Originally Posted by ant7 (Post 12491842)

Interesting!
Any idea why it was limited to certain markets ?
Ant.

Originally Posted by mysocal911 (Post 12491874)

Datasheet - https://www.alldatasheet.com/datasheet-pdf/pdf/619872/TI1/ADC0808CCN.html

Vcc (+5V) is pin 11. Various semiconductor suppliers produced this part.

Originally Posted by zuch (Post 12491857)

I believe the up-shift light was added to the US market cars in an attempt to improve fuel efficiency. The idea being if you shift to a higher gear sooner you will burn less fuel.

Originally Posted by wazzz (Post 12491856)

Cheers Ant,
Currently trying to decipher and understand as much as I can from the Motronic schematics. My circuit analysis ability has gone long ago and those schematics are not easy to follow. Trying to annotate them for reference.

Does anybody know why the ADC appears not powered? VCC is connected to ground via a 4.7k resistor. Or is it powered via VREF+ and VREF-?

I may open a dedicated thread later to ask other questions, hoping that guys like Dave, Ingo, Sal and others will chime in. :D

Originally Posted by ant7 (Post 12492238)

Totally understand your frustration with the schematic, I spent many hours going over it when my own ECU started doing odd things, I did learn quite a bit, although I still have the issue with my original ECU the time spent did help me diagnose an issue I had with another ECU I initially got for spares, but managed to get it up and running, I also realised there are various mistakes!
Ant.

Originally Posted by wazzz (Post 12492235)

Dave, thanks. But I did download and browse the TI datasheet for this ADC before I asked this (probably) stupid question.

Here is what I mean; circled in red. No +5V power supply to pin 11, only a 4.7k pull down to ground.
All other +5V lines are pull-ups, except for VREF+ (pin 12) which is connected to +5V through a 0R resistor (again a strange 0R resistor labelled B11).

So how does that ADC IC get its power supply? Is something missing on the schematic?

http://forums.pelicanparts.com/uploa...1751614919.jpg

Originally Posted by ischmitz (Post 12491955)

I would look here http://www.megamanual.com/

It’s an open source EFI project and has tons of information on how various algorithms determine fueling and spark timing. Lots of good information.

Originally Posted by wazzz (Post 12492247)

Ant, thanks. If you remember of any errors, please let me know. I'll fix them on the schematic and will be pleased to share my own "fixed" and annotated version with you and anybody here.