Jump to content
SAU Community

R33 GTST/M Speed Signal from Cluster to ECU

schalachi
 Share

Recommended Posts

schalachi Rookie

schalachi

Posted
Posted

Hello guys. I am new to this website today. I have searched everywhere on the internet. I am good with car wiring, and I have 1 last issue I need to resolve on my ECR33 1994. I have used NDS I and the cable to find and repair an issue successfully. Everything in the car works (except for HICAS; it is being deleted today using GKtech parts). I have noticed when I unplug the HICAS ECU that steering gets hard, so I left it plugged in. Anyway, that's not my issue. My speed reading in NDS I does NOT work (reads 0 kph) however it works on my cluster. I have read that there is a signal from the cluster to ECU. I want to short test this wire to make sure it is not broken but I don't have the means of identification (diagram). Can someone help me identifying the wire from cluster to ECU? Maybe previous owner cut this wire to remove speed cut or something. Thanks

Duncan Grand Master

Duncan

Posted
Posted (edited)

It was extremely common to cut the wire from the dash to pin 53 at the ECU to remove the speed limit, and it doesn't affect how the car runs.

The R33 pin outs should be available by searching on these forums if you want to check

Edited by Duncan
Corrected incorrect pin #
MBS206 Grand Master

MBS206

Posted
Posted
15 hours ago, Duncan said:

It was extremely common to cut the wire from the dash to pin 52 at the ECU to remove the speed limit, and it doesn't affect how the car runs.

The R33 pin outs should be available by searching on these forums if you want to check

Oh man, Id forgotten about the old cut the wire to beat the 180kmh speed limiter, ha ha ha!

schalachi Rookie

schalachi

Posted
  • Author
Posted
18 hours ago, Duncan said:

It was extremely common to cut the wire from the dash to pin 52 at the ECU to remove the speed limit, and it doesn't affect how the car runs.

The R33 pin outs should be available by searching on these forums if you want to check

Hi. Thanks but I have seartched and dont know how to find diagrame here. Can you link it here?

schalachi Rookie

schalachi

Posted
  • Author
Posted
18 hours ago, Duncan said:

It was extremely common to cut the wire from the dash to pin 52 at the ECU to remove the speed limit, and it doesn't affect how the car runs.

The R33 pin outs should be available by searching on these forums if you want to check

Duncan, I am looking at ECU Pinout and its says 53 is VSS not 52. but I havent found a good copy of cluster diagram so I can start tracing 

joshuaho96 Veteran

joshuaho96

Posted
Posted
On 3/21/2024 at 12:57 PM, Duncan said:

It was extremely common to cut the wire from the dash to pin 53 at the ECU to remove the speed limit, and it doesn't affect how the car runs.

The R33 pin outs should be available by searching on these forums if you want to check

In my experience it affects idle, it definitely uses the VSS signal to raise the idle target and adjust the open loop AAC duty cycle or something like that. If you push the clutch in while moving it will idle closer to 1200 rpm before very slowly dropping down to 950 rpm. More often than not you need to get it into neutral and make sure the neutral switch actually triggers by wiggling the shifter in neutral before it'll finally decide to drop the idle down.

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • sinn3r
      R34 Skyline climate control unit transistor

      By sinn3r · Posted

      Hi all,   long time listener, first time caller   i was wondering if anyone can help me identify a transistor on the climate control unit board that decided to fry itself   I've circled it in the attached photo   any help would be appreciated
    • Kinkstaah
      Blue slip

      By Kinkstaah · Posted

      I mean, I got two VASS engineers to refuse to cert my own coilovers stating those very laws. Appendix B makes it pretty clear what it considers 'Variable Suspension' to be. In my lived experience they can't certify something that isn't actually in the list as something that requires certification. In the VASS engineering checklist they have to complete (LS3/NCOP11) and sign on there is nothing there. All the references inside NCOP11 state that if it's variable by the driver that height needs to maintain 100mm while the car is in motion. It states the car is lowered lowering blocks and other types of things are acceptable. Dialling out a shock is about as 'user adjustable' as changing any other suspension component lol. I wanted to have it signed off to dissuade HWP and RWC testers to state the suspension is legal to avoid having this discussion with them. The real problem is that Police and RWC/Pink/Blue slip people will say it needs engineering, and the engineers will state it doesn't need engineering. It is hugely irritating when aforementioned people get all "i know the rules mate feck off" when they don't, and the actual engineers are pleasant as all hell and do know the rules. Cars failing RWC for things that aren't listed in the RWC requirements is another thing here entirely!
    • GTSBoy
      Best place to order Authetic R32 Parts in Japan

      By GTSBoy · Posted

      I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
    • GTSBoy
      Ethanol Content Sensor - Always at 11%?

      By GTSBoy · Posted

      The hydrocarbon component of E10 can be shittier, and is in fact, shittier, than that used in normal 91RON fuel. That's because the octane boost provided by the ethanol allows them to use stuff that doesn't make the grade without the help. The 1c/L saving typically available on E10 is going to be massively overridden by the increased consumption caused by the ethanol and the crappier HC (ie the HCs will be less dense, meaning that there will definitely be less energy per unit volume than for more dense HCs). That is one of the reasons why P98 will return better fuel consumption than 91 does, even with the ignition timing completely fixed. There is more energy per unit volume because the HCs used in 98 are higher density than in the lawnmower fuel.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      No, I'd suggest that that is the checklist for pneumatic/hydraulic adjustable systems. I would say, based on my years of reading and complying with Australian Standards and similar regulations, that the narrow interpretation of Clause 3.2 b would be the preferred/expected/intended one, by the author, and those using the standard. Wishful thinking need not apply.
×
×
  • Create New...