Digital Dash
08-11-2014, 09:40 AM
Post: #161
Digital Dash
but first of all, I need to make my rpm work first. Sad
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08-11-2014, 11:08 AM
Post: #162
Digital Dash
Well coming from a KE70 i'm not sure i can help much. Since my shemes are based on the 86 ones....

You can follow the general document about wiring for your car, i guess it will be more apropriate for you.

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08-23-2014, 05:54 AM
Post: #163
Digital Dash
is it possible there is a fuse blown inside? why some labels are labeled "fuse"?
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08-28-2014, 05:16 PM
Post: #164
Digital Dash
(02-22-2013 12:38 PM)pack Wrote:  I have all the information on my notes.... The problem was that the tacho was not working following the schemes on the web.

So, i've found some new schemes and made my tacho work properly.

I also have to get a led light working and have to disassemble my dash.

Maybe Saturday afternoon. If i'll get it done, i will post some pictures of my wiring!

Also i will post a picture of my schemes....

Risca - Stripe
Preto - Black
Branco - White
Verde - Green
Amarelo - Yellow
Azul - Blue
Castanho - Brown

[Image: AEU86 AE86 - Digital Dash]

The tacho was wired at the end... so i'll have to dig again for info!


hi pack, sorry to message you again, but I found this and you said the tach is connected to the end. this end you are talking about is the right plug (facing the front of cluster)? thanks
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08-28-2014, 07:20 PM
Post: #165
Digital Dash
That picture shows the wires that are original from the OEM cluster on the 86.

Branco - white plug
Azul - blue plug

And those are the wire colors and what they do! Smile
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08-29-2014, 09:27 PM
Post: #166
Digital Dash
so that is referring to the analog cluster. Sad
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09-01-2014, 12:45 PM (This post was last modified: 09-01-2014 02:10 PM by choyr.)
Post: #167
Digital Dash
hi again!
so I managed to check again my digital cluster and this is what I found.
[Image: AEU86 AE86 - Digital Dash]
there is a cut at the back of the cluster. I traced the connection and it is connected to -. that must be it why my tachometer is not working. anyway, i haven't tried testing the tachometer because i am busy converting my speedo cable to electronic.

I bought my electronic speed sensor from this.
and I followed on how to convert speedo gear to this sensor from this link.

[Image: AEU86 AE86 - Digital Dash]
When I disassembled the electronics, the speed sensor circuitry has 3 wires, yellow blue and red. red is IG, blue is -, yellow is output. I just connected this to the wiring connection of the electronic speed sensor from this link.
[Image: AEU86 AE86 - Digital Dash]

I tried connecting the electronic speed sensor to the digital cluster and tested it by rotating the gear by hand only. I found the reading changes to 1-4kph. the original speed sensor from the picture (connected at the back of cluster which connects to the speedo cable) has a big ring which has 20 targets for the sensor, meaning it outputs 20 pulses per revolution. and the electronic speed sensor I bought outputs 4 pulses per revolution. what is the part number for the electronic speed sensor that has 20 pulses per rev?

Also, how can I use my existing speed sensor with 4 pulses per rev. I am now using stock T50 transmission, 195/50/15 tires and 4.778 final drive. The digital cluster indicates 637 rev/km. I have 3 speedo gears with different teeth (18, 21 and 22) Can someone do the math? I don't know how. Last time I upgraded to 4.778, I'm using 21 speedo gear teeth and the speed increased in the analog cluster.

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09-01-2014, 03:39 PM (This post was last modified: 09-01-2014 03:40 PM by Ivan141.)
Post: #168
Digital Dash
You can fix the damage to the flexible print with a bit of patience..
Scrape a bit of the traces clean on both sides, and either connect them with conductive glue, or
carefully solder in a jumper wire (add as little heat as possible).

About using a 4-pulse per rev sensor:
You're probably best off modifying the signal using a microcontroller.. Attach the sensor signal to an interrupt, count events per fixed time interval to calculate speed. Use calculated speed to generate a square wave output signal of the frequency you need.

You can also go for a fixed frequency multiplier

Or look for the correct sensor with 20 pulses per rev off course.
The upshot to a microcontroller solution would be that you can finetune it to give
correct speed for any gearbox and final drive combination.

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09-01-2014, 04:34 PM
Post: #169
Digital Dash
I soldered the connection with a solid wire and now it is ok. I found this on the net, and it seems an easy way to correct the pulse. (manual)

I don't have experience with Arduino as of moment. last time i'm coding with ICs were Zilog and C.
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09-01-2014, 04:57 PM
Post: #170
Digital Dash
Arduino is pretty easy due to the huge amount of libraries and examples available on the web.
They are coded in C anyway, so nothing new there. If you use an Attiny, you could easily fit
the print somewhere inside the dash.
The recalibration unit is an otherwise fine solution, but for 92 dollars ex. shipping I would be inclined to
try a bit of tinkering myself.

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