Question for T 45 or anyone with a Vh running in a different car

[craigztoyz]

Hey T45, On your pathy. you said you had a 5v wire in harness that you connected to your ecu r/w 5v sensor wire. Tell me what you can. That 5v wire in q harness did need to be connected to a power wire right? Tring to figure out if that has power out from the ecu, or if it is a supply to the ecu as I think, and requires the lower voltage to feed it. This wire is a P.I.T.A.

I am hearing a few different ideas and knowledge of it, and since you are up and running, what did you do? Thanx

[craigztoyz]

Sorry TMorgan, T45, for the confusion on who has what, all these T's confused me.

[craigztoyz]

Rich with the Benz had labeled the R/w wire in the Q harness (blue connector) as traction control, everythng else shows it as sensor power. I am doing all the searches I can, and doing all the research I can to answer this, but help is needed. Who is up and running, and how did you wire up this wire?

[tmorgan4]

If someone doesn't get an answer to you by later today I can run out to the Pathfinder and check. Everything I've got shows the Red w/ white strip is a 5V sensor power source. ECU pin 48.

[T45]

I'll have to go and look at my notes and wires. I'll try and get back with some info asap, maybe tonight or tomorrow.

[craigztoyz]

Thanx guys. Still looking for more info. Seems # 48 goes to the TPS sensor, and t's in the harness to go out to this wire. I may not need to connect it, or it may be vitally important. But in a week or so, all this info will be known, for all the wiring. Thanx Nick.

[RichZilla]

I'm currently on holiday in Hawaii and my manuals are on my home PC, so I can't look them up. But, I've had a look at my pinouts. Pin 48 in ECCS ECU: TPS sensor supply - 5V. But I can't for the life of me remember if that wire went anywhere else. I do remember checking TPS wires with my multimeter so there might be something funny with those body plugs involving the sensor supply to the TPS. Can't be sure. It will clearly need to come from the ECU and go to the TPS. The ECU is the only thing that will supply 5V. If you've traced that wire to the TPS from pin 48, then it doesn't need to go anywhere else. Have a look at my pinouts and cross check them against the FSM if you're not sure.

One last thing: I wired my car up using these diagrams and have no electrical probs.

Right click, save target as:http://www.freewebs.com/chemic...t.wps

http://www.freewebs.com/chemic...s.wps

http://www.freewebs.com/chemic...t.wps

[darinz]

I can't tell you for sure but the only 5v supply that I found was the supply to the TPS. This is then feed to the TCU to control line pressure etc. I ahven't keep factory ecu or wiring so can't be 100% help.

[craigztoyz]

Now this is the kind of automotive dedication I am all about.

This guy is on ' holiday' in Hawaii and posts to the forum. Rich I hope we meet one day, I am buying you a beer, or whatever.

Thanx for the help. It appears that the r/w feeds the tps from the ecu, and splices the signal out the blue connector to the Trans ecu. So It should be ok to cover and leave unhooked. I am starting it on SUNDAY, so will know more then on how it functions. Now i gotta find the exhaust mani's, lost them in my storage bldg.

[tmorgan4]

Sorry it took me so long to get a definite answer for you. I know answers for this aren't always easy to find especially when wiring up this engine....YET.

So my setup may be a little different than yours. In my stock Pathfinder body harness I had a "5V sensor power supply" wire that connected to the engine harness. I just spliced this wire into the red w/ white stripe wire in the VH harness. The odd thing is it doesn't appear that it ever touches the ECU, even though I have it labled as pin 48. I didn't have a pin out diagram for the ECU with me but I want to see if I have anything connected to pin 48 of my ECU.

If you'd like I can try and get something written up on the wiring ASAP. Or I can give you my phone number and you can call me if you have questions.

[craigztoyz]

Thanx, I took it down to the wiring, and a Nico member in Houston is going through it completely to get a wiring chart made. I'd guess your pathy was auto right? The wire should have gone to the trans ecu. Thanx for the help, hopefully this will work out well. New Problem is the eccs relays, one is neg, one pos for the triggers.

[T45]

I am sorry I haven't gotten back to you. I have been sick and had a contractor over building new stairs out front and I also have 2 babies to take care of 80 percent of the day so I don't get much free time. I'll see if I can get some wire colors for you tomorrow. I got my notes out but it looks like a bunch of jargon and I'd have to get back in the groove to figure out what is what.

[tmorgan4]

I don't get what the problem is on the ECCS relay....Since Nissan seems to keep everything almost identical splicing your old ECCS relay wire into the new one should work. Unless one is positive and one is negative meaning the Q and 300zx use different triggers.

My Pathfinder isn't an auto....always been a 5-speed. The 5V sensor supply went straight into the engine harness.

[RichZilla]

Craig, that is exactly why I remember having to do something with that wire - because I'm using the auto and A/T ECU.