Jump to content
SAU Community

Recommended Posts

I just purchased a pfc for a r33 and installed it all working good execpt its not displaying the speed on the hand controller is this normal? Has anyone else had this problem? did a search but came up empty handed.. dash speedo is working ok however i just installed the amec 300km/h kit and was hoping to check the accuracy of the speedo with the pfc. any help will be appreciated.

Link to comment
https://www.sau.com.au/forums/topic/185738-pfc-speed-signal/
Share on other sites

I just purchased a pfc for a r33 and installed it all working good execpt its not displaying the speed on the hand controller is this normal? Has anyone else had this problem? did a search but came up empty handed.. dash speedo is working ok however i just installed the amec 300km/h kit and was hoping to check the accuracy of the speedo with the pfc. any help will be appreciated.

when you say its not displaying the speed, do you mean

a) it shows the speed on the hand controller display at 0km/hr at all times

b) there is no indicator of km/hr on your controller display?

if its a) i cant help you, but if its b) you just need to set it to display the speed :thumbsup: i havent touched my controller in ages so cant tell you step by step but its simple.

ok the speed diplayed on the pfc handcontroller doesnt move from 0 km/h I have changed the cluster for another one as my tacho was dead but I changed it for another 33 turbo one but thats all I can think of been the problem

"The PFC speed signal is from the gauge cluster so it won't read any differently."

to install the 300k dials you have to pull the needles off and put them back on i want the pfc to display speed so I can check I put them on in the right place

Edited by SevenAngryPenguins

Ok hope this solves it for ya, i had a similar problem. If you still have the speed signal wire connected to the Power FC (wire #53) then it should work for you, just disconnect the battery and connect it back up again after a few mins (you can open a door or pump the brakes a few times to get rid of any power still going through the car). This should do a full reset and hopefully your Power FC should display speed again.

Does your HICAS light come on after a few mins of driving?

pretty sure its connected, wire 53 is "Hicas Diagnostic wire/speed limiter" speed limiter worked with stock ecu

i took my hicas light out when I changed the cluster as im going to remove it shortly (lockbar) and didnt want it glowing maybe i will stick the bulb back in

I'll try a battery disconnect/drain, what exactly am I resetting hi-cas computer? its such a pain in the ass getting to my battery with the stereo mounted to the back board....

replaced hicas bulb and yes it does come on after a few minutes driving and heavy steering too how long did you disconnect for I did for like 20 seconds while the headlights were on but still had the problem. will disconnect for longer this time

cheers

if the hand controller is displaying 0kmh then it dosent have a speedo signal or its scrambled

typical such instances would be smoeones installed a speed cut device and hacked the wiring

or someone has cut wire 53. nothing else would cause this so check wire 53

dont bother with the hicas shit, we know wire 53 is cut, so focus no that

dont bother draining the battery, will achieve a big fat zero

The PFC speed signal is from the gauge cluster so it won't read any differently.

Not true. I have a RB25 motor/tranny in my R32 with a chopped/hybrid speed sensor in the tranny. It now has the cable output going into the dash. Even with the speedo disconected (read broken), my PFC told me how fast I was going and the speedo said bupkiss.

seems that the signal goes to the hicas for the variable steering weight then feeds to the ecu for the speed limiting function this is only a guess is there anyone with wire diagrams that can confirm this

Even with the speedo disconected (read broken), my PFC told me how fast I was going and the speedo said bupkiss.

:thumbsup:

seems that the signal goes to the hicas for the variable steering weight then feeds to the ecu for the speed limiting function this is only a guess is there anyone with wire diagrams that can confirm this

If your keen, the pin outs will be in the service manual for your car.

ok got it working disconnected battery for half hour and is now working go figure....

I have a cap so that might of been holding a bit of charge...

thanks for all the help guys

Told ya :D

Pretty much the reason it does this is because if it has been cut and it accidently earthed out or touched another wire or something it would stopped getting a signal. When u disconnect the battery it resets the ECU and the wire gets the signal again ;) Same thing happened to me while wiring in a SAFC, accidently cut through the speed signal wire and it stopped the speed signal and because HICAS needs a speed signal to operate it malfunctions aswell.

Ahhh the joys of wiring....

neither of mine work :D

-actually the speedo works ,but only after giving the car heaps . like at a track day ... anyideas

PFC reads 0kmh

Dash reads 0kmh

Pretty much the speed signal from the gearbox goes to the dash, then it goes from the dash to the ECU (wire #53) then goes to the hicas computer in your boot. So if your dash reads 0kmh, the problem is obviously lying between the gearbox and the dash.

You said the speedo works after giving the car heaps, so maybe there is a lose wire behind the dash and when u hit a corner hard the wire is getting connected back up or something and working again. Anyway id be looking at the speed signal from the gearbox to the dash.

Hope that helps mate.

maybe I accidently shorted it putting the pfc in was lazy and never disconnected the battery because it such a pain to get in my boot, come to think of it I had a blown 'engine control fuse' what ever that is but it sure as hell made the pfc not work there was some serious clicking going on though

thanks pm-r33

maybe I accidently shorted it putting the pfc in was lazy and never disconnected the battery because it such a pain to get in my boot, come to think of it I had a blown 'engine control fuse' what ever that is but it sure as hell made the pfc not work there was some serious clicking going on though

thanks pm-r33

Haha, no worries champ :D

  • 2 weeks later...
maybe I accidently shorted it putting the pfc in was lazy and never disconnected the battery because it such a pain to get in my boot, come to think of it I had a blown 'engine control fuse' what ever that is but it sure as hell made the pfc not work there was some serious clicking going on though

thanks pm-r33

Hmmm...

The speed sensor on a R32 takes the analog signal from the gearbox then sends that to the HICAS, ECU & Power Steer units.

the 4WD sensors are wheel mounted from memory.

Anyway, if you swapped instrument cluster, the new cluster may be working, but may have a faulty, damaged or missing speed sensor unit inside it! search for my name and speed sensor, there is a post on how to swap the sensors over, if you have the old one still I imagine you should be able to swap sensors and fix the problem in under an hour!!!

If the heavy steering and hicas problem has come about since the speedo swap this would make sense, and also stop the data going to the ECU for your powerfc, but if the problem had been there for a long time i imagine it is your loom that is damaged.

Good luck!!!

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

    • But first....while I was there, I also swapped across the centre console box for the other style where the AV inputs don't intrude into the (very limited !) space.  Part# was 96926-4GA0A, 284H3-4GA0B, 284H3-4GA0A. (I've already swapped the top 12v socket for a USB bulkhead in this pic, it fit the hole without modification:) Basically to do the console you need to remove the DS and PS side console trim (they slide up and back, held in by clips only) Then remove the back half of the console top trim with the cupholders, pops up, all clips again but be careful at the front as it is pretty flimsy. Then slide the shifter boot down, remove the spring clip, loose it forever somewhere in the car the pull the shift knob off. Remove the tiny plastic piece on DS near "P" and use something thin and long (most screwdrivers won't fit) to push down the interlock and put the shifter down in D for space. There is one screw at the front, then the shifter surround and ashtray lift up. There are 3 or 4 plugs underneath and it is off. Next is the rear cover of the centre console; you need to open the console lid, pop off the trim covering the lid hinge and undo the 2rd screw from the driver's side (the rest all need to come out later so you can do them all now and remove the lid) Then the rear cover unclips (6 clips), start at the top with a trim tool pulling backwards. Once it is off there are 2 screws facing rearwards to remove (need a short phillips for these) and you are done with the rear of the console. There are 4 plugs at the A/V box to unclip Then there are 2 screws at the front of the console, and 2 clips (pull up and back) and the console will come out.
    • So, a bit of a side trip, but one that might be interesting for people with JDM cars and japanese head units. I know @Pac previously posted about a carplay/android auto adapter he installed which used the AUX input, and @V35_Paul put in one of the Tesla style units that replace both screens. The option I went with was a Lsait LLT-YF-VER5.87_2 (https://www.alibaba.com/product-detail/Lsailt-8GB-Android-Multimedia-Interface-for_1601187633672.html). Price was $1,150 for a single unit although they are much cheaper if you are willing to buy 2....$857ea. Make you you get the version 2 not version 1, it is faster and has a better UI - this is the manufacturer listing: http://www.lsailt.com/product/348.html. BTW if you've never bought from Alibaba before, don't be concerned....these guys can't stay in business unless they are responsive, ship fast etc, they were excellent (probably faster shipping than most local places) So, this was my task for a lazy Sat afternoon....looks complex but was all done in a few hours (it probably helps that I had some of it apart before so it was a bit familiar). I also decided to add a HD USB drive recorded at the same time and the unit also supports an aftermarket reverse cam (if you don't want to retain factory) and also AV in and HDMI out It looks much worse than it is, in fact in was genuinely all plug and play (no custom wiring at all). This video was pretty good (skipped a few steps), unfortunately they are an Aussie seller but no longer sell this unit (I guess Carplay/AA adapters are easier to install and much cheaper) https://www.youtube.com/watch?v=T5hJfYOB8Dg
    • That still isn't a lot to go on. I don't have a Y50 Fuga Head Unit wiring diagram. I can say that a lot of nissans of that age shared head unit plugs, so if you are in Australia something like this would probably help: https://aerpro.com/app091# You plug that into the car loom, then either plug the head unit ISO into that (if it has ISO), or you buy and ISO adapter harness that you wire in. Bit of stuffing around, but once you have ISO its easy to change things in future.
    • It is a kunfine Android screen . Does anyone know the wirering diagram of the fuga ??
    • just an update to this, poor man pays twice  Tried sanding down the pulleys but it didnt do the trick. Chucked another second hand alternator in the na car which I got for free off my mate and its fixed the squelling. Must have been unlucky with the bearings.    As for my turbo car, I managed to pick up a cwc rb alternator conversion bracket + LS alternator for 250 off marketplace, looked to be in really good nick. Installed it , started the car and its not charging the battery.... ( Im not good with auto elec stuff so im not sure if this was all I needed to do but I verified such by using a multimeter on the battery when the engine was running and I was only getting 12.2v )   I had to modify the earth strap for the new LS alternator , factory earth strap was a 10mm bolt which did not fit the bolt on the LS alternator which was double the size so I cut it off , went to repco bought some ring terminals that fit, crimped it onto the old earth strap and bolted it up to the alternator , started the car and same issue. Ran like shit and was reading 12.2 at the battery.  For a "plug and play" advertised kit thats not very plug and play but alas.  My question is , am I missing something ? Ive been reading that some people recommend upgrading the stock 80 amp alternator fuse to a 140 amp but I dont see how that would stop the alternator charging especially at idle not under load.  Regardless ive pulled it out and am going to get it bench tested by an auto elec tomorrow but it would be handy to know if ive missed something silly or have done something wrong.   
×
×
  • Create New...