Pfc.. Speed Signal

[SevenAngryPenguins]

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.

[SLY33]

  SevenAngryPenguins said:

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 i havent touched my controller in ages so cant tell you step by step but its simple.

[Darius]

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

[SevenAngryPenguins]

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 September 19, 2007 by SevenAngryPenguins

[PM-R33]

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?

[GeeTR]

I was of the opinion #53 comes from the hall effect sensors on the wheels (feeds ABS, HICAS and ATTESSA)

The clusters signal comes from the gearbox... could be wrong though

[SevenAngryPenguins]

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....

[SevenAngryPenguins]

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

[paulr33]

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

[SevenAngryPenguins]

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

[Cjmartz2k]

  Darius said:

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.

[SevenAngryPenguins]

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

[GeeTR]

  Cjmartz2k said:

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

  SevenAngryPenguins said:

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.

[Craved]

neither of mine work

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

PFC reads 0kmh

Dash reads 0kmh

[PM-R33]

  SevenAngryPenguins said:

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

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....

[PM-R33]

  Craved said:

neither of mine work

-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.

[SevenAngryPenguins]

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

[PM-R33]

  SevenAngryPenguins said:

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

[Keeper]

  SevenAngryPenguins said:

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!!!

[SevenAngryPenguins]

hey man got it working it was the hicas computer, i think i mentioned that in post 10...... but cheers anyway mate its always good to learn of new faults