MembersPage/SteinOvePrestmo/WiringPage (2006-03-16 04:43:08)

Information on my wiring setup


Tachometer (RPM Rev Counter)

Original setup

Originally the rpm signal is feed from the coil (-) (Single coil distributor) to the fuse box where the signal is distributed to the fuel pump relay, multi function instrument (shift light for economic driving, fuel consumption calculations) and tachometer.

New setup:

I'm now using 4 COPS and need a new tachometer signal and rpm signal to the fuel pump relay.

A possible solution is to wire signal from each coil with separation diodes into the cars original wiring

Using 4 high-voltage diodes (such as ES2J or BY399 or even 1n4007) to make a tach signal compatible with the original sounds good.

A similar solution is described at the bottom of this page http://www.megasquirt.info/ms2/EDIS.htm

Questions from others:

Why don't you control the shift light and fuel pump relay directly from the ECM ? To keep it simple I prefer to use a well known solution at the moment (and it's simple to wire in one cable)


Pin-out

work in progress

FunctionWire ColorVEMS ECU pinCar & Unit pinComments
Vbatt? EC36-25Only power when ignition_on
Ground? EC36-26Connect as close as possible to the chassis ground / engine
Power Ground?EC36-21 EC36-32 EC36-5Connect together in the wiring and ground to chassis or engine
Trigger? EC36-27OEM 60-2 wheel on crank with sensor 90 deg before TDC
TPSws/geEC36-1Pin 5 TB
Coolant temperature?EC36-14
Manifold air tempsw/roEC36-2Pin 1 AIC
Fuel pump relay? EC36-17(29) on Relay-
Injector 1?EC36-7Pin 2 JetINJFET_1
Injector 2?EC36-19Pin 2 JetINJFET_2
Injector 3?EC36-8Pin 2 JetINJFET_3
Injector 4?EC36-20Pin 2 JetINJFET_4
Idle controller???Will use one of the Injector channels
Ignition 1?EC36-33Pin 1 Coil Cyl 1Pin 15 (+) fused 20A Pin 4a (-)
Ignition 2?EC36-34Pin 1 Coil Cyl 2Pin 15 (+) fused 20A Pin 4a (-)
Ignition 3?EC36-35Pin 1 Coil Cyl 3Pin 15 (+) fused 20A Pin 4a (-)
Ignition 4?EC36-36Pin 1 Coil Cyl 4Pin 15 (+) fused 20A Pin 4a (-)
DDFlyBack ?EC36-23Wired internally grounded as close as possible to the chassis ground / engine
WBO2 heater-?EC18-18Pin ? WBO2
WBO2 nernst?EC18-13Pin ? WBO2
WBO2 pump-?EC18-7 Pin ? WBO2
WBO2 pump+?EC18-9 Pin ? WBO2

You may find:

http://www.vems.hu/wiki/index.php?page=MembersPage%2FPhatBob%2FUserGuide

Helpful


More info will come shortly