Mechanics

I AM TRYING TO LOCATE A ECM/PCM POWER RELAY CIRCUIT

2004 Dodge Intrepid • 72,000 miles

Changed cam sensor and crank sensor
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Nessaboo1380
May 7, 2012.



Are you referring to the automatic shutdown (ASD) relay?

Caradiodoc
May 7, 2012.
I checked the asd relay and the 2 fuses and they are good but still no fire to the coil

Tiny
Nessaboo1380
May 7, 2012.
Do you mean no voltage to the coil, or you have 12 volts going to it but you're not getting spark? How are you testing for it? Have you checked for voltage to the injectors and fuel pump?

Caradiodoc
May 7, 2012.
I also replaced the cam sensor and the crank sensor

Tiny
Nessaboo1380
May 7, 2012.
I don't have anything going to the coils but I did a diagnosis on it and it gave me a code PO685 which was ecm/pcm power relay control circuit went on to check and replaced ASD relay.

Tiny
Nessaboo1380
May 7, 2012.
No reply are you still there

Tiny
Nessaboo1380
May 7, 2012.
The ASD relay should turn on for only one second after turning the ignition switch to "run", then it should turn on again during engine cranking. Check for 12 volts to the ignition coil or any injector. That wire used to be dark green / orange. If it's different on your car, just look for the wire that's the same color to all the injectors and coil(s) / coil pack.

If you never see voltage there, the ASD relay is not turning on. That would agree with the fault code that the computer doesn't have control of that relay. The wire between the coil part of the relay and the computer is broken or grounded. The most logical cause would be a stretched terminal in the relay socket or computer connector, or corrosion on one of those terminals.

Caradiodoc
May 7, 2012.
Give me a minute. I'm researching and typing on seven other problems.

Caradiodoc
May 7, 2012.
So do you think that I need to replace the computer

Tiny
Nessaboo1380
May 7, 2012.
Ok

Tiny
Nessaboo1380
May 7, 2012.
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