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dennismiller1

Koleos Electrical Issue

I'm having a weird electrical issue with my 2023 Renault Koleos diesel. It's got about 170k km on it. The vehicle starts poorly. I've diagnosed Terminal 30 continuous plus interruption. My gut says it's a heavily discharged or defective battery. Anyone seen anything similar?

Summary of the thread

A 2023 Renault Koleos diesel with 170,000 km is experiencing poor starting, suspected to be due to a heavily discharged or defective battery. The issue was diagnosed as a Terminal 30 continuous plus interruption. Suggestions included checking for voltage drops, particularly around the ignition switch and charging system, and considering a potential short causing battery drain. The problem was resolved at a workshop, confirming a faulty battery and a parasitic draw in the system.

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4 comment(s)

helmutbaumann1

Whoa, that sounds familiar! I had a similar problem with my old Peugeot a while back. Intermittent starting issues drove me nuts. Have you checked for a voltage drop anywhere? Could be a short somewhere pulling the battery down.

dennismiller1 (community.author)

Voltage drop, huh? That's a good point. Where exactly should I be looking for that? Ignition switch maybe, or should I be tracing the whole wiring harness?

helmutbaumann1

Yeah, I'd check the easy stuff first. Ignition switch and charging system are prime suspects. Honestly, though, chasing shorts can be a pain. If you're not seeing anything obvious, might be worth getting it to a workshop before you tear everything apart.

dennismiller1 (community.author)

Thanks, I appreciate the advice. Took it to a shop as you suggested. Turns out it was a faulty battery, like I suspected, but also a parasitic draw somewhere in the system. They sorted both out. Total cost was 290€. Thanks again for your help!

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RENAULT

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KOLEOS