Question about Audi A4
Audis and Volkswagen beyond 97 have microcontacts in all door locks and the trunk lock. They tend to fail and the anti-theft recognizes it as attempt to mess with the car. So it triggers the alarm. Sometimes also all windows come down nighttime on their own or the alrm triggers without any obvious reasons. First thing are always to the the microswitches. If its a wagon, water in the trunk lid can be the reason (thats where the micro switch for the trunk sits)
Posted on Aug 16, 2009
The factory alarm system has a motion detector. In a HOT near triple digit day,it can cause false trigger/reading to the sensor,
Some Audi A4 has a disable switch on the driver side A pillar. You may able to disable it.
Make sure the battery is charged up and try again,
Battery has a CCA (cold cranking amp) rating on the side sticker,
If the tester read 60% below the stated CCA then it should be changed.
A battery is rated for 24,48,84 month.
When is the last time battery change?
Posted on Jul 17, 2009
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Posted on Jan 02, 2017
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