The problem gets even more frustrating at night when people are sleeping, and suddenly your car alarm goes off without any apparent reason. Why does this happen? It is not necessary that your car is being robbed, sometimes faulty installation or other reasons also cause the alarm to go off, and in this article, we will discuss some of the common causes to help you figure out and fix the issue.
There are a lot of different possible causes for a car alarm which keeps going off. Remember that you first have to consider which type of car alarm you have. There is a big difference between a car alarm on older cars which is installed out of the factory and a newly integrated alarm in newer cars. If you have a newer car, the best way to locate car alarm issues is by checking the trouble codes in the car alarm control unit with an OBD2 scanner.
Cheaper OBD2 scanners do often not have the ability to read other trouble codes other than from the engine control unit. Get a more advanced one or let a workshop check the codes for you. Here is a list of the best OBD2 scanners to buy. You can check and replace the essential key fob batteries or reset the device to fix the problem. When you have replaced the batteries and you have communication problems, you may have to reprogram your key fobs in some situations. Besides alerting you about thieves breaking into your car, the car alarm also warns you about low battery level.
If your battery is about to die and you switch on the engine, the alarm will go off, indicating low battery level. Check the car battery with a multimeter. If the reading shows less than A sensitive shock sensor tends to trigger the alarm even if a dog or a cat gently touches your car.
If the alarm keeps beeping now and then, it will drain the battery sooner than you think. The shock sensor can be easily configured by twisting it. Modern vehicles are equipped with a hood latch sensor which triggers the alarm if someone is trying to force open the hood of your car.
To fix this problem, locate the sensor and have it cleaned. If after cleaning the latch sensor, you can still hear the alarm sound; it is possible that has someone tried to tamper with the sensor or the sensor is not installed correctly. You can find the hood latch sensor located near the headlights.
Cleaning the latch sensor is relatively simple. You will require a brake cleaner, cleaning brush and a microfiber towel. Start with locating the sensor and make sure you have removed the negative terminal of the battery first.Audi A4 B6 Benzin Kapağı Kilit Motor ve Alarm Sireni
Once the sensor is located, unplug it and check for any signs of damage or dirt. Spray the brake cleaner on the sensor and make sure all the dust and contamination is removed. Using the brush, gently remove any residual parts and finally, using a microfiber towel, wipe the sensor to make sure it is perfectly clean. Rusty battery terminals cause the battery to supply power unevenly throughout different electrical components in the car.
In such a case, the alarm sensor will think that the battery level is low and set off the alarm. You can clean the rusty battery terminals using a battery cleaner. If you have recently installed a new car alarm system and you noticed that the alarm keeps going off for no reason, it may be because of incorrect installation. If you have a digital multimeteryou can check whether each wire is receiving enough power and diagnose the problem quickly.Log in or Sign up.
DIYnot Forums. Audi A4 alarm problems Hello peeps, I own an immaculate A4 - it is a low mileage 2litre sport petrol model twice in the last 12months it has had a flat battery, usually after 4 - days inactivity. Battery and alternator check out fine and remembering to run it for 10mins every 3 or 4 days seems to work. It seems to me and lots of websites that Audis suffer from various glitches that can drain the battery.
One in particular is the alarm system!
Audi A4/B6 Alarm Siren - Replace NiMH Batteries
Apparently it has a rechargeable battery that eventually fails. I note my car is doing this "beeping" repeatedly! Do I assume that this may be the cause of battery drain? If so can I "electrically" disconnect the alarm without affecting any other system????
I know their are guides to DIY replace the batteries which I may consider eventually, but my immediate concern is stopping the constant flat batteries!
I am away from home for long days and am concerned my wife has un-reliable transportation Thanks for reading. Personally I would think twice about disabling any factory fitted, original equipment, alarm as this might impact on any insurance claim if the vehicle was stolen whilst disabled.
Short term probably best option would be to start the vehicle each day until alarm batteries can be changed or fit a small trickle charger to the battery. AlanE7 May How old is the car battery? If you can keep it charged enough to start by running it for 10 mins every three or four days it sounds as though your battery is well down on capacity.
Did you have it checked with a load tester? Maybe if the boot closed switch is playing up the alarm could be beeping to indicate this.
A4 Cab, Alarm Gremlins
Its virtually impossible to disconnect a modern vehicle security system. Belle7 May You must log in or sign up to reply here. Show Ignored Content. Related Threads. Audi A4 1. Replies: 23 Views: Mottie 8 Oct at PM. Replies: 3 Views: Burnerman 1 Feb Replies: 9 Views: Burnerman 9 Nov Remember me.
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If you're new to forums in general, be sure to check out the Forum FAQ. To start viewing posts, select the forum section that you want to visit from the selection below. Page 1 of 2 1 2 Last Jump to page: Results 1 to 40 of Thread: Alarm going off when I lock car - what gives? Thread Tools Show Printable Version. My Photo Gallery: 0. My Classifieds: 0. Alarm going off when I lock car - what gives? Guest-only advertisement. Register or Log In now! This has gone from randomly occurring to every time now - I cannot lock my car now without the feeble alarm beeping going off.
Worse - it doesn't stop when I hit the unlock button on the remote or put the key in and unlock the car. It seems to eventually time-out while I'm fumbling around trying to get it to stop. Nothing helps. What am I missing here? It has two switches adjacent to the trunk release switch - doesn't seem to matter if I activate them or not my understanding is that when I click them and red LED lights up that means that the relevant alarm sensor is deactivated It could possibly be a faulty door latch.
The electronics inside the switch can go bad and cause the alarm to go off at "inappropriate" times.
Offering performance and repair services for European vehicles. Are you a DIY'er? We offer OEM and aftermarket parts available for walk-in purchase or we can ship right to your door. But wouldn't that show up as a "door ajar" warning?
All doors, trunk lid, etc. No not necessarily.
Symptoms of a faulty door latch can manifest themselves in very strange ways. We just replaced a door latch in a Allroad because the poor guy kept having his keys locked in the car, with the key in the ignition.
The car thought the key was out of the car and that the lock should be engaged so it locked itself, even though he did not try to lock it at all Another symptom is if the alarm goes off when trying to start the car, along with the symptom you are experiencing. The door ajar warning is just yet another symptom but you can have all or only 1 of these symptoms with a faulty door latch.
Cookies Snack. The internal batteries are 2x large button cell type: "N3H 3. There are no same size equivalents! WoorlordFeb 25, Brilliant solution! Thanks very much to Woorlord and QuattroJames for their help in providing this excellent and apparently fairly straightforward mod. I assume the beeping which appears to occur randomly at present is a built in warning for standby battery imminent failure?
Presumably without some standby voltage present, eventually the unit would beep all the time? I ask, because I am actually not too concerned about the possibility of a thief attempting to steal my car by opening the bonnet and disconnecting the main battery, so dispensing with this feature might also be a possibility for me.
Audi A4 alarm problems....flat battery
But I don't want the random beeping bursts! Again many thanks. ChrisavantFeb 22, WoorlordMar 24, This is excellent - many thanks woodlord. Just ordered all the bits from Maplin so hopefully will be here in the next few days, will let you know how I get on.
AlexGSiFeb 29, In regards to my above post - things turned out to be abit of a fail. AlexGSiMar 7, Also don't make the mistake of trying to test with 12v on the pins as I did yesterday and today I opened it up and realised I have fryed two components. Excellent write up,my alarm is making the 4 beeps at the moment so hopefully caught it before the batteries leak,shall be attempting this mod myself,thanks again :thumbsup:.
Bought the bits and followed the instructions, success of a sort. Can anyone tell me where the alarm sounder can be found on my A4 B6 Avant? I've searched, but only ones that mention where it's mounted is for the saloon models. KitkatNov 22, It's on the offside, accessed through the boot hatch by the rear light. You'll need to take the trim out and remove the amp to get the siren out.
Cool, found it now. As James has said, remove boot spare wheel floor, right had side plastics and the bass speaker box, it's then held in with 1 nut down under the rear light cluster, it's a pain but manageable.
Car Alarm Keeps Going Off: Causes & Solutions
Did this today - thanks for the write-up Woorlord! AceOn GroupMay 6, Original Poster. Search My Stuff What's New 3 12 24 A4 Cab, Alarm Gremlins. Hi Chaps Any idea what might be causing the alarm on my A4 Cab to be intermittently going off with roof up? Tried all the obvious checks like checking windows and doors etc. Cheers, James. EVOeng posts months. I had a similar problem with my Audi A4 Cabriolet. Does it have a different sound to your standard alarm? And does the alarm go off even if the car is unlocked.
If yes, the alarm horn has an internal backup battery and a failed alarm horn backup battery is a known cause of this problem. I hope this helps. Cupramax 9, posts months. Yeah the A4 cab alarm beeps feebly Alarm battery backup dying is probably your fault. Do you have any metal objects in your centre console by any chance, coins etc. Theres a sensor underneath the back seat and this is often triggered by metal in its path. If so try removing them and seeing what happens. I found this thread after some web searching as I've also had problems with the alarm going off for no apparent reason on my A4 cabrio.
I only recently moved a bag of coins from the dashboard tray to the armrest, which does seem to coincide with the start of the false alarms. I'll remove the coins and see if that does the trick. Thanks for the tip!SUNLOVER placed once this prep at Bunbury and finished in the middle of the pack last start at Bunbury, still in this. SON OF A COAT back from six week let-up. Kept chasing and just missed last start at Northam when first up, could upset. ANCIENT HOPE faded to finish on the winners' heels last telegram x videos hot malayalam at York and should run fitter for past attempts, cannot be ruled out.
Lies in Disguise (5) 3. Okina Kuri (12) 1. Deep Cover (13) 11.
Dynabelle (1) LIES IN DISGUISE narrowly beaten when heavly backed last start at Narrogin and has shown early speed in races to date, a winning chance. OKINA KURI just missed as favourite last start at Bunbury when first up and likely to race on the speed, dangerous.
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RICH RED unwanted by the market but right up there last start at Ascot when first up and generally strong second-up, place claims. Young Gina (15) 9. Rare Coin (1) 14. Remunerator (10) BLACKLINE first-up after 26 week spell and placed in both lead-up trials, perfectly placed. YOUNG GINA let-up and chased well to fall just short last start at Bunbury, each-way claims.
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