Jump to content
SAU Community

Recommended Posts

spacer.png spacer.png

Hey guys just wondering if I can get some clarification on this refrigerant pressure sensor wiring. I bought a 3 pin pigtail to wire in a refrigerant pressure sensor and I just want to make sure I'm reading the schematic and connecting it properly. My ECU doesn't have anything in pin 57 so I put a pin in and ran it to the WHITE wire on the pigtail. Then pin 48 to the BLUE wire and connected the GREEN wire to ground. After doing this I went for a drive and my CEL came on. The car also had jumpy acceleration. Since pin 48 is also the power source for the throttle position sensor I'm wondering if I messed up or reversed the wiring somehow. Any help is appreciated, thanks!

Well, what you've done looks correct, but only if the sensor has the same pinout as the stock sensor. If it's not a stock or stock equivalent, then there's some chance that you've got two or more of those switched, which could be anything from non-damaging to let-some-smoke-out.

  • Like 1
24 minutes ago, GTSBoy said:

It's not the connector I'm concerned about - it's the sensor itself. The connector is agnostic - doesn't care what you're doing with it. The pins on the sensor need to match what the ECU thinks it's pins connect to.

Right, sorryー I'm an idiot, of course it's the sensor not the connector 😳 So I just did some digging and found out the part number I was given by someone at Nissan is actually the wrong part number....so obviously it doesn't work properly and I probably fried something in the process. 

With that diagram you posted first, often the adjacent section of the workshop manual will confirm what the wires actually do as well. Of the 2 wires between the sensor and ECU I assume 1 is power supply, probably 5v and the other is signal to the ECU, but it isn't possible to tell which is which from the diagram. 

Unfortunately if you have grounded the ECU 5v output by accident you might have damaged the ECU (or if you are lucky just popped a fuse).

Why does the ECU not have these wires, was it a non-AC car or a different ECU to factory?

  • Like 1
13 minutes ago, Duncan said:

With that diagram you posted first, often the adjacent section of the workshop manual will confirm what the wires actually do as well. Of the 2 wires between the sensor and ECU I assume 1 is power supply, probably 5v and the other is signal to the ECU, but it isn't possible to tell which is which from the diagram. 

Unfortunately if you have grounded the ECU 5v output by accident you might have damaged the ECU (or if you are lucky just popped a fuse).

Why does the ECU not have these wires, was it a non-AC car or a different ECU to factory?

It's an engine swapped car that I knew about when I imported it. What I didn't know is that whoever swapped the engine didn't swap the harness....so it's an RB25 with an RB20 harnessー a complete shit-show to say the least. For the most part everything runs fine (until I tried to hook up this sensor 🤦‍♀️) I feel like the ECU is fried due to the incorrect part number I was given but I'm able to get another one from a friend so once I order the correct refrigerant pressure sensor it should be ok....

  • Like 1

And double double triple double check the pins on the sensor, making sure you understand the orientation of the connector view on the diagram and hopefully the pinout on the sensor itself is documented on its paperwork, for comparison and triple double quadruple double checking.

  • Thanks 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • For these last 7 years of ownership, I've always had to use a small scissor jack under one of the front tow hooks to raise the front just enough so my low-profile jack fits under to reach my subframe jack point. I'm beginning to get annoyed of always having to do this. Are there any lower low-profile jacks that fit under the gtr lip on a dropped car?
    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
×
×
  • Create New...