The car in question has already had 2 alternators and batteries installed. After I started getting involved with it, I found that there was no apply voltage coming from the ECU to the alternator. (Only .250V) The charging output is non-existent. If I physically feed in a 3 volt signal, the alternator tarts putting out 14.56 V as it should. No battery light on during the no charging phase. But the bulb proves out during key on. No codes.
So my question is this.....where does the ECU get it's sense of "vehicle load" to enable it to feed voltage to the alternator for charging? Initially it was thought the ECU was just bad, as nothing would change the trigger voltage for the alternator. So, new ECU, but still the same problem.
All fuses are good, new battery, new (aftermarket) alternator, new ECU.
i noticed a procedure used to trick the ECU into constantly charging. I was wondering if it would work for this vehicle?
Any ideas on where to go from here?
