LandCruiser Overvoltage Faults

I'm experiencing some electrical issues with my 2022 Toyota LandCruiser diesel. Currently showing multiple fault memory entries relating to overvoltage. This is leading to failure of various systems, a weak battery when starting, and general electrical malfunction. Mileage is at 67268 km. My suspicion is a heavily discharged or defective battery. Any thoughts?

4 comment(s)

I had a similar overvoltage issue with my LandCruiser. Check the voltage regulator; could be alternator failure feeding unregulated voltage into the system. Have you scanned the ECU for specific fault codes? Could give a clue.

Thanks for the quick reply. I'll check the voltage regulator. Did your symptoms include a weak battery and system failures as well?

Affirmative. Identical symptoms. I'd advise getting it checked at a workshop promptly. Overvoltage can fry sensitive components. If it is indeed a faulty voltage regulator, this could cause serious damage to other electronic parts.

Appreciate the confirmation. Took it to the workshop and they confirmed a faulty voltage regulator. Repair cost was 290€. Thanks again for pointing me in the right direction!

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