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Old 07-18-2016, 12:46 PM   #11 (permalink)
Vixen21, Smart fortwo cdi
Join Date: Jul 2016
Location: Toddville, Iowa
Posts: 6
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Monitor your 12 V battery voltage as you drive. Cigarette lighter plug voltmeters are handy
I would expect it should be charging somewhere around 13 to 14.5 Volts.
Turn on your headlights, fan, and slam on your brakes, whats the voltage?. errors generated as voltage drops below 10.5v to 11v might be undependable..
Check your charging voltage at Idle and at 2500 rpm's. It may be only charging properly and higher rpm's .
So what does this all mean ?
Get the facts and let's determine the source of the problem ,

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