Members | Sign In
ScannerDanner Forum > Post your repair questions here
avatar

1994 dodge dakota 5.2 liter no start

posted Jul 06, 2016 22:26:25 by cheryl hartkorn
having trouble with this one. have no power to ignition coil, or injectors. so im leaning towards the asd relay. what does the pcm look for to turn the relay on? ot says on all data it says the pcm looks for a distributor signal with the key in run position. so it doesn't use cam signal? need some ideas
page   1
10 replies
avatar
Noah said Jul 07, 2016 01:15:16
Hi cheryl,
When they say that it uses the signal from the distributer, that is referring to the hall effect sensor in the distributer. AKA, cam sensor.
Here is a great video on the free channel covering Chrysler cam sensor testing.

Are you getting 5v to any of the other sensors?
Are you able to retrieve any trouble codes on this system?
Have you tried jumping the ASD relay?

The coil and injectors do indeed get power from the ASD relay during cranking/running. but I haven't seen anything saying if the ASD is momentarily grounded for the initial 2 second fuel prime...
[Last edited Jul 07, 2016 01:20:59]
Massachusetts, USA
avatar
Noah said Jul 07, 2016 01:18:30
This video starts with code flashing on an pre OBD2 Dodge.
Massachusetts, USA
avatar
Tyler said Jul 07, 2016 01:21:59
I think it just looks for a distributor signal on this one, but I'd have to check Mitchell. Is there a cam sensor on this engine? I'm honestly not sure.

Looks like the ASD relay is ground side switched by the PCM, by the same driver that controls the fuel pump relay. Kinda a funky setup...

Honestly, it would not surprise me at all if you ended up finding a PCM problem here. I've replaced computers in this generation of Dodge before for this exact symptom, with no rhyme or reason found for the driver failure.
avatar
cheryl hartkorn said Jul 07, 2016 22:12:19
well replaced coil fixed! then ran like crap the owner had the plug wires on wrong on the distributor cap.
avatar
Tyler said Jul 07, 2016 22:42:35
Wait, what? I thought you said you had no power to the coil or injectors?
avatar
cheryl hartkorn said Jul 07, 2016 23:17:03
well I looked at it super quick for a friend checked for power at the injectors and coil didn't have any. did some digging on all data and seen the injectors and coil only get power for 2 seconds with the key on. then nothing until cranking or running. so checked it with 2 people this morning and seen I had power at those points. what got me was its not like a lot of cars where you have power at the injectors with the key on longer than 2 seconds.
avatar
cheryl hartkorn said Jul 07, 2016 23:18:39
first time I checked it I was by myself. by the time I got out of the car the 2 second time window was over.
avatar
Noah said Jul 07, 2016 23:38:20
cheryl hartkorn said 14 minutes ago
first time I checked it I was by myself. by the time I got out of the car the 2 second time window was over.


Those can be tricky, sometimes I'll leave my power probe hooked up with the speaker on so that even if I can't see the red LED, I might be able to hear the tone over shop noise.
Or I'll use a long set of meter leads I made out of some old RCA cables.
Massachusetts, USA
avatar
cheryl hartkorn said Jul 07, 2016 23:40:47
don't have a power probe. need to get one. test light is the go to tool for me quick n easy. probably check amazon for one. the tool trucks want to much for one
avatar
Tyler said Jul 08, 2016 00:43:17
Ahhhhh yeah, that makes sense. Kinda strange the first time you encounter a setup like this.

Sorry if I came off as angry before!
Login below to reply: