Jump to content
SAU Community

Recommended Posts

  • Replies 63
  • Created
  • Last Reply

Top Posters In This Topic

I have run an R34 GTT HKS loom and HKS FCON piggy back to a stock S1 Stagea ECU . Everything worked , I did not try the Air con though . FCON would not hold a map so I Nistuned an S2 ECU and fitted that . It has several issues , STILL HAS !! ..... PIN 51 NEEDED A RESISTOR - and now gearbox ( AUTO ) has an issue with ECU - or just an issue ! .

I can say that a GTT HKS FCON that was plugged into a stock S1 Stagea ECU using the HKS double plug loom worked - an S2 ECU with a Nistune board fitted RUNS an S1 Stagea but it has gearbox issues = tiptronic and Auto seem conflicted ! this issue is under investigation so i will update when i know ..

ok I have been given info and someone has tried it. its about a s1 stagea and running a r34gtt auto ecu. he has had it in and running fine on his s1 awd. can anyone confirm that this will work

Doubt that it would work on an auto - do you know if it was a manual S!?

I have run an R34 GTT HKS loom and HKS FCON piggy back to a stock S1 Stagea ECU . Everything worked , I did not try the Air con though . FCON would not hold a map so I Nistuned an S2 ECU and fitted that . It has several issues , STILL HAS !! ..... PIN 51 NEEDED A RESISTOR - and now gearbox ( AUTO ) has an issue with ECU - or just an issue ! .

I can say that a GTT HKS FCON that was plugged into a stock S1 Stagea ECU using the HKS double plug loom worked - an S2 ECU with a Nistune board fitted RUNS an S1 Stagea but it has gearbox issues = tiptronic and Auto seem conflicted ! this issue is under investigation so i will update when i know ..

Pretty sure it has been stated many times S2 ecu into S1 auto won't work.

I have tried a manual r34 gtt ecu in my s1. It started and ran no problem's. When warm the car had a slight miss I think bit started to go the longer I let it run. I was not able to test ac as my climate control is out of the car atm. The car that the guy I know has done it before was a s1 auto awd

I have tried a manual r34 gtt ecu in my s1. It started and ran no problem's. When warm the car had a slight miss I think bit started to go the longer I let it run. I was not able to test ac as my climate control is out of the car atm. The car that the guy I know has done it before was a s1 auto awd

I presume your car is a manual transmission?

Sorry to hijack but I'm wondering if anyone can confirm the ECU pinouts for 260rs S1 are the same as r33gtr or not. There doesn't seem to be a specific 260rs service manual anywhere.

Is s2 260rs ecu different to series 1 ecu?

  • 10 months later...

well....keeping in mind there are at least 3 ecu pinouts and mine was the weird one.....I had to change from negative switch to positive switch for the compressor in my car, just modified the wiring at the relay. I don't have the detail of which pin it was but I don't remember having to change it...was a few years ago.

So start with checking what you have and what you need in the AC switch. P74 of the stagea manual shows pin 14 is the one for the first wiring type.

Looking at each diagram, my stagea doesn't have the refrigerant pressure switch at pin 57 like the r34 ecu or aux fan control relay at pin 78. How would I go about adding that to the loom to get the ac to work? Everything else as far as ac relay control signal, ac signal switch and overrun clutch solenoid (unsure if this affects ac). So it must be the pressure switch and/or fan relay control as far as I can see that is missing. can I add this in or do I have to bypass it somehow? really want to get this sorted because it's soo hot here in the desert and I have to bus my kids about a bit too.

Edited by fmlycar

It would be good to know what loom you have. Do you know the number of the original ecu? If it is the most common type then

pin 14 with G/R wire should be the air cond relay control signal

pin 21 P air cond switch signal

pin 27 outside temp sw signal 1

pin 28 outside temp sw signal 2

Do you have all of these working?

Do you know that the aircond was working before the conversion was done?

My Stagea has a GTT Link installed and the aircond worked fine (I know that doesn't help you!)

I don't have the original ecu. Its a 97 model but not sure on exact build date. Previous owner assured me it was working before the engine was removed and rebuilt, was never regassed (has been pressure tested and regassed last week) or used afterwards and had power fc in there since. Is there any other way to tell what loom I would have?

Edited by fmlycar

yep, if yours is 97 it is late type (same as R34 GTT I think). Middle model is August 96 (mine) and the first model was prior to that. Workshop manual shows the first wiring layout, I understand the late type is identical to 34 gtt but I'll let someone else confirm.

Alternatively if you post up your VIN (or pm to me if you prefer privacy) someone with FAST can look up your ECU part number to confirm

lol yeah sucks to be you. or me.

honestly I think you need someone to trace it through...I don't have the details of all the changes but there were a bunch of differences between 0V310 ECUs and the R34 loom.

Is yours running OK? Where other changes required? If it's just the AC check what trigger the compressor is expecting by either earthing or applying 12v (via a 10A fuse)

Car runs perfectly. Was just recently retuned by jaustech in Adelaide and made 240rwkw. I bridged the ac relay in the engi e bay and compressor kicked in but ac still didn't get cold. Really frustrating as I'm not confident I could get it fixed without the wiring diagrams or something to explain what needs to be done first.

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

    • Wheel alignment immediately. Not "when I get around to it". And further to what Duncan said - you cannot just put camber arms on and shorten them. You will introduce bump steer far in excess of what the car had with stock arms. You need adjustable tension arms and they need to be shortened also. The simplest approach is to shorten them the same % as the stock ones. This will not be correct or optimal, but it will be better than any other guess. The correct way to set the lengths of both arms is to use a properly built/set up bump steer gauge and trial and error the adjustments until you hit the camber you need and want and have minimum bump steer in the range of motion that the wheel is expected to travel. And what Duncan said about toe is also very true. And you cannot change the camber arm without also affecting toe. So when you have adjustable arms on the back of a Skyline, the car either needs to go to a talented wheel aligner (not your local tyre shop dropout), or you need to be able to do this stuff yourself at home. Guess which approach I have taken? I have built my own gear for camber, toe and bump steer measurement and I do all this on the flattest bit of concrete I have, with some shims under the tyres on one side to level the car.
    • Thought I would get some advice from others on this situation.    Relevant info: R33 GTS25t Link G4x ECU Walbro 255LPH w/ OEM FP Relay (No relay mod) Scenario: I accidentally messed up my old AVS S5 (rev.1) at the start of the year and the cars been immobilised. Also the siren BBU has completely failed; so I decided to upgrade it.  I got a newer AVS S5 (rev.2?) installed on Friday. The guy removed the old one and its immobilisers. Tried to start it; the car cranks but doesnt start.  The new one was installed and all the alarm functions seem to be working as they should; still wouldn't start Went to bed; got up on Friday morning and decided to have a look into the no start problem. Found the car completely dead.  Charged the battery; plugged it back in and found the brake lights were stuck on.  Unplugging the brake pedal switch the lights turn off. Plug it back in and theyre stuck on again. I tested the switch (continuity test and resistance); all looks good (0-1kohm).  On talking to AVS; found its because of the rubber stopper on the brake pedal; sure enough the middle of it is missing so have ordered a new one. One of those wear items; which was confusing what was going on However when I try unplugging the STOP Light fuses (under the dash and under the hood) the brake light still stays on. Should those fuses not cut the brake light circuit?  I then checked the ECU; FP Speed Error.  Testing the pump again; I can hear the relay clicking every time I switch it to ON. I unplugged the pump and put the multimeter across the plug. No continuity; im seeing 0.6V (ECU signal?) and when it switches the relay I think its like 20mA or 200mA). Not seeing 12.4V / 7-9A. As far as I know; the Fuel Pump was wired through one of the immobiliser relays on the old alarm.  He pulled some thick gauged harness out with the old alarm wiring; which looks to me like it was to bridge connections into the immobilisers? Before it got immobilised it was running just fine.  Im at a loss to why the FP is getting no voltage; I thought maybe the FP was faulty (even though I havent even done 50km on the new pump) but no voltage at the harness plug.  Questions: Could it be he didnt reconnect the fuel pump when testing it after the old alarm removal (before installing the new alarm)?  Is this a case of bridging to the brake lights instead of the fuel pump circuit? It's a bit beyond me as I dont do a lot with electrical; so have tried my best to diagnose what I think seems to make sense.  Seeking advice if theres for sure an issue with the alarm install to get him back here; or if I do infact, need an auto electrician to diagnose it. 
    • Then, shorten them by 1cm, drop the car back down and have a visual look (or even better, use a spirit level across the wheel to see if you have less camber than before. You still want something like 1.5 for road use. Alternatively, if you have adjustable rear ride height (I assume you do if you have extreme camber wear), raise the suspension back to standard height until you can get it all aligned properly. Finally, keep in mind that wear on the inside of the tyre can be for incorrect toe, not just camber
    • I know I have to get a wheel alignment but until then I just need to bring the rear tyres in a bit they're wearing to the belt on the inside and brand new on the outside edge. I did shorten the arms a bit but got it wrong now after a few klms the Slip and VDC lights come on. I'd just like to get it to a point where I can drive for another week or two before getting an alignment. I've had to pay a lot of other stuff recently so doing it myself is my only option 
    • You just need a wheel alignment after, so just set them to the same as current and drive to the shop. As there are 2 upper links it may also be worth adding adjustable upper front links at the same time; these reduce bump steer when you move the camber (note that setting those correctly takes a lot longer as you have to recheck the camber at each length of the toe arm, through a range of movement, so you could just ignore that unless the handling becomes unpredictable)
×
×
  • Create New...