Transmission range sensor wiring diagram for sensor and the PCM pin location?

ROGER03

MEMBER
2003 FORD RANGER
2.3L
4 CYL
2WD
AUTOMATIC
195,000 MILES

2003 Ford Ranger XLT 2.3 automatic 2x4. Keep getting po705. Replaced TRS worked great for about 2 months and the code is back. Replaced the TRS again cleared codes and the po705 comes back soon as I start the truck. If I push O/D OFF button I can manually shift it up thru the gears and when up to speed turn on O/D and it does at should. Truck starts in park, goes into reverse but barely wants to pull. Looking for a TRS plug in wire diagram and a PCM pigtail diagram so I can test both for signal, broken wire, or corroded wire, bad TCM. If I end up having to replace ECM will my PATS system still work or is it a trip to Dealership to get it all programmed? New to this forum and help would be appreciated.

Saturday, January 3rd, 2026 AT 7:24 AM

3 Replies

STEVE W.

MECHANIC
15,603 POSTS

That is a circuit code, caused by a short to ground or an open in the wiring to the sensor. These are the OE tests for the wiring as well as the wiring. The likely issue is in the 4 signal wires and not the Gray/red wire as that is a signal return (ground) for other sensors that are not showing errors. So the wires in 3, 4, 5 and 6 I would check the connector for corrosion or damage first. Then test the wires.

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Saturday, January 3rd, 2026 AT 11:10 AM

ROGER03

MEMBER
2 POSTS

Checked the TRS connection and it was a bit loose, I got a pigtail & replaced. Still getting the po705. The diagram of the pigtail you sent me has me lost. The diagram of 12 pin connector only shows 1 pin that's not used. My truck's connector has 3 empty slots. So I was wondering if there's a difference between 4wd TRS & 2wd TRS. Any help will be greatly appreciated.

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Wednesday, January 21st, 2026 AT 2:55 PM

STEVE W.