achim_wolf6

Nissan Cima Overvoltage Electrical Anomaly

I'm facing a perplexing electrical anomaly in my 2003 Nissan Cima with a gasoline engine. The diagnostic system reports a persistent overvoltage condition and numerous fault memory entries. This results in system failures, a weak battery upon starting, and generalized electrical malfunctions. The vehicle has 54926 km on the odometer. I suspect a heavily discharged or defective battery may be the cause. Has anyone encountered similar issues?

The 2003 Nissan Cima is experiencing an overvoltage electrical anomaly, leading to system failures and a weak battery. Possible causes include a heavily discharged or defective battery, faulty alternator output, poor grounding, or a malfunctioning voltage regulator. Suggested solutions involve load testing the battery, checking alternator output, ensuring clean grounding points, and consulting a workshop for a comprehensive diagnostic assessment. The issue was ultimately resolved by replacing a defective battery.

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4 comment(s)

Overvoltage issues in Nissans can be tricky. Have you load tested the battery and checked the alternator output voltage under various load conditions? Also, confirm the grounding points are clean and properly connected. A faulty voltage regulator could also be the culprit. What voltage readings are you observing at the battery terminals with the engine running?

Thank you for your insights. I will investigate the alternator output and grounding points as you suggested. Regarding the voltage readings, could you please clarify the expected range under different load scenarios, and where one might find the voltage regulator?

The expected voltage range at the battery terminals with the engine running should typically be between 13.5 and 14.5 volts. Anything significantly above this range indicates overcharging. The voltage regulator is usually integrated within the alternator itself on that model. Given the severity and breadth of the symptoms, I would advise consulting a reputable workshop equipped with appropriate diagnostic tools.

I appreciate your thorough analysis and prudent recommendation. It confirms my suspicions regarding the complexity of the issue. I will proceed with a comprehensive diagnostic assessment at a qualified workshop. The final repair cost ended up being 290€, stemming from a defective battery.

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NISSAN

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CIMA