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Discussion Starter · #1 ·
Greetings, my Rav4 2008 Sport 4wd 2400cc is showing error code P0973 on ODBII sensor. It appears that a rodent chewed through the Intermediate shaft speed sensor "A" wire that feeds the readout from the counter gear speed sensor to the ECM (engine computer module).

Here are the details of what the speed sensor does:
Toyota RAV4 Service Manual: Intermediate shaft speed sensor "A" - Diagnostic trouble code chart - Automatic transaxle system - U140f automatic transaxle

Here are my photos displaying the wire chewed off:
https://goo.gl/photos/JQ2U5cF4puUicFqT6

I was quoted about 4-5 thousand dollars by Toyota dealership for replacement of the entire harness (1K) and labor (5K). I'm trying to figure out if i can buy the parts myself from a 3rd party and get a non-affiliated mechanic to do the installation for much cheaper.

From the below link detailing the sensor and wiring diagram of the engine I think that I was able to find the speed sensor part number to be replaced (just in case) - It's called B24 "Transmission Revolution Sensor (Counter Gear)" and the part number is 90980–11156.
http://mr2.bordeauxgroup.com/2007 Toyota RAV4 Electrical Wiring Diagrams (EWD).pdf

However I can't seem to find the part name or number of the wire that connects to it and goes out to the ECM. Is anyone able to help? Thanks in advance!!
 

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i had a rodent chew a part of my wire for cylinder 2. It wasn't severed like yours so I was able to flow some solder in to complete the circuit again.

Are you able to locate the wire ends that were chewed? You maybe able to crimp or solder an extension and then insert it into the plug end.
 
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Discussion Starter · #3 ·
Are you able to locate the wire ends that were chewed? You maybe able to crimp or solder an extension and then insert it into the plug end.
Thank you for the suggestion. I'd like to try to find the harness part number and replace it if i can. I'll leave soldering the wires as a last resort :)
 

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Thank you for the suggestion. I'd like to try to find the harness part number and replace it if i can. I'll leave soldering the wires as a last resort :)
the soldering isn't that bad to do. The issue is getting the stuff down there to do it. It is pretty tight. I think if you were going to do it, I'd get one of those cold flame soldering tool. They work quite well in small places. If you can crimp it, that would be good too, just make sure you seal the crimp area well. Heat shrink will do the trick.

I don't know how true this is but with the wire harness, you basically get the entire wiring harness? Someone correct me if I am mistaken. Good luck and let us know how you make out with it.
 
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Discussion Starter · #5 ·
For future readers with the same problem:
I ordered 2 connectors, part number 82998-12440, image attached, that plug into the transmission revolution sensor plug (90980–11156). Then I got a mechanic to take apart the engine enough to get access to the damaged part, replace it and splice the wires into the harness. The 3 parts (2 wire connectors and the sensor plug) cost about $40 and the mechanic charged me $50 for the work.


82998-12440-Terminal-Repair-Wire-1c.jpg
 

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I have a 2011 Rav4. I had the same problem as some of you. In my case, I had three lamps come on... check engine, 4WD, and Traction Control. I bought a code reader and it read: Code P0793. Intermediate shaft speed sensor. After reading up a bit and looking at some images I started to recognize where many of the engine's sensors are located. I noticed a sensor with it's two wires completely severed. How many rodents are sitting on that little warm perch provided by the engine and chewing on all our intermediate shaft speed sensors?!? Thank you, JuneBug, for the link to anti-rodent tape.

The sensor in question is tucked down around several electrical conduits, at the top and below the car battery. It's in a crevice where I couldn't get both my hands to fit at the same time and I had to use needle-nose pliers to do the work. To take the car battery out I had to remove the plastic guard that runs along the front of the engine compartment. It can be removed by pressing the "button" in the middle of each clip or removing the tab in the middle of the clip. It was less of a hassle than I thought it might be. Although, I do think it's silly to make me remove a bunch of plastic junk just to remove my battery. Once the battery was out of the way I was able to make the repair from there. I could not for the life of me figure out how to get the thing to unclip to make my work easier but I was able to re-attach the two severed connections using wire connectors.

If you search Amazon for "Connector Waterproof Gel Filled", you can find the type of connector I used.

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These connectors have a metal piece inside that cuts through the shielding and makes contact with the wires so you don't have to use strippers and expose the ends. You do have to shove the wires in far enough to reach the contact.

Success! I read somewhere that you have to drive 31 MPH or higher with RPMs under 300 in order to trip the sensor code. I drove to the mountain and back yesterday and the dash lights did not come back on and my code reader reads 0 codes. Also, when the sensor was not working and the dash lights were on, I could not use cruise control or engage 4WD. I would assume the traction control was not working either. Now everything seems to be in working order.

Hopefully my pictures and or story can serve to help somebody in the future. Thank you again to everyone else for sharing.

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