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Vw passat b4 2.0L 8v 5 speed manual ... HIH Mazda millennium Supercharger 30psi or 2.10 bar ...

Not rusEfi yet, just first start ever
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1995 Vw ABA engine ECU OBD1 wiring harness diagram

1995 Vw ABA engine ECU OBD1
68/1 = Brouw & Red - Ground 
68/2 = Injector out put 
68/5 = Yellow & black - Check engine light 
68/6 = yellow & blue -fuel pump relay (switch on) 
68/7 = Brouwn & red - ground 
68/8 = Black & Red - coil power side 
68/9 = Black & brown - ECU relay sig (whitch on) 
68/10 = Brown - Ground 
68/14 = Blue - Coolant temp 
68/15 = Lilac - EGR temp (cal only) 
68/16 = Brown & red - MAF 
68/17 = Red - MAF 
68/20 = white - o2 signal/ground 
68/21 = Yellow - OBD check port 
68/22 = Green & black - Power 
68/23 = Red & blue- Power in from ECU relay 
68/24 = Injector out put 
68/25 = injector out put 
68/26 = injector out put 
68/27 = White - IAC 
68/28 = white - o2 control unit/relay 
68/30 = Green & gray - EGR valve 
68/31 = Green & yellow - evap valve 
68/33 = Brown - Ground 
68/36 = Blue & green - intake air temp 
68/37 = Green - AC 
68/38 = Black - coil signal side (tack side) 
68/39 = Blue - AC 
68/40 =Green & white -TPS 
68/41 = Black & yellow - TPS 
68/42 = Yellow - o2 signal/ground 
68/43 = Grey & white = OBD check port 
68/44 = White & red - from distributor 
68/51 = Lilac & White - ??? 
68/53 = Black & white - IAC 
68/54 = Red & yellow - from distributor 
68/55 = Brown & white - Ground 
68/56 = Brown & white - Ground 
68/58 = White - Ground 
68/65 = Blue & white- vehical speed signal form dash 
68/67 = Red - crank sensor 
68/68 = Green - Crank sensor

In any case, double check where Wire are going ...

just checking various ecu connectors and the pinouts: is there any guideline on wiring all those pins, like grouping high-current pins (injectors), grounds, signal pins, etc.

1992-1997 Passat, 1993-1999 Golf, GTI, Jetta
VR6 & ABA Motronic- OBD1 & OBD2

Motronic engine computer for the VR6 (AAA code) and 4 cylinder 2.0 (ABA code) engines. Wiring is substantially similar between all 4 engines, with differences noted below.

Bosch manufactures this system. The OBD1 system is called Motronic M2.9 (M2.9.1 for engines with coil pack), and OBD2 is called Motronic M5.9.

I wonder if there is any risk in drilling the board in terms of GND layer touching VCC layer on the sharp edges of the hole?

I wonder if these wires would be enough. These are eBay jumper wires of unknown gauges, right? At least ground wires should be probably thicker.

22-24 AWG

5A to 8.73A is a thermal limit, and an absolute minimum. As well that's a very high estimate. UL486E puts that around 2 to 3 amps. I see the voltage drop would be about .25V for this short length of wire. As fuel injectors and such turn on and off, it will cause your GND signals to vary which will cause your analog signals to vary as injectors turn on and off.

UL486E snippet found here http://www.wecoconnectors.com/data_source/fichiers/wire_size_specifications.pdf

AWG voltage drop calculator found here http://www.powerstream.com/Wire_Size.htm

Can I use this connection scheme ???
where to connect the ignition coil ???

fule pump relay ???

Abricos wrote:fule pump relay ???

http://rusefi.com/wiki/index.php?title=Manual:Hardware_Frankenso_board#Default_Pinout

???

ignition is HL1 or what ever HL you need. This does not drive the coil directly, you need an ignitor. The HL is for high or low driver. The high side can be configured for 12V or 5V. Your OEM VW coil probably has the ignitor integrated into the coil, but it might not.

Yes ignitor integrated into the coil ...

Is the signal 5V or 12V? You will have to configure the HL driver to driver to the proper high level. There is a jumper that needs to be installed.

I have 12 v signal ...
60-2 VR. Sensor ...

I need to add a note to this wiki. See P602 and P604. Install jumper across P604 to make this a 12V high side drive.

http://rusefi.com/wiki/index.php?title=Manual:Hardware_Frankenso_board#Hi_side

First progressive ...

I changed the VR sensor ...
as the old do not always show a signal ...
It may be the age of the sensor ...

Running on rusEfi

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That's super...

Sorry for the very bad pun.