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erwineis6

Trafic alarm system siren communication fault

Hi, I've got a 2004 Renault Trafic with a gasoline engine and I'm facing a weird issue. The alarm system is completely dead, and the error memory shows a siren communication fault. I've checked the basics, but I suspect a defective cable or plug connection. Has anyone experienced something similar?

Summary of the thread

A 2004 Renault Trafic owner reported an issue with the alarm system being non-functional, with an error indicating a siren communication fault. The suspected cause was a defective cable or plug connection. A similar past experience with a Peugeot 307 suggested checking for corrosion in the wiring harness. Upon inspection by a mechanic, a corroded connector was identified and replaced, resolving the issue.

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4 comment(s)

waltermoon1

Sounds familiar. I had a similar issue with my old Peugeot 307. The alarm would randomly go off, or sometimes not arm at all. In my case, it turned out to be a corroded connector in the wiring harness leading to the siren. Have you checked for any visible signs of corrosion or damage?

erwineis6 (community.author)

Thanks for the tip! Where exactly was the corroded connector located on your Peugeot? Any specific area I should focus on when inspecting the Trafic's wiring?

waltermoon1

On the 307, it was near the wheel arch, quite exposed to the elements. Honestly, I'd recommend having a workshop take a look. They can properly diagnose it and, in my case, it didn't cost too much to fix – just a simple connector replacement. I only paid like 80€.

erwineis6 (community.author)

Thanks, I appreciate the advice. I had a mechanic check it out, and you were spot on! It was indeed a corroded connector. They replaced it, cleared the error, and now the alarm is working perfectly. The total cost was 95€. Cheers!

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RENAULT

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TRAFIC