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Thread: Digital Transmission Range Sensor on 99 Taurus Reply to Thread
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  Topic Review (Newest First)
01-16-2014 01:53 PM
BryanCookson just giving this a bump and asking another couple questions. firstly I have a diagram that shows the wiring for the internal harness and correct me if I am wrong, but if per say I put the gear selector into 1st or reverse and sent 12v to the torque converter clutch, I should get the gear to engage or do I need to send power to a shift solenoid as well to do this test? its been 20 below actual temp for our high up here so I have not dared venture out till the last few days to look at it. my next question is. if I do not get any response from attempting to manually engage the torque converter clutch solenoid would it been worthwhile to invest $$$$$$ to have the trans removed, inspected, and repaired if necessary and same for the torque converter and the respective clutch? the chassis is at 248000 original miles, the engine was replaced with an unknown donor within the last 25000 and ia running like a champion, the trans I have no idea on except the fluid was flushed around 2K ago. could be original for all I know. interior is emmaculent for being a 99 and having 248K I am currently having to drive a 1978 GMC that fetches a pretty 6 mpg in town and 15 hwy. so I need something a little better. in everyones honest opinion is the money invested into the repair going to be worthwhile or should I sadly scrap her out and get my 250 back? honest answers please.
01-13-2014 11:31 AM
SoNic67 You can try to mess with the connection to the transmission, maybe you can lock up the TC.

01-13-2014 08:10 AM
BryanCookson well itried the new sensor with no effect at all. I double checkedthegroud and the hot in run and hot in start they are all perfect. any ideas for me to check next? is there a way I can manuals send power down to a shift solenoid and the torque converter clutch to try and bypass the pm just to see if it will go into 1st or reverse or if maybe the torque converter clutch is the trouble maker??????
01-08-2014 02:25 PM
The White Falcon Your problem appears to be more mechanical than a sensor.

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01-08-2014 01:55 PM
BryanCookson so I went an bought a new dtrs and tested it, it tested out fine, hooked it up and no go, I checked the ground and the hot in run and hot in start leads and they all read perfect, it is below zero out here if that makes any difference. when I turn the selector to a gear the sensor on the air duct by the filter opens and the engine shudders but no engagement, gonna try to find the pcm and make sure everything is making it there, and not sure where to go from there. but even if I unplug the internal transmission harness it used to atleast go into 1st but not anymore. if I send power directly to the torque converter clutch maybe I could alteast see if that much is working, also wondering if the gears are still manually selected since the gear shifter rotates the spindle on the top of the tyranny. and I just need to get the torque converter to engage maybe? correct me if im wrong.
01-08-2014 11:57 AM
BryanCookson here are the circuits that are incorrect according to the pdf. pins 2 and 6 in reverse are closed 9 and 11 are open and 10 and 12 are closed. in neutral 2 and 5 are closed 2 aand 6 are open 9 and 11 are closed and 10 and 12 are open. in 2nd 2 and 5 are open and 2 aand 6 are closed and in 1st 2 and 5 are closed and 2 and 6 are open all the other circuits are correct in their respective positions and this is a $50 craftsman multimeter and I performed all tests 3 times last night hand rotating the switch between positions just to be sure.
01-07-2014 10:49 PM

I already measured and I get 270 Ohms across 2-3 for reverse neutral and drive as I should but there are a few circuits, which ones I can't remember offhand that were closed when they should be open and one or more that were open when should be closed. However Thursday I am going to check and make sure I havepower coming in from the fuse and double check the connections going to and from the pcm as well.
01-07-2014 11:11 AM
SoNic67 If you have a multimeter you can try to measure the contacts/resistors inside (using two paper holders to get inside the contacts). You can rotate the center square by hand to every position.
The picture that you show is for the analog sensor, I think that in 1997 they switched to a digital sensor:
01-06-2014 10:34 PM
BryanCookson I have to get it down to the local parts place before I can get it scanned lol talk about a catch 22
01-06-2014 09:01 PM
The White Falcon It seems like a torque converter issue, not a TR sensor issue. It might help if you got the codes scanned to see what the computer is saying.
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