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Seat Ibiza Starting Issue Diagnostic Pointing to Terminal Fifteen

I'm at my wit's end. My 2000 Seat Ibiza with a gasoline engine is refusing to start. I've got 94811 km on the clock. Plugged it into the diagnostics and it's throwing up an error: 'Terminal 15 ignition positive interrupted'. The error memory suggests a defective cable or plug connection. This points to a power supply problem. I've checked the obvious fuses, but no luck. Anyone experienced similar? Could it be a faulty relay switch or some other circuit break issue? Before I start tearing the whole dashboard apart, any pointers would be great.

4 comment(s)

That sounds suspiciously familiar! I had a similar issue with my Ibiza - although I can't remember the exact year, I think it was around the same vintage. The car just refused to start, and I was pulling my hair out trying to figure it out. Did you check the relays?

Relays, huh? Which relay specifically? And where is it located? I've checked the main fuses in the fuse box, but didn't think to look at the relays. Is there a specific one I should be targeting related to the power supply or ignition circuit?

Honestly, I can't recall which exact relay it was – it was a while ago. But it definitely had something to do with the ignition circuit. If the diagnostic is pointing to terminal 15, that's ignition positive, so you're on the right track. I would suggest going to a workshop though. They should be able to figure it out. In my case, it was a relatively cheap fix.

Took it to the workshop this morning. Turns out it was a defective relay switch in the fuse box, just as you suspected. New relay, and the car is starting fine now. Total cost was 95€, so bang on what they initially quoted. Thanks for your help – much appreciated!

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