1999 Dodge Durango Error code P0207

Hi
Engine off disconnect #7 inj. and PCM check resistence between ground and No. 7 drive circuit (Vilot Wire) If resistence is 5 ohms or greater then Pcm is assumed defective. According to Dodge
Also the ASD relay high resistance may set code.
Let me know
Thanks for Donate

[quote:78a47a6c8b="Docfixit"]Hi
Engine off disconnect #7 inj. and PCM check resistence between ground and No. 7 drive circuit (Vilot Wire) If resistence is 5 ohms or greater then Pcm is assumed defective. According to Dodge
Also the ASD relay high resistance may set code.
Let me know
Thanks for Donate[/quote:78a47a6c8b]
Hey Doc,

After disconnecting the #7 connector and the PCM connector, which ground should be checked against the Violet #7 drive wire?

Hey Doc,
I disconnected the NEG side of battery.
I left the PCM connectors in.
I then connected a Fluke meter (set to ohms) to a grounding point on the firewall and then checked the drive wire of each injector.
All injector drive wires came up with approx. 22ohms except drive wire #7 NG.
What do you think?

That is indicating an open to ground in that circuit. So need to find fault in circuit. I'll do some research if you have wiring schematic see if you can trace circuit.

I am looking at the Haynes schematic for the injectors.
From the injector the drive wire goes directly to PCM connector #2 pin #2. Nothing else is in the circuitry.
I have already checked the #7 drive wire from the injector connector to the PCM connector and I did have continuity.
Somehow it reads open when the PCM connector is plugged in.
Does the PCM have a resister built into the driver circuitry as a type of checking system?
That could be the whole issue, the correct resistence is not being seen on that injecor circuit and that is throwing the code - even though the injector is working.

Check ohms in ground wire Dark green/orange from inj #7 term to ground. If you get anything above 0 ohms then fine ground connection near harnes breakout to inj #7. See if clean and tight.

The dark green/orange wire is the +12VDC from the ASD relay.

Yes wanted to know if wire has any unwanted resistence

Battery NEG disconnected -
All 3 PCM connectors - disconnected
ASD relay pulled out -
Unplugged all injector connectors -
I checked (ohms) every injector Dark Green/Orange terminal to the NEG wire and all readings were equal @ 2.4 ohms.
I also checked all injector drive terminals and no continuity.

Right next to ASD there is fuel pump relay switch see if code comes back. High ASD resistence will set code

Swapped the relays-
Erased the DTC-
Started the truck and the code came back-

Hey Doc do you have any other suggestions?

Well short of trying a new PCM I'd say go have a diagnostic scan done and see what they find. This is not reading codes but interfacing with PCM and reading all input and output signals.

What is the typical charge for a diagnostic scan?

I will update you with the cure.
Thanks for your help!

Usually a charge of 1 to 2 hours at your areas labor rate and most time credited to repair.

I installed a reconditoned ECU and the truck has been fine for now.
The computer was not seeing what it wanted to see.

Great news wondered what happened to you.