Electrical Problems PS,A/C,RADIO,SPEEDOMETER,SIGNALS,AIR BAG LIGHT ON, ALTERNATOR

[toystory]

The Yaris battery is good even, with the problem, the car still turns on. The Alternator has also been checked as I mentioned earlier.
I wanted to know if the Alternator is controlled by the ECU.....

[CTScott]

Originally Posted by toystory

The Yaris battery is good even, with the problem, the car still turns on. The Alternator has also been checked as I mentioned earlier.
I wanted to know if the Alternator is controlled by the ECU.....

No. It's not controlled by the ECU, but it puts out a pulsed signal to the ECM, the AC ECU, and the DRL to let them know if the alternator is generating power. That output signal is a function of the voltage regulator. The alternator could be generating power, but if that signal is being generated, then the ECM and the other systems that use that signal wouldn't think that it was. You'd need an oscilloscope to check for that signal.

[toystory]

Thanks for the info. I'm gonna try to figure out what's going on, I don't have much experience but that's what threads are for. TY!