Ther alternator doesn’t charge.
I had a water leak on my CEM (type L), the connector “C” had oxidation.
Bought a used one and had it cloned.
Hooked up to vida the alternator current is 0A, 0V.
When measured on the alternator terminal and casing it still shows 11.70V which is i guess just the battery voltage and the alternator doesn’t charge.
I already cleaned all the ground and positive terminals on the car.. put an other used alternator in which was tested okay before, tried a fully charged battery, checked all fuses but still nothing.
I have now a new fault code though:
ECM 6200 ALTERNATOR SIGNAL MISSING.
(and the old ones:
CEM 1C05 30-POWER SUPPLY SIGNAL TOO LOW
ECM 6662 GLOW PLUG RELAY CONTROL – FAULTY SIGNALDDM-0032 REAR VIEW MIRROR POTENTIOMETER FAULTY SIGNAL
CCM-0040 AIR QUALITY SENSOR INTERNAL FAULT)
I have now cleaned the DELPHI plug “C” which was soaked on the CEM as the plug also seemed to have some oxides on the outside. I used a very thin needle (super gently) and electric contact spray. Still the same alternator issue. No charging.
I checked the alternator’s signal wire to the ECM A88 pin, it shows continuity. Measured the voltage on the signal wire whilst the car was idling, it is 8.52V.
So, that would suggest to me the LIN is up and running. However I can’t really check the signal without an oscilloscope..
The resistance between alternator B1+ and the jump starter point next to engine bay fuse box is 0.6 Ohms with battery connected, ignition off.
As far as i understand, if the CEM, or the ECM would be still faulty, i shouldn’t have the LIN up and running. The alternator is a used one “reconditioned” allegedly. I tested it with new battery and cleaned all grounds around the car.
Tensioner is good, belt is good.
I can not think of anything else but that my replacement alternator is faulty and my original alternator wasn’t necessarily faulty, just the water damaged cem shorted the LIN. Or that was also faulty..
Surely I am missing something. Shall i take the “C” connector (Delphi) from the CEM apart and check the crimped socket in the plug as those were oxidated too? Although i cleaned it i can’t be sure how good it is.. but then the LIN wouldn’t work if that was the issue.. however on the CEM the C16 seems to be the a LIN signal to/from the alternator. And that’s on the cable plug from the water damaged socket…agggr. Someone please put me out of my misery..
I visited 4 car electric garages today 3 of them said they could have not done more. Third one said it’s a nasty one and gave me an appointment for September.