That was pretty much how I figured it too. Some of the diagrams do show a databus from the ECU but none of the wires going to the car wiring have databus-style screening. So here's hoping the PATS is a simple connection to the ECU - if at all.
Some forums have mentioned swapping the 3-wire fuel solenoid for a single wire version from a non-PATS mechanical injection system. It could be that PATS has an output directly to the three-wire unit; if so, a swap should be straightforward. Other PATS circuits work without ECU involvement; the ECU switches the +12v side of the relay, PATS controls the GND side. I'm still at about 15 unidentified wires (not had time to look over the weekend). About half of these go to the engine bay fuse/relay box, the rest go straight to the ECU. Not too bad. That 15 includes some simple ones, like tacho output, vehicle speed for electronic speedo, ign+, start, etc. I also haven't yet found some of the instrument warning light wires e.g. headlamp main beam, sidelights, glowplug warning light, oil pressure, water temp etc. The hardest part about it is that I'm working from the wrong end i.e. searching the wiring diagrams looking for wire colours which match what I have in my hand. Not easy when Ford re-use the wire colours for different things! I probably ought to try going the other way - figure out what circuits are needed for the engine, and then seeing if any of the wires I have match those. And of course it's made worse by having everything as diagrams rather than searchable text. Still, I'm making progress. TonyV. On Jul 18, 2:56 pm, Jim Hearne <[email protected]> wrote: > On the remote keys the pats is inside and there is no red dot. > As long as it was external and the ecu didn't talk to the Pats module > with a comms link you should be able to bypass it. > > Jim -- You received this message because you are subscribed to the Google Groups "Quantum Owners Group" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/quantumowners?hl=en IMPORTANT NOTE: All information presented herewith is provided on an "As Is" basis, without warranty or the implication thereof. Neither the Quantum Owners Club nor the individuals associated with the Quantum Owners Club or in the preparation of the above information shall have any liability to any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or indirectly by the instructions contained within this or related message(s).
