2003 pt cruiser 2.4 p0335 p0340 p0123

Hello.. guys..
I got 2003 pt cruiser 2.4 no start. And no spark..fuel pump is working ..i got 5v on the orange wire.. a good ground on the black blue wire (the only thing on this black wire is with the swich on show 2.73 volts i not sure why).. and 5 volts on the tan yellow wire.. this is for the cps... and on the crank the same thing.. but till no spark .i swap the asd relay still nothig.. 20 amp fp/asd fuse is good.. what will be the next step or im meesig something.. thank you.

gerber wrote: a good ground on the black blue wire (the only thing on this black wire is with the swich on show 2.73 volts i not sure why

Are you saying that you have 2.73 volts on the BLK/LT BLU wire of the Cam sensor, with the key on? If so, you have a bad ground.

What voltage reading do you get on some of these other grounds?

Thanks for u answer.. i got the same voltage on all those sensor. But what i did was follow the wires to each sensor see where the short was .. and i find some wires where they was touching each other.. so i fix it. So it was no more voltage on the black blue wire . So i was happy. And then after 10 min i check the wire back again and show 3.73 v and i said what? So what i did i cut the main wire black blue that goes to the ecm .. and then i check the end of the wire no voltage .but the other end that goes to the sensor show 3.73 v
So i run the black blue wire form the ecm streight to the cam sensor .. and still show 3.73v. Why? So i unplug the cam sensor and no more voltage so i decide to try the other sensor (kps. Tps. Map..etc?) And if they are plug in. Show 3.73v. Each sensor but if i unplug them there is no voltage so do you think all the sensors are bad ?because i did on each 1( not at the same time ) running the black wire streight from the ecm to the sensor and when the are plug in show 3.74v but if i unplug the sensor no more voltage. So i remove each sensor and keep it plugin and still show 3.74v so i leave the sensor plug in an cut the orange wire. And no more voltage on the black blue wire i really dont understand whats going on ...

The voltage you are seeing on the Blk/Blu wire originates from the Orange wire. Power goes into the sensors on the Orange wire, passes through the windings of the sensors, and comes out on the Blk/Blu wire looking for a ground. The problem, I think, is that as it comes out of the sensor it should be grounded by the PCM on the Blk/Blu wire. I think you need to check your PCM grounds. If the PCM, itself, is not grounded well, it cannot properly ground the sensor circuits.

Before you reconnect the wires that you snipped, connect a test-light to BAT +. Touch the test light to the snipped Blk/Blu wire coming from the PCM. It should light the test-light.

Good ground in the plug and ecm pin. . C1-pin 9 black/tan .. the same thing on pin 18  black/tan

No ground  in the plug and ecm pin  c2-pin 27.  Black/lb.

Good ground on the ecm and plug  c3-pin17.. br/yl


Good ground on the ecm and plug  pin c4- pins 12&14 ..

 So this mean the ecm is not good  because the c2 pin 27  no ground?
Do u think than i can use the sensor ground signal from the c3-pin 17 brown/yl?
Thank for u help..

gerber wrote: So this mean the ecm is not good because the c2 pin 27 no ground?

That would be my conclusion. Unless someone knows of a reason the ECM could/would open this ground circuit?

Do u think than i can use the sensor ground signal from the c3-pin 17 brown/yl?

I would do it. I would, probably, use an engine ground. At this point I am considering the ECM bad. What do I have to lose?

Well the ecm is bad for sure.... but i used the sensor ground #2 signal. And is runnig again.. thanks for u help..
My God bless u where u really need it like he did with me this time . Thanks again..

gerber wrote: Well the ecm is bad for sure.... but i used the sensor ground #2 signal. And is runnig again.. thanks for u help..
My God bless u where u really need it like he did with me this time . Thanks again..

Nice fix! :woohoo: So you're going to roll with it like this? 'Cause I would.

That would be my conclusion. Unless someone knows of a reason the ECM could/would open this ground circuit?

Eh, not really? The only thing that comes to mind is an intermittent short to power. Tough to prove, and tougher to catch.

Well i have no choice .. i let u know what appens.