leawerner1
Colorado Anti Theft Alarm Issue
Summary of the thread
A 2015 Chevrolet Colorado diesel experienced a malfunctioning anti-theft alarm system, suspected to be linked to its coding for optical locking. A similar issue in another vehicle was attributed to a power failure affecting the alarm control module, potentially caused by a weak battery. It was suggested to check the battery and consider professional diagnostics. Ultimately, the problem was resolved by recoding the alarm system at a workshop, confirming the initial suspicion.
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4 comment(s)
leawerner1 (community.author)
Interesting. The battery seems fine, but I haven't specifically tested it under load. Could a marginal battery really cause the alarm system to completely fail like that? Is there any way to diagnose this at home?
ralfghost6
Yes, a marginal battery can wreak havoc. Think of it like a dam with a small leak – it might hold for a while, but eventually, it will fail under pressure. While you could try diagnosing it yourself with a multimeter, the alarm system can be tricky. Best bet is to take it to a workshop.
leawerner1 (community.author)
Thanks, that's helpful. I took it to the shop, and you were right! The alarm system was coded to activate optical locking and after a power failure it got stuck. They recoded it, and it cost me 45€. All good now.
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CHEVROLET
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COLORADO
ralfghost6
Sounds familiar! I had a similar gremlin in my old Audi A4. Turned out to be a power failure causing the alarm control module to act up. Did you check the car battery recently? A weak battery can cause all sorts of weird electrical problems, like a faulty alarm sensor.