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-   3rd gen T4Rs (https://www.toyota-4runner.org/3rd-gen-t4rs/)
-   -   What does this wire go to? (https://www.toyota-4runner.org/3rd-gen-t4rs/311940-what-does-wire-go.html)

Brandt 09-24-2023 04:26 PM
What does this wire go to?
 
Hey y'all,

I'm toward the end of the months' long saga of replacing my 5vz. Installation of the new engine is next weekend, and I've discovered that a connector was pulled off of a wire. Connector is circled in the lower right corner of the image. Could someone please help me identify where this goes so I can order a replacement?

https://imgur.com/a/aHuCMfa

Oddly, I can't get the image to show up in the post, so a link will have to do

Brandt 09-24-2023 09:20 PM
Thanks Brillo!
So, to clarify, is this the oil temp sensor connector?

Brandt 09-24-2023 09:43 PM
Hm. I'm not able to get any hits for 5vz "ecu temperature sensor". Everything I find points to the coolant temp sensor. Would they use the same type of connector? If so, my real issue is solved.

TheDurk 09-25-2023 12:03 AM
Quote:
Originally Posted by Brandt (Post 3812964)
Hm. I'm not able to get any hits for 5vz "ecu temperature sensor". Everything I find points to the coolant temp sensor. Would they use the same type of connector? If so, my real issue is solved.
There are two coolant sensors. One goes to the ECU. The other goes to the temp gauge. Plus one on the transmission (slush box only).

The ECU one is this puppy here:

1991-2010 Toyota Engine Coolant Temperature Sensor 89422-35010 | Toyota Parts

[Incorrect info deleted. See newer post downthread.]

Please, ALWAYS give your year, engine, and 4WD/RWD and auto/5SP when requesting wiring help. Without that, anything I give you could be wrong. A close-up of the end of the subject plug would also have been real helpful.

Brandt 09-25-2023 01:11 AM
Thanks for the clarification, TheDurk.

The ECT/ECU Temperature Sensor naming difference was throwing me off. But it does sound like we are talking about the same thing.

You're right, I neglected to provide those details. 99 5VZ 4wd 5sp. I'll remember for next time.

Unfortunately, it's the end of the plug that was ripped off and I'm trying to repair. I can't find the original, (lost amidst other components, I suspect) so I'm hoping that the photo of a stock harness would provide enough context.

Thanks again to both of you.

Brandt 09-25-2023 09:45 AM
You're good, mate. I just didn't realize they were the same sensor.
Cheers!

mtbtim 09-25-2023 02:57 PM
Now I feel the need to chime in. The ECU coolant temp sensor comes off the passenger side of the harness. What the OP has circled is the driver side of the harness. Based off my examination, that plug that is circled goes to the front differential actuator.

phattyduck 09-25-2023 03:07 PM
Quote:
Originally Posted by mtbtim (Post 3813033)
Now I feel the need to chime in. The ECU coolant temp sensor comes off the passenger side of the harness. What the OP has circled is the driver side of the harness. Based off my examination, that plug that is circled goes to the front differential actuator.
That looks right. Very easy to miss when pulling a motor since it is so far down there.

edit to clarify: That is for the ADD position switch, not the the ADD VSVs that are up on the inner fender.

-Charlie

mtbtim 09-25-2023 05:16 PM
Quote:
Originally Posted by phattyduck (Post 3813036)
That looks right. Very easy to miss when pulling a motor since it is so far down there.

edit to clarify: That is for the ADD position switch, not the the ADD VSVs that are up on the inner fender.

-Charlie
Yep, that plug is very easy to miss.

When I looked at the comments to the OPs question, I was like HUH? The ECT (Engine Coolant Temp) sensor plug comes off the harness on the passenger side and the plug the Op circled is clearly on the driver side all by itself. On the passenger side, the Knock Sensor plug and the ECT plugs are right next to each other.

Brandt 09-25-2023 11:17 PM
I see references to "T" tab and Split tab variants of this connector. Does anyone know whether there is a universal connector available for this repair?

phattyduck 09-26-2023 01:06 PM
Quote:
Originally Posted by Brandt (Post 3813122)
I see references to "T" tab and Split tab variants of this connector. Does anyone know whether there is a universal connector available for this repair?
There's a small sub harness between the position switch on the ADD actuator (on the tube coming off the front diff towards the passenger side). You just need to repair that sub harness. Do it while the motor is out, otherwise access is very difficult.

I had damage in that same area on the parts truck that I got all my 4WD swap parts from (damaged by previous owner who took the engine - I wanted the rest of the truck for the 4WD parts...).

-Charlie

Brandt 09-27-2023 12:32 AM
Unfortunately, I don't have any closer photos, or from a different angle. The challenge I'm faced with is that the connector was pulled from the wire and I'm unable to find where it ended up. So I have no direct comparison to find a matching replacement part. If I had that part, I'd probably just relieve the pins and pull them out, then re-terminate the cables and reuse the connector.

I did find this ebay auction. 4Runner ADD Differential Disconnect Vacuum Switch Valve CONNECTOR PLUG Pigtails | eBay
I wonder whether the t tab variant could be considered universal.

Any feedback on this?

mtbtim 09-27-2023 01:47 AM
Start watching this video at play time 26:25 to see how to access that wiring haness on the top of the differential that got damaged. You just have to disconnect the breather hose from the driver side fender well, disconnect the two vacuum lines at the switching valves on the driver side fender, disconnect the electrical connector at the ADD actuator and then take out the two bolts.

<iframe width="560" height="315" src="https://www.youtube.com/embed/bOOxfDFUFsA?si=lfSeXRKj9L5g-vPH" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>

mtbtim 09-27-2023 02:01 AM
Quote:
Originally Posted by brillo_76 (Post 3813107)
Yup I was wrong. It's the front fender that Charlie clarified. I thought the ecu coolant came off the passenger side of the injector harness not drivers.


That definitely needs corrected on the on this thread. :)

Sent from my SM-A536V using Tapatalk
Huh? What do you mean it's the front fender that Charlie clarified? Maybe you missed my comment. I identified for the OP that the damaged connector goes to the ADD actuator on the front differential. Charlie confirmed what I said. What Charlie said is it's NOT one of the connectors for the vacuum switching valves on the driver side fender well.

The ECU coolant temp sensor DOES come off the passenger side of the engine wiring harness, not the driver side.

Dude, what have you been smoking? Let me know because I'd like some so I could do some hallucinating as well.

Brandt 09-27-2023 08:59 AM
Quote:
Originally Posted by Brandt (Post 3813280)
Unfortunately, I don't have any closer photos, or from a different angle. The challenge I'm faced with is that the connector was pulled from the wire and I'm unable to find where it ended up. So I have no direct comparison to find a matching replacement part. If I had that part, I'd probably just relieve the pins and pull them out, then re-terminate the cables and reuse the connector.

I did find this ebay auction. 4Runner ADD Differential Disconnect Vacuum Switch Valve CONNECTOR PLUG Pigtails | eBay
I wonder whether the t tab variant could be considered universal.

Any feedback on this?
I think caused confusion with the photo link. The photo isn't of my specific harness, it's just an example photo for illustrative purposes. My wires aren't cut after the connector joint as in the photo. The connectors were disconnected during removal prep, and the part of the connector that was on the harness side is what was pulled off the wire. So one half of the connector is still on the car, and the other is missing.


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