Jaycar speedo corrector on a Rodeo

[Utemad]

Hi all,

Thought I would save someone some trouble.

I just installed the KC-5380 speedo corrector kit on my 2.6L petrol fuel injected Rodeo 1997 model. Instead of completing procedure 1 & 2 you can just fit the following:

Procedure 1: 'Install LK1 at X'
Procedure 2: 'Install R1 and LK3 at X'

Also LK2 is "F" of course as we are in the habit of fitting larger tyres here

The speed sense wire is the blue/black one exiting the gearbox with another 2 wires. I broke into it in the engine bay on top of the driver side inner guard and then ran the wires inside the cabin to the speedo corrector. I would have preferred to do it all inside the cabin and I'm sure you can but this was the easiest spot to do it.

For 31in MT/Rs I set mine on 5%. However the speedo still reads about 1-2km/h slow so I will set it to 6% tomorrow and see how that goes.

Hope this helps someone.

[Westoztroopa]

Cheers for that. Mines now about 10 - 12% out I reckon so I will definately be looking at this. How much does the unit set you back if you dont mind me asking?

Noel

[Utemad]

I paid $28.77+GST from Electus however it is $44.95rrp from Jaycar. Plus about $2 for a small zippy box.

I saw over the counter jobs for $200+ from memory.

Well worth the time and dollars.

[DAZZ]

I gather these are fairly adjustable. Is there more than one setting cos my road tyres are bigger then std and my off road tyres are bigger again. These are very much cheaper then the VDO or Marks kit.

[Utemad]

There is only one adjustable setting. You can mount a switch so it is either standard speedo or adjusted reading speedo though. Which just involves switching the unit in or out of the circuit.

Perhaps you could calibrate for your road tyres if they are the ones you use the most.

However AFAIK you could get two jaycar kits to do what you want to do and still save a wad of dough over any other over the counter unit.

Actually the way the unit is calibrated is by percent. There are two rotary switches on the circuit board. One adjusts in 10% increments and the other in 1%. So if you mounted the circuit board in an easy to reach location you could just turn the switches when you change tyres. I think this would be the way I would do it.

I'm making another one for my friends Jimny as we speak.

[DAZZ]

Sounds like a plan!!!!! Thanx for the info......

[Utemad]

This is the one I just made. The two blue squares on the RHS are the rotary switches. The circuit board measures 78x46mm and is cut to fit into the smallest jiffy box.

I took this picture with my phone if your wondering why it is so poor quality

[Utemad]

I just got around to fitting a switch so I can easily switch between standard speedo and 31in speedo.

I thought all I had to do was put in a SPDT switch so I could switch the output from the speed sensor from the corrector input straight to the speedo input. This leaves the output from the corrector still wired to the speedo regardless of switch position. However as it turns out I needed a DPDT switch so as well as being wired as above I had to cut the output of the corrector when I wanted to use the standard tyre position.
I tried cutting the power to the corrector instead of the output but that didn't let the standard position work either.

So basically to make it work you need to cut the input and output of the corrector and join the original speedo/speed sensor wire to make the standard speedo work. If you don't do this your speedo will read 0km/h when you switch to standard tyre size.

So it all works now. Time to sell it

[V6XtraHilux]

Utemad,
I have the same problem as you had, I was using a DPDT switch and getting the 0km/hr on the speedo, on my hilux.

Can you maybe explain the wiring changes again, I wasnt able to clearly work out what you were talking about, mb im just too dumb!! haha

Any help would be appreciated.
Cheers.

[Utemad]

From memory I connected it up like this. Looking at the bottom of the switch

blank............ * * speedo input
speedo input * * VSS
CB output..... * * CB input

This will cut the input and output of the corrector box (CB) when you switch it to standard speedo.

Since installing this switch I've had my standard tyres on once and did about 100kms on them. Well worth the effort

[V6XtraHilux]

Thanks Utemad, but I must be too stupid, cos I still cant figure out ur wiring.

You obviously have a DPDT switch, one line coming in from the speedo input, im guessing the wire from the speedo thingo on the transmission(?), wired thru the switch to a blank? or do u mean no wire to this connection?
VSS (? wire going to the dash speedo display?) wired to the speedo input on other side of switch?
then the bottom is the corrector box wired thru the switch which doesnt actually do ahything?
So if the switch is flicked to the top, the speedo input runs thru to the other speedo input, and when flicked to bottom, the CB input goes straight thru the switch with no change to the speedo display.

Am I anywhere close??

Thanks.

[Utemad]

Hi Mr V6. Don't worry about your wiring problems. I wouldn't expect anything more from a Toyota driver

The deal is that 'blank' has no connection. So with the switch in the up position it will connect the VSS (Vehicle Speed Sensor) wire to the speedo input. This will give you standard speedo operation.
With the switch in the down position it connects the VSS to the input of the CB (Corrector Box) as well as the output of the CB to the speedo input.

The VSS wire is the wire that comes out of your gearbox sensor and into your computer. Some people have said you shouldn't cut into this wire and instead you should cut into the wire that goes from your computer to your speedo. However I would think that it is best for your vehicle if it knows how fast it's going instead of just telling you how fast it's going if you get what I mean. I have had no issues with my car or my friend's Jimny by cutting into the wire between the gearbox and the computer.

Hope this clears it up. Feel free to ask any more questions.