That one is something new, I didn't have to do that for my last swap 7 years ago. Yeah from what I have gathered at least in the bay area I haven't found to many places that can tune the ecu's from the explorer. Yeah I have a friend that works at a for dealer in the service area and I'm trying to see if he can do the ecu rom verification for me.

 

I did some more work today on the truck and the p0500 code is gone. Moved the jumper wire from pin 1 on the gem module to the wire on the instrument cluster. The p1729 is still there, I verified that all the wiring is the same for 2000 rangers, explorer and 01 explorers. All the wiring is intact. Would changing out the transmission range sensor and I had a torque convertor installed when the transmission was being rebuilt. Would this cause a problem as well, since its the stock tuning?

 

Good to hear P0500 cleared

Looked more at P1729 4low switch error
That can be from the GEM not seeing a Ground from transmission or clutch neutral switch
Since you changed transmission wiring(V8 swap) maybe that did not get hooked back up

There should be a red/white wire on the GEM on pin 22 of the 22 pin connector, its grounded full time on manual or when in neutral in automatic, so just ground that wire
The GEM was the 4x4 control in 2000 Ranger or Explorer so even if its not a 4WD vehicle this code could be the same
Just guessing here

 

Hey, I have both 2000 ranger and 2000 Expo physical wiring manuals. If you need pics of pages in a pinch, let me know.

 

Thanks RonD, TSR85 if you could post the wiring diagrams for the red/ white neutral safety switch wiring for the expo and ranger that would be great. The only thing I can tell from my alldata is that the wire is in the same plug pin, but besides that I can’t see if they run a different route like the vss signal does.

 

see attached, is this what you are looking for?

 

Thanks TSR85 those diagrams sort of help me understand what I'm trying to figure out. I can see that both for the ranger and explorer the signal goes from the digital transmission range sensor through the red/ white wire to the gem module. After that though I can not really tell where it goes before getting to the ecm. Could I get please get a photo of the page 10-3 I think the ground G102 mite be the problem? Ifi can see where it is grounded to i can check that since it grounds through there.

 

it also seems that the Ranger neutral ground interfaces with the 4x4 somehow at the GEMS, but it doesn’t trace anywhere.

 

Thanks again for the diagrams and the help. Now I just have to figure out where the ground 201 is located in the harness, mite not have hooked it up or the wire going to it is damaged. if not I will just have to run a jumper wire grounded to somewhere.

 

201 is on the firewall next to the ECU.





did you verify the DTR is functioning correctly on the trans?

 

As far as I can tell the DTR is functioning properly. The truck only starts in park or neutral, also removed the shifter cable and the arm and verified that the neutral line in the DTR aligns with the sensor. Also verified that the cable is adjusted correctly. I will have to check that ground out tomorrow and see I think I mite have to move that ground. If I wanted to check for a ground when in neutral I would just probe pin 22 on the gem connector with a test light? Also I did try and change out the DTR with a new aftermarket DTR and the engine wouldn't start at all in any gear, put the original DTR back in aligned and all and the truck started right up.

 

I did some more work to the ranger today and the range sensor is giving a reading to the ecu what gear it goes into. Readings from the OBDII port with forscan shows all the gears are functioning and from looking at the books I just got for the wiring diagrams for the ranger and explorer the 4 low indicator is on the 3rd connector which on my 2wd is not used, with no connector to it. I jumped a ground wire to pin 22 on the 22 pin connector area to no change. The computer does give me a reading of 4x4 low indicator present, with no change with grounding out the pin. Is their a way to delete that function from the computer with forscan or disable that monitor so it doesn't show up?

 

RonD for the SGI-100bt I purchased do I cut the low or the high sensor for speed input, then output to the black/ grey wire. Do I completely bypass the gem module and will this not throw a code?

 

I thought P0500 code was gone, that was what the SGI unit fixes???

Not sure on the P1729 code fix, since it shouldn't even come up on a 2WD computer or 2wd GEM

 

Yeah the p0500 code was gone with the jumper wire, but I have larger tires than what came on a stock explorer, so the speedometer is off. From some reading they say this could cause the p1729 code. So I'm jut trying to figure out which wires I have to connect to.

 

Just thought I would update, the p1729 code is now gone after the installation of the Dakota Digital SGI-100BT, which corrected the speedometer and shift parameters of my transmission.

 

Good to know, how was it wired up to the ranger?

Do you have a separate project thread? Or where might you post your experience with BAR inspection.

 

Good stuff

Thanks for the update

 

For the wiring I spliced the output wire from the GEM module. into the input of the module, then output 1 to the grey/ black wire. Then switched power from the radio, ground to the dash frame. I am sending in my info to the referee tomorrow, so I will let you know.

 

Just as a heads up
I would have spliced to GEM's VSS input wire, to take the GEM out of the speed loop all together, which you can still do down the road if GEMs speed conversion goofs up

Good luck with referee

 

I was thinking about doing that, but I was worried it would throw a code since it wasn’t receiving a signal. Then I didn’t know which wire to spice into the low speed input or the high speed input wire. I will keep that in mind for after my swap has passed the referee.

 

Just as a follow up to the status of the swap, the ranger has passed the referee inspection and smog.

 

Awesome!

Who performed the ECU rom verification if you don’t mind me asking? Did a Ford dealer or did a BAR Smog repair tech do it? Or did you have to even provide that?

 

I actually got lucky I emailed and called 6 dealerships and all said they couldn’t do the ecu verification. I got in contact with someone who was able to bypass me on the verification. So I would say do the same and keep an email trail to show them.

 

Interesting, I went to my local Ford dealer and they don’t have a smog tech so they can not do the verification either right now. However, I was talking to my mechanic friend who works at a general repair shop that has a BAR certified Smog repair tech and I think they could do it technically.

What was the resolution to those codes you were chasing down?

Im planning all my work out for end of June due to routine smog check timing.