lukasdark1
Eon Terminal 30 Fault
Summary of the thread
The issue with the 2016 Hyundai Eon was a "Terminal 30 continuous plus interrupted" fault, leading to poor starting. The suspected cause was a heavily discharged or defective battery, which was confirmed by a multimeter reading of 11.8V. After replacing the original 7-year-old battery, the problem was resolved. Suggestions included checking for parasitic draw or a short circuit if the issue persisted, but the battery replacement proved to be the solution.
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4 comment(s)
lukasdark1 (community.author)
Thanks for the suggestion. How exactly did you diagnose parasitic draw? I have a multimeter, but I'm unsure of the best way to test for it. Also, the battery is original, so about 7 years old.
theresa_hofmann1
I didn't diagnose the parasitic draw myself; I took it to a workshop. Given your battery is original, it's probably the primary suspect. However, if replacing it doesn't fix the issue, definitely get the car properly checked for parasitic draw. A short circuit could also cause this. Best to consult a professional before frying something.
lukasdark1 (community.author)
Appreciate the advice. Replacing the battery seems to have resolved the "Terminal 30" fault. The multimeter confirmed the battery was heavily discharged, with only 11.8V after being left overnight. A new battery cost 290€. Thanks for your help!
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HYUNDAI
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EON
theresa_hofmann1
I had a similar issue with my Eon. Did you check for parasitic draw? Sometimes a faulty module can keep drawing power even when the car is off, which drains the battery. Also, how old is your battery?