So I tested relay outside car and it works. But if relay should turn on when key put in run position its does not. I can plug it in while key on and it does not click. I did test by jumpering past relay in the box and it made no difference.

Next, my understanding (mostly on older V8s) is the coil is supplied with 12v constantly when key is in run position. Is this one different?


Sorry to be a PITA man but I really appreciate the help.

 

The ASD Relay provides 12 volts at pin 87 on a dark green/orange wire to Joint Connector 2, pin 15 (in the PDC); then out pin 16 to Connector 130, pin 4 (large connector with a bolt in it) in the PDC; then to Splice 123; then to Splice 117; finally to pin 1 on the Ignition Coil. The wire color remains the same from start to finish.
The Ignition Coil Driver in the PCM is connected from PCM connector 1, pin 7 on a black/grey wire to pin 2 on the Ignition Coil.

 

The battery voltage is supplied to the ASD Relay by 30 amp Fuse F6, on Relay pins 30 and 86.
The Automatic Shutdown Relay Control signal comes from the PCM connector 3, pin 3 on a Dark Blue/Yellow wire through Connector 130, pin 14 (in the PDC) to pin 85 of the ASD Relay. The wire color remains the same from start to finish.

 

If you jump pins 30 and 87 in the relay slot, you should get 12 volts on the coil and injectors. Make sure you have 12 volts coming in on pins 30 and 86. If not, check fuse F6.


To answer your question about constant power to the coil, not if the engine is not running. But, when everything is right, the PCM turns the ASD Relay on for ~2 seconds when it starts cranking. If the PCM gets signals from the crank and cam sensors, then the ASD relay is kept on, providing constant power to the Coil and Injectors.

 

Well gave up after trying everything I know and brought it to a car electrical place locally. After some diagnostics they determine the PCM is bad. This a common thing to go bad? Anyway, they want $991 to put new one in and program it and he says thats the "next step" and wont necessarily solve the problem. WTF?

Do these PCM need to be programmed?
Can i get a junk yard one?
Can this one be fixed?

Thanks all!

 

That's ridiculous. Get the number off the PCM and see if there is a used one on Ebay or somewhere for 200-300 bux. A used one does not require a reprogram. Just plug and play.

 

Are you sure it does not require reprogram? I have had two places tell me it does.

 

My understanding is that if it is the same year, model, engine, and transmission, that it is plug-and-play. I think for it to work the best, your VIN and mileage need to be programmed.

 

You do not have to have it reprogrammed but there are different versions of the software. I believe there has been three or four reversions for my 3.9.
One of those versions is called the "death flash." This was for customers complaining of knocking and pinging on acceleration. If you get one with this code, your van will feel significantly slower - just FYI. From a junkyard you probably have a 5-10% chance of getting this version.

 

I have similar symptoms, start stall, start, stall no restart... I also did not get spark
new reman PCM did not help me

I took out the instrument cluster on my '01 and now I have idled for an hour plus several times... although I have yet to actually drive the van... it never idled over 20 minutes before without stalling and usually much quicker... still fooling with this problem but NOT a daily driver so I am taking my time

see thread stall, start, NO Bus