psycho chicken

I don't expect many people to know what the hell I'm on about, hell I barely do, but bear with me.

I'm now running EEC V, car works perfect with the exception of the trip computer. Average speed is fine, however instant L/100 and average L/100 are out, and I'm guessing DTE will be as well.

Talking to Brendan Mock, he said the reason is the EB ECU data line puts out a 2 digit signal, the EL ECU puts out a 4 digit signal. My trip computer gets this alright, however the decimal place is in the wrong spot so it messes up the reading.

The EB trip comp gets all it's signals from the cluster, with the exception of the signal for injector output, which comes from the ECU. The EL trip comp gets its signals from the one wire on the cluster. This rules out putting an EL trip comp in the EB housing.

My main question, if anyone understands it is; can you somehow convert a 4 digit signal into a 2 digit one? I'm guessing some kind of chip tapped into the data wire.

Does this even make sense? I wouldn't know a 4 digit signal from a 2 digit one if it bit me on the arse.

 

Dellboy999

yes if it is actually a doing as you say, the number could be shifted and chopped by a simple electronic circuit, but would have to be designed and built, some the electronics guru's could do it very easily, but confirming what you have said will be the first step.

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RaceCraft

this is a problem I have noticed when i have done it,, notice your power and ecomony button is also back to front now :)

psycho chicken

Yeah I forgot about the power/econ thing..."hang on why can I do red line shifts in econ mode?"

Muzza

To do the code conversion one would need to know the format and info the 2 digit code is carrying into the ED tripcomp and the format and info the 4 digit code is carrying.
For example, a 2 digit binary code can have 4 combinations but only 3 of these would be data. A 4 digit binary code can have 16 combinations where 15 of these would be data.

The above is for a simple binary code. If it uses Hex or octal codes then there would be thousands of combos.

There would be many methods of tranferring the info and one would need to understand the structure and format of the coding and the info transfer.

The EA-ED uses the pin 34 data wire only for fuel info to the tripcomp.
The EF/EL uses the data (pin 34 in the EL as well) wire to carry temperature gauge, speed and maybe some other info to the instruments, tripcomp and climate control.

A converter, regardless, would most likely need to be processor based which reads the codes and decides what to convert them into and then output the correct codes.

Anyone know anyone at VDO who could provide the code format and structure ?

BTW, I was thinking of trying to install the EL tripcomp electronics into an ED tripcomp housing. Anyone tried that ??

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The XR family ---->
Muzza: a XR8 AU seriesIII...bog standard :)
TBH: (the better half) drives an ED XR6 wagon (Mock Dev 4 160rwkw, JMM extractors, 4 electric windows, Ghia door panels in XR trim, rear head & arm rests in XR trim, Momo s/wheel with Cruise, EL thermos, EBGT wheels, etc) things to come soon = EECV upgrade.