no start, ( possible) no power to injectors!!

If the injector drivers in the PCM went bad, then it could keep the injectors from firing, but there are a few things to check to make sure that's the case.

The diagram below is pretty much the entirety of the injector/ignition coil circuit. They get all their power from the ASD relay and the PCM controls the ground side of the circuit. It starts at the top right with the fuse, then goes through the relay to the injectors and relay coil. The PCM turns the relay on, and if the relay is good those components will get power. And generally if the ASD relay was bad or not turning on when commanded it would set a code.

Thank you Donut!!
I will get on this in the morning. Church is fixing to go live @ 7p.m. I will do my best to put the PCM back in the van and follow your instructions.. First things first..

1. put PCM in van
2. check Fuse #16 (25A) if good

Thank you so much for your help.. You have a Blessed rest of your night!!

Puzzled you say is running if you give it fuel but there is no spark at the plugs ??????? ---- is Eezi start you are spraying in ? in which that is possible

I don't know these vehicles we don't really see them over here but with Chrysler products with this kind of issue it tends to be either the TIPM or the ground wires for the TIPM which ground low down in behind the head lamp..

Mitchel DIY is a good source of information, diagrams, troubleshooting. Goes more in depth than Haynes. If you're planning on keeping the vehicle long term then there's a multi year option as well which isn't that much more than the one or two year option I think it is.

@ Andy if she had a scan tool couldn't she check for rpm's when cranking to make sure the computer is getting the rpm from the crank signal? Haven't did this method in a long while but remember it in some videos & other Vids on the Ol' YouTube videos I've seen out there from Paul, Eric O, Bernie, "G" from TST & a few others as well.

Maybe test for signal presence or does this system in this video operate differently?

To the original poster don't give up! Giving up is accepting what little information you're given , what you've found when there's truly a solution.

There has to be some shops, facilities around that'll help someone in need especially since you need the vehicle for your husband given his immobility condition.

I don't know of any YouTube guys that produce good videos in Florida. There's one guy who comes to mind but I don't know his complete skill set. His YouTube channel name is " Samcrac " if I remember properly. Maybe reach out to him and see if he may know something unless you get it figured out first.

I know there's "Pay it Forward" groups on Facebook but finding someone who knows what they're doing can be tough at times......

Sent from my SM-N975U1 using Tapatalk

Peaches wrote: Can you send me a diagram of these areas in question

Thank you Chad, for the diagram... and Thank you everyone who has taken time to read this and respond... Donut I'm put the PCM back in her.. just a little difficult when I'm not the one that took it out..Never messed with these before.. Wish me luck !!!

Andy.MacFadyen wrote: Puzzled you say is running if you give it fuel but there is no spark at the plugs ??????? ---- is Eezi start you are spraying in ? in which that is possible

Yeah starting fluid can fool ya.

Andy.MacFadyen wrote: I don't know these vehicles we don't really see them over here but with Chrysler products with this kind of issue it tends to be either the TIPM or the ground wires for the TIPM which ground low down in behind the head lamp..

Chrysler started using ASD relays way before they moved them inside the TIPM. And the ASD shown on the wiring diagram Chad posted appears to be plug in, so hopefully the OPs van doesn't have a TIPM.

Thank you Matt T for your input .. But can you tell me what (OPs van) doesn't have a TIPM means??

Just by chance could this have anything to do with the key system on this van. The key doesn't lock or unlock but 1 door (passengers side front ) . We thought it to be the battery and replaced it and still nothing?? Just a FYI... also a little back ground history on her.. in the last 7 years a shop put in new catalytic converter Then we done new fuel pump 5 /6 yrs. In the past 2 to 3 years there has been ckp. cmp and o2 sensor replaced 3 or 4 times. ( o2 sensor just twice). The last ckp sensor took out my starter.. The little metal tip broke of and ended up in the starters , knocking some of the gears.. Replace all of that and she drove good , no sign , no codes, nothing, but now a no start.. That's her history...

Peaches wrote: Thank you Matt T for your input .. But can you tell me what (OPs van) doesn't have a TIPM means??

It means hopefully your van doesn't have one. OP is forum "slang" for the person who started the thread. A TIPM is an "underhood fusebox" with the relays built inside it instead of being replaceable.

You can try using a incandescent test light to test and see if the computer is supplying ground. To do this, you have to probe the control side of one of the wires and then touch it with the test light while clamped on battery positive (important), try to start the car, the test light should flicker if the computer is sending ground to the injectors. **Control wires are those that are different colors for each wire** Power wires are those that are the same colors for each injector.

Switch the test light to battery negative and now probe the positive side and touch it with the incandescent test light, it should illuminate (I believe you have to have the switch in the ON position for the ASD relay to complete the circuit), this means you have good power coming from the ASD relay. If there is no power there then check the fuse 16, if fuse 16 is ok, then the computer may not be completing the circuit for the ASD relay for some reason.

I have attached the screenshot to check the fuses marked for power, they both should have power when trying to start the car after the ASD relay.

Thank you , I will do this..

aguilarpro wrote: I believe you have to have the switch in the ON position for the ASD relay to complete the circuit

ASDs are controlled the same way as most fuel pump relays. PCM might turn it on for a couple seconds when the key is first turned to Run. After that it only turns on when the PCM detects RPM from the engine. Not understanding how ASDs work might be why someone called the PCM on this van.

I myself did not know why the ASD relay would not work since it was my understanding there are more variables that the PCM detects such as an unsafe sensor that is reporting bad, also if there is an open in the neutral switch (not grounded) would deactivate the ASD? What about a short detected at the airbag module? Thanks for the info on the crank sensor & ASD relay relationship.

THANK YOU Matt T, It is clear that I'm NOT confident in what I'm doing. This is so far off the charts for me. I have to try and figure it out. I am truly grateful for everyone's advice. I'm just baffled that there were no codes, no hicupps , no detection of something going wrong to call the PCM bad. If it is bad, what caused it to fail? I need to know that before putting a new one in or the same thing could happen, Am I correct? Lord this is out of my wheel house..I have watch many of scanner danner videos but I just wish he had one on my exact van then I could just follow his steps...lol things just isn't that easy.. Thanks again..

Usually a bad ignition coil would fry the transistors inside the PCM. Matt can probably help with what else could cause the PCM to die if not working properly. Have you checked all power and grounds are good at the PCM? A faulty PCM may not give codes at all and that's usually the last call even for an experienced technician, for a PCM call, it is difficult to be 100% certain. Always check wiring integrity and connections, etc.

I was told that a PCM can tested to see if its bad once out of the car. Is this true?

I wish I could tell you that is true, it has many transistors inside that you won't have a set-up that can actually test its functionality. I can't speak for dealerships but to be able to test a PCM, that would require a very complex set-up and I don't even know that is possible. Perhaps the manufacturer has a set-up used for Quality Control checks but for the average user and most shops, this is simply not possible to have for every car.

Best thing you can do is check for resistance for a specific pin to pin (assuming you have the specs for the pins being tested). Most of the time this information is found within the manual when testing a specific failure mode or DTC.

Thank you AquilarPro, .. Again so far out of my wheel house.. It looks like my car will be down for awhile..