Battery problems

  • 8 POSTS
  • 2.4L
  • 4 CYL
  • 2WD
  • 135,478 MILES

Lately I have been having problems where my battery has been totally draining. This is the second time this has happened so far. When I turn my key in the ignition it makes a clicking sound. The dash lights come on. Battery light and check engine lights are on. Last time this happened I jumped my car and it started right up. When I checked my twelve volt battery with a multi-meter, it read over thirty volts and slowly came down to seventeen volts in time. I took it to Autozone to have them check my battery, they said it was fine, but there was a problem with my alternator. Now, since my car is a hybrid, I know that it does not have the standard alternator but a belt alternator starter (BAS). Supposedly there is some sort of generator that replaces the average alternator? So then what could be the problem? It is a voltage regulator, right? Or could it be something more major? I am two and half hours away from a GM dealership and my car is dead once again. As I was driving, my check engine light came on and then two days later my battery died. I have been wanting to try to tear into it and fix this problem myself but I have found that there are no repair manuals for my car. This is pretty frustrating. And ideas?

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Friday, February 24th, 2017 AT 9:13 PM

1 Reply

  • 4,993 POSTS

It sounds like the starter generator control module has failed. It takes the voltage from the BAS and converts it to charge the main battery bank and the twelve volt starter battery.
It is not a hard item to replace, it is in front of the transmission. However it is not a drop in part. It has to be programmed to match your vehicle and options.
Service information is sort of hidden but AllData and Mitchell both cover it.

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Saturday, February 25th, 2017 AT 3:16 AM

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