Is there anyway to pull DTC's without any comms? i can do it on a vauxhall astravan pedal trick but is it possible with a VAG? i do have access to a snapon ethos but cant drive the car till i can tax it sunday.

 

Now apparently the seller neglected to tell me that the car has some alarm problems which apparently is caused by the inner moon roof screen magically creeping by itself (defying laws of physics) and then setting the alarm off.

 

WTF.   anyone got a clue where to start looking to solve this?

 

 

Assume you mean the horizontal 'blinds' for the panoramic roof?

 

The catches in them wear over time and they (the blinds) do break free and retract of their own accord, usually in hot weather in my experience.

 

IIRC the internal alarm sensors sensitivity can be adjusted with VCDS.

many thanks again.  are the catches replaceable or renewable?

Hi Loony and welcome to Briskoda.

 

I never had this problem on my Roomsters.  But then I never closed the blinds!

The Pano roof was just one of the many features I loved (and still miss) about my Roomsters.

 

Some useful information in this thread.  Hope it helps:

 

 

Edited 29 June, 20188 yr by Robjon
Spelink

thanks will have a read up.

No pano roof on mine, but faulty interior lights switch did cause unexpected alarm triggerings.

There's a red light switch jobbie in the driver's door on mine, gather you can use it to de-activate the internal movement sensors part of the alarm, so that, for example, you can lock the car (presumably with a window ajar?) whilst you've left a pet or child or older person in and don't want them "escaping" while you do a short errand....

Check in owner handbook for various alarm features.

@loony - Just read this; AIUI if you lock with the key you can activate the perimeter alarm but disable the volumatic.

We have a persistent alarm fault with our Roomster  that has bothered us for the whole time we have owned the car. The car is still under warranty but would really appreciate some advice if anyone has had similar experiences.  

 

Car is 13 plate, brought from Skoda dealer last year as used approved. Siren sounds, but does not flash hazards or log going off.  (We brought a webcam to record this)

 

 

Local Dealer have had car a few times and have been helpful (although my wife who mainly uses the car is really annoyed.)

 

Here is what local dealer have done:-

 

Visit 1: 26/04/18 Checked for any stored fault codes using guided fault finding, found that no relevant codes were logged. The vehicle stores the last 4 triggers and also the alarm type. When queried it showed that the car was fully locked and that the Ultra Sonics were responsible for the last 4 triggers. Given the lack of any stored electrical fault we decided to lower the ultra Sonic sensitivity by 50% in case an out side influence was triggering them. We then set our own alarm trigger so we could clearly see what triggers the alarm should the problem reoccur. We left the vehicle in the workshop overnight and in the morning rechecked the list of triggers and concluded it had not activated overnight.

 

Visit 2: 24/05/18 Checked for any stored fault codes using guided fault finding, found that no relevant codes were logged. Locked the car for an extended period and again confirmed that during the testing time no faults or triggers had logged.

 

Visit 3: 09/07/18 Checked for any stored fault code using guided fault finding, found that no relevant codes were logged, however it was determined that 1 trigger was present, again for Ultra Sonics. Due to lack of supporting evidence we were unable to go ahead and replace the Ultra Sonics. We left the car in the workshop for testing from 10am Monday until 10am Friday, the alarm never sounded and no extra triggers were logged. We then left the car outside from 3pm Friday until 2pm Tuesday. When checked again the car still showed no triggers and we did not hear any alarm in this time. It was concluded that this may have been due to outside influences and may not be relevant to the on going complaint. The customer at this point had reported far more than 1 trigger. At customers request we disconnected the Ultra Sonics and returned the car.

 

Visit 4: 29/08/18 Customer provided extra detail when dropping off, we were informed that when the alarm sounds the hazard lights do not flash. This information along with the latest guided fault finding logs (again showing now faults and no triggers) was forwarded to the VW Group Technical Team via a DISS report, we were advised to replace the on board power supply control unit that contains the alarm system. We replaced this, reconnected the ultra Sonics. Locked the car for an extended period and again confirmed that during the testing time no faults or triggers had logged. Believing the car to now be fixed due to the Technical Teams advice, it was returned to the customer.

 

Visit 5: 03/10/18 Customer informs us that the fault still persists as before, the siren sounds and no lights flash. Carried out guided fault finding and this time the 1st electronic fault was logged, a sporadic electrical fault was showing with the alarm siren unit, we replaced the unit and as with all previous visits we left the car locked for testing purposes, both inside and outside. We checked for any triggers or further electrical faults and confirmed again that nothing was logged. 

 

Visit 6: 22/10/18 Car returned to workshop to have a washer hose repair, whilst in we checked the alarm sources and fault memory and confirmed them to still be clear. Car returned to customer and at time off writing, no further alarm activations have been reported since visit 5.

 

 

Since the last visit, alarm did not sound for 3 weeks, we thought garage had cracked it, but it went off twice this weekend both at around 0300-0400am!!!

 

 

Any ideas?

 

2 hours ago, Hippopotamus said:

We have a persistent alarm fault with our Roomster  that has bothered us for the whole time we have owned the car. The car is still under warranty but would really appreciate some advice if anyone has had similar experiences.  

 

Car is 13 plate, brought from Skoda dealer last year as used approved. Siren sounds, but does not flash hazards or log going off.  (We brought a webcam to record this)

 

 

Local Dealer have had car a few times and have been helpful (although my wife who mainly uses the car is really annoyed.)

 

Here is what local dealer have done:-

 

Visit 1: 26/04/18 Checked for any stored fault codes using guided fault finding, found that no relevant codes were logged. The vehicle stores the last 4 triggers and also the alarm type. When queried it showed that the car was fully locked and that the Ultra Sonics were responsible for the last 4 triggers. Given the lack of any stored electrical fault we decided to lower the ultra Sonic sensitivity by 50% in case an out side influence was triggering them. We then set our own alarm trigger so we could clearly see what triggers the alarm should the problem reoccur. We left the vehicle in the workshop overnight and in the morning rechecked the list of triggers and concluded it had not activated overnight.

 

Visit 2: 24/05/18 Checked for any stored fault codes using guided fault finding, found that no relevant codes were logged. Locked the car for an extended period and again confirmed that during the testing time no faults or triggers had logged.

 

Visit 3: 09/07/18 Checked for any stored fault code using guided fault finding, found that no relevant codes were logged, however it was determined that 1 trigger was present, again for Ultra Sonics. Due to lack of supporting evidence we were unable to go ahead and replace the Ultra Sonics. We left the car in the workshop for testing from 10am Monday until 10am Friday, the alarm never sounded and no extra triggers were logged. We then left the car outside from 3pm Friday until 2pm Tuesday. When checked again the car still showed no triggers and we did not hear any alarm in this time. It was concluded that this may have been due to outside influences and may not be relevant to the on going complaint. The customer at this point had reported far more than 1 trigger. At customers request we disconnected the Ultra Sonics and returned the car.

 

Visit 4: 29/08/18 Customer provided extra detail when dropping off, we were informed that when the alarm sounds the hazard lights do not flash. This information along with the latest guided fault finding logs (again showing now faults and no triggers) was forwarded to the VW Group Technical Team via a DISS report, we were advised to replace the on board power supply control unit that contains the alarm system. We replaced this, reconnected the ultra Sonics. Locked the car for an extended period and again confirmed that during the testing time no faults or triggers had logged. Believing the car to now be fixed due to the Technical Teams advice, it was returned to the customer.

 

Visit 5: 03/10/18 Customer informs us that the fault still persists as before, the siren sounds and no lights flash. Carried out guided fault finding and this time the 1st electronic fault was logged, a sporadic electrical fault was showing with the alarm siren unit, we replaced the unit and as with all previous visits we left the car locked for testing purposes, both inside and outside. We checked for any triggers or further electrical faults and confirmed again that nothing was logged. 

 

Visit 6: 22/10/18 Car returned to workshop to have a washer hose repair, whilst in we checked the alarm sources and fault memory and confirmed them to still be clear. Car returned to customer and at time off writing, no further alarm activations have been reported since visit 5.

 

 

Since the last visit, alarm did not sound for 3 weeks, we thought garage had cracked it, but it went off twice this weekend both at around 0300-0400am!!!

 

 

Any ideas?

 

Mine hasn't gone off now since i heard there was a problem.

 

i have a reliable interior sensor you can borrow if you would like to test it against yours? PM me if you are interested and for the price of postage  I will send  it to you, however i would like it back once you have finished.

 

I leave the pano roof blinds open all the time. the catch is loose but i havent got round to testing or fixing that yet.

 

Strange as it may seem and because you sound like you are clutching at straws, i have heard with intermitent alarm problems:

 

There could be a posibility of Air vents being open causing the sensor to activate.

Bugs inside the car, spiders,etc.

Temperature changes that cause plastic and other materials to creak or move, there is normally a significant temp drop around 3am in the UK.

Knackered main Battery. do a load test and get an AMP reading not only voltage.

 

If the car has been steam cleaned under the bonnet,

Corroded wiring around battery terminals, mainly earth terminals causing voltage changes.

Corroded fuse board and fuses.

If there is a backup battery in the siren box(i dont know) look at changing it for a fresh highest quality branded battery you can get.

Check that previous owner did not cut into the loom(made a hash of it) for aftermarket stereo fitment etc.. again bad connections causing voltage changes.

 

Faulty hazard warning switch

 

As i say possibilitys...........

 

 

 

 

 

Edited 11 November, 20187 yr by loony

http://briskoda.net/forums/topic/458203-roomster-siren-sounds-for-no-reason

 

44 minutes ago, loony said:

Mine hasn't gone off now since i heard there was a problem.

 

i have a reliable interior sensor you can borrow if you would like to test it against yours? PM me if you are interested and for the price of postage  I will send  it to you, however i would like it back once you have finished.

 

I leave the pano roof blinds open all the time. the catch is loose but i havent got round to testing or fixing that yet.

 

Strange as it may seem and because you sound like you are clutching at straws, i have heard with intermitent alarm problems:

 

There could be a posibility of Air vents being open causing the sensor to activate.

Bugs inside the car, spiders,etc.

Temperature changes that cause plastic and other materials to creak or move, there is normally a significant temp drop around 3am in the UK.

Knackered main Battery. do a load test and get an AMP reading not only voltage.

 

If the car has been steam cleaned under the bonnet,

Corroded wiring around battery terminals, mainly earth terminals causing voltage changes.

Corroded fuse board and fuses.

If there is a backup battery in the siren box(i dont know) look at changing it for a fresh highest quality branded battery you can get.

Check that previous owner did not cut into the loom(made a hash of it) for aftermarket stereo fitment etc.. again bad connections causing voltage changes.

 

Faulty hazard warning switch

 

As i say possibilitys...........

 

 

 

 

 

That’s a really kind offer for the interior sensor loan, but given the alarm itself not triggering (only the siren sounding) it seems less likely to be a faulty sensor. A lot of sensors have been disconnected and siren still sounds.

 

Battery voltage issues seem most likely, but being intermittent (and not triggering any maint codes) it’s so hard to diagnose.