1999 Honda Civic Repair Question
Mileage: 99,000 miles.
Please tell me what it could be.
Voltage regulator is inbuilt and since you can't have engine running with it connected, you would need to remove it for a bench test.
alternator was fine. Like new back to the drawing bord my father in law was the one who red my coeds. I don't mood he did it right but before my car finally choked out he read my coeds and I rote them down and just found them and hear they are. Po116 - p1399 and stored po108 - po420
P0116 is a fault with the Engine Coolant Temperature switch. This can cause difficut starting and stalling when engine is warmed up.
P1399 is temporary codes for misfiring.
Others have been explained to you.
Have the ECT checked.
Hay if I had a bench test done on the alternator it would not tell me if the voltage regulator is over charging would it. becaulse the (PCM) is used as part of the alternator control system sending a signal to the voltage regulator. I think the alternator is causing this problem I have smoke rolling out of my ears!!! Thanks
Hay if I had a bench test done on the alternator it would not tell me if the voltage regulator is over charging would it? becaulse the (PCM) is used as part of the alternator control system sending a signal to the voltage regulator. Don't no just asking. Thanks again
It is possible bench test don't tell if it is overcharging and yes, you are correct about the PCM controlling the charging. Apart from the alternator, the PCM can also possibly cause charging faults.
One way of finding out is to replace with a known good alternator and test. A no charging problem is not too bad but an overcharging system is very dangerous as it can take out a lot of electrical components when voltages spikes.
I once had an older model vehicle which had every bulb in the vehicle blown and wasted a lot of time diagnosing as I did not think of all bulbs blowing when lightings did not work.