Talisman poor starting terminal 30 interruption

I own a 2021 Renault Talisman with a diesel engine and 224219 km mileage. I'm experiencing an issue where terminal 30 continuous plus is being interrupted, leading to poor starting. I suspect a heavily discharged or defective battery. Has anyone encountered similar issues?

4 comment(s)

I've seen similar things with other cars. A short circuit or electrical fault could be draining your battery even when the car is off. Do you have any aftermarket accessories installed that could be causing a parasitic draw? Also, have you checked the charging system voltage when the engine is running? It should be around 14V.

Thanks for your insights. I don't have any aftermarket accessories installed. Could you elaborate on how to check the charging system voltage? I'm not very experienced with electrical diagnostics.

No problem. You'll need a multimeter. Connect it to the battery terminals while the engine is running. If it's significantly below 14V, the alternator might be failing to charge the battery properly. However, with it being an intermittent issue I think it would be best to get it to a workshop.

Thank you. It was indeed a defective battery. After replacing it, the issue is resolved. The total repair cost was 290€. I appreciate the advice regarding the charging system.

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