSCHE BOXSTER (986) MODELS FROM 1998-2004. **9-PIN PLUG TYPE.
www.ebay.co.uk
Yep bought a pair. I'm confused as to how this will resolve the alarm going off when I unlock the car though but for £50 it's worthwhile as a roll of the dice ..
It sorted my car out that had similar problems. I think the faulty door micro switches activate at night as temperatures cool and that triggers the alarm.
Also, any moisture getting in there causes the microswitches to give false open/close signals. I had an issue with the window drop microswitch on the passenger door handle and the window would constantly do the up/down/up/down manoeuvre.
I had this issue. For me, it was the alarm, siren / tilt sensor unit.
I went through the micro switches and all confirmed as working. In the end bought a second hand alarm unit and it’s all gone (touch wood - 2 years and counting).
As I said, in my particular case it was the alarm, it has a backup battery that has a lifespan and is not serviceable. Once it gets beyond its life, it double chirps to let you know it’s about to stop working. Then alarm goes full ballistic and you have to disconnect the battery to stop it.
It’s the easiest thing to replace, and cost £35 or so.
Interesting, is the alarm unit the bit under the bonnet? Might look in to this. My buddy is an electronic engineer so he might be able to have a poke around and find out if any components are lifed out...
The alarm unit is under the passenger seat. Easy to get access to, just undo the 2 front bolts out the seat rail and tilt the seat back. Then remove the cover off the alarm unit. Under the bonnet on the passenger side of the battery is the tilt sensor and siren. I've had a battery drain in the past which has been green funky oxidisation on the socket of the tilt sensor, so cleaned all the pins up and covered in Vaseline.
Alarm CU inder passenger seat:
Tilt sensor (opaque white box full of fluid - don't drain that out, it's not full of water) & siren (big red nose):
Interesting guys thanks. Door bits have turned up so looking to fit these on Friday.
Been on a nice road trip in Scotland (just under 1000 miles covered) and in daily use the alarm hasn't misbehaved once - maybe pointing to a battery issue? However a couple of times the dome light has refused to turn off when the door was closed which does point to a microswitch issue... Either way I'm happy I'm replacing the locks (and the door membrane while I'm there.
Will have a good look at the alarm and the siren to see if there are anything obviously wrong.
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