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benwilson67

Lexus LS Poor Starting

My 2016 Lexus LS with a gasoline engine is having intermittent starting issues related to Terminal 30. The car has 210429 km. I suspect the battery, but what do you think?

4 comment(s)

tobiasfox9

I have a Lexus LS too. I had a similar starting problem that turned out to be a faulty charging system. Have you checked the alternator output and the wiring harness to the battery? Also, check the starter motor circuit.

benwilson67 (Author)

Thanks. Can you explain how you diagnosed the charging system fault and if you had any circuit breaker or ignition switch problems?

tobiasfox9

The battery kept draining overnight. A parasitic draw test showed a faulty voltage regulator in the alternator. I'd get a professional opinion. The repair cost me 290€.

benwilson67 (Author)

Thanks for the info. I'll schedule a workshop appointment for a charging system diagnosis.

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