Hi Scotty, I hope you're having a good day. I need some help with the wiring on a MAF connector, I think I have the correct wiring diagram but can't read it
Here are the images of the connector and diagram https://imgur.com/a/7DtkF2d
This is for a 2000 Toyota Hilux 2.4 2RZ and the MAF code is 22204-75020
Thanks in advance
We don't see many Hiluxes here in the US. I was directed to your post a couple of days ago and I didn't have time because I had questions.
Looking at the wiring diagram you posted the 12 volts from the EFI relay comes in on the Red wire to pin 3 of the MAF sensor.
Pin 3 is the center wire.
However, your picture of your MAF connector shows the Red wire is on the end.
So, is that a replacement wiring connector pigtail for the MAF sensor?
Here's the wiring diagram you posted above. I added some text.
That diagram didn't include the two wires for the IAT sensor.
The old 2.4 Tacomas we have here used the same MAF sensor as your Hilux so I pulled up that wiring diagram. The way it's wired looks identical to the wiring diagram you posted.
Pin 3 is Power from the EFI relay (EFI relay isn't shown. It's on the previous page of the wiring diagrams and I'll post the link at the end of my reply). Pin 4 is Ground provided by the computer. Pin 5 is the 0 to 5 volt MAF Signal back to the computer.
As far as the other two wires for the IAT sensor. Pin 2 is the reference voltage and Pin 1 is the computer provided Ground.
So like you originally posted, "I need to know which cable is which, the 2 grounds, 5V, 12V and signal"
Grab a multimeter and identify the 12 volt wire, and the 2 Grounds.
Unplug the MAF wiring connector. Turn the Key on. Multimeter on 12 volts, (20 volt range). Attach the black probe to battery negative and probe that center terminal on the MAF connector with the red lead. It should show battery voltage (12 volts + or - a little)
Now put the test light or multimeter on battery positive and Probe terminals 4 and 1. They should be the computer provided Grounds.
If you want to take it a step further you can remove the MAF sensor and watch the resistance change on your multimeter between MAF's IAT sensor terminals 1 & 2 as the sensor heats up. Check it in your house while it's nice and cool with your AC running. Then take it outside into the heat and note the resistance change.
That will confirm that we're right about MAF sensor terminals 1 and 2 being for the IAT thermistor.
Here's the .pdf link to those engine control wiring diagrams.
https://pdfhost.io/v/8.0iO2rJH_019ECS2RZFE
Thanks for the reply, the connector for the picture is a replacement.
From what I understood and using the same picture as a guide
https://imgur.com/BMEMgnU
1 is ground, 2 is reference voltage but I'm not sure how this reads on a multi tester, 3 is 12V, 4 is ground and 5 is the 5V signal (I'm confused between this and 2)
And is 1 red and green 5 in my connector or green is 1 and red 5?
2 is the 5 volt reference to the IAT and 5 is the MAF Signal voltage
.
The harness side of the connector looks like this
.
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So it looks like your Red wire is #1
Thank you so much. Wired it all and truck is back on the road
You're welcome, Frank. Be sure to save that Engine Controls wiring diagrams .pdf I posted. It may be useful to you in the future
@jack62
unfortunately the link was to a file on your computer, not the web, which nobody but you can access.
You can tell by the "file:" prefix (file:///home/chronos/ ... enginecontrol_2rzfe.pdf )
You would have to upload it to a file host 1st.
thanks, joe. I edited my post with a new link that should work
I don't understand what you want to accomplish. Please describe the problem your vehicle has.
Thanks @mmj
Hi, I need to know which wire goes where for this MAF sensor (22204-75020) it is not wired currently. I need to know which wire does the 5V, 12V, grounds and signal. I used the wiring in a video about a corolla because the sensor lookes the same and ended up frying the MAF I had, now I ordered a new one and don't want to mess it up.
https://imgur.com/a/rVX3jcl#ja40Uph
what happened? MAF sensors are just plug and play
What is the question?
My bad I wasn't clear, I need to know which cable is which, the 2 grounds, 5V, 12V and signal
Where is the image of the wiring diagram? It's not coming up.
The wiring diagram is NOT coming up. What is the tag, name, number???? All I'm getting is a picture of the plug.
The gentleman who can really help you with this is @jack62