Speed on Apexi RSM

[GTR032]

Just installed a Apexi RSM on my 32 GTR, can't get the car speed to come up yet. Revs are fine, anyone know what the settings have to be? Calibration?

Thanks

Jono

[51jay]

have you connected up the speed input........splices into line53 out of your computer as i remember

[GTR032]

Yeah I have, On one of the 'SPI' (speed pulse something) settings the speed works, but it starts at 100km/h and jumps around a fair bit. I'm getting the english instructions tonight so that might figure it out for me.

[mtopxsecret6]

Just a slight diversion.. does the apexi rsm need to be calibrated? because it seems that mine is reading 10km under than the dash speedo? Any ideas?

[RadiuM]

there's something in the book about working out your tyre diameter and then putting that value in. I know mines accurate as i went through a multinova and got done for the exact speed it was reading

Shaun

[PranK]

my RSM is set to SP2 if that helps?

[PranK]

dang.. just noticed how old this thread was...

[51jay]

Yes it needs to be calibrated precisely if you want it to be accurate. speed comes from rolling wheel diameter (wheel centre to ground x 2) from memory. Factory stock is 1 or 100%. I think mine worked out at 102%. Or it could be rolling circumference.

[aza]

have a look at

www.apexi-usa.com

[LastTemptation]

my rsm is reading half the speed i do. if im going 60k's it will say 30. thats half yer?

Measure tyres hay!!?

[mtopxsecret6]

ok, tyhanks for the replies guys.. will take a look at it.

[mtopxsecret6]

Just anopther question.. does anybody know which wire is the spped out wire? I know the rev wire is the white wire.. But the manual on the net at apexi does not say which wire is the speed out wire? Has any body got a hard copy of the instructions and could help me out? Thanks..

[aza]

if this is going in to a rb20

try www.rb20det.com

there is a ecu print out that will show u what every wire is

[Birnie]

There IS a setting for this n the etc. menu somewhere.

When i had mine installed it never went over about 5 kms/hr.

Went and changed the value of ....i forget....but it then read about half of what i was doing ie......read 40 when doing 80, then changed the same value again and it was spot on....except for adjusting to about 104% for fine adjustment.

It says in the instructions somewhere and it's to do with how many pulse each car sends per whatever. It's VERY easy once you find out which value it is.

[mtopxsecret6]

Yeah, i have that sorted out.. The rsm reads exactly what the dash says, but im now after the speed out wire from the rsm.. to an external device.. ie radar detector etc.. anyone have the instruction which says which wire is the speed out wire? I know the white wire is the rpm wire.. which wire is the spped wire?

Thanks

[strutto]

which wire is the speed wire?

The US manual doesn't list a colour for the speed output although something in the back of my head says Grey?

If we look at the Jap manual though, there is a japanese character next to the speed output wire where the colour should be shown in the US manual. It appears that this info has been lost during translation.

Someone who can read japanese should be able to tell us what colour the attached character stands for.

[mtopxsecret6]

Cool, thanks buddy, we are getting closer!

[strutto]

Just found this. Looks like it is grey!

[51jay]

OK...here we go

Red.........Ignition/Power

Yellow.....RPM signal

Black.......Ground

Purple.....Speed Signal...Loom side

Pink/Peach..Speed Signal...ECU side

White......Speed/RPM warning output

Grey........Speed/RPM warning output

2 wires not used

Brown....SP2 output??

Blue.......SP2 Input??

In the Japenese instructions for ECU hookup use diagram N4_c on page24.

Top row 7-2 is wire 50....ECU ground...Black

The other one is wire 7....RPM Signal...Yellow

Bottom row IG is wire 59....Power Supply....Red

next one is Wire 53....Speed sensor....cut it...Purple to loom side...Pink/Peach to ECU side

My APEXi RSM worked fine

[mtopxsecret6]

You guys beat me too it! I was going to write up the full wiring colour coding.. damn it! Anyways, when you use either the rpm or speed out warning.. you need to use a relay inline to your item. I my case, i used an led, with a flasher unit i made to make it flash like a pivot shift etc. It works fine and dandy!