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post #1 of (permalink) Old 24th November 2007 Thread Starter
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clio 1.2 fit the rev counters-70% finished

As you have known normally clio MK1 PH3 1149cc does not come with rev counter.

I had source a 1.8 dials and of course, the rev counter not works .(dial.jpg)

Had searched some files of the car, I think ECU does not have rev output, so even the connection is there (PIN8 of 13PIN connector), no outputs.

It will be a easy work if you knows microprocessor programming, so I made a digital rev counter which can measure either the voltages or the rev count.(rev1.jpg, rev2.jpg)
This digital rev counter will replace the original oil temp digi LED. (top of the dials)

But I still want the needle rev counter works.

After some experiment this morning, I obtain some datas of the needle revcounter.

The counter works at 11V-16V(haven't try higher), and the input signal should be a 12V Pulse. The Pulse width does not affect the reading.
The rev counter had a diveder by 2. that means there should be 2 pulses if the crank has a 360 degree turn.

We know the coil is a "waste spark" coils .
PIN 2 will control spark plug 1 and spark plug 4, while PIN 3 control 2 and 3. Thus at PIN 2 or 3, there are 2 pulses for one turn of crane.

So, the next step is to obtain the rev data from the primary side of the HV coils , either pin2 or pin3.

Hope some suggestion about wirings. (From bonnet to the dials.)
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