kpjo4

By any chance does anyone have the obd1 pinouts for the 3 shock tower ecu harness plugs on the passenger side? I've been searching for awhile and only seem to stumble on the ecu pinouts.

TinyD2point0

im having the same problem. but i need the engine harness side. what ecu are you running...

dr.rez1989

my ecu was stolen out of my car along with the plugs so a bunch of loose wires where the ecu used to be. i used a multimeter to perform a continuity test for each wire that led to the engine bay, this is what i came up with using a ecu harness i took out of a automatic civic(eg) ex:

Plug 1=14 pin (from left to right)
top row: A16=alternator control(white/yellow) A6-=primary o2 sensor heater control(orange/black) A4=vtec solenoid(orange/white)

2nd row: D21=sensor ground 1(green/blue) D17=MAP sensor(pink/white) D19=sensor voltage for MAP D6=vtec pressure switch(orange/blue)

3rd row: D11=throttle position sensor(pink/black) D22=sensor ground 2(green/white) D20=sensor voltage for TPS(yellow/white) A21=ignition control module(red/green)

bottom row: D15=intake air temp(red/yellow) D13=engine coolant temp sensor(red/white) D9=alternator FR charge signal(pink)


Plug 2-10pin
top row: B2=logic ground 2(brown/black) D14=primary heated o2(white) A26=logic ground 1(black/red)

middle row: B11=CYP sensor p-side(orange) B12=CYP ground m-side(white) B13=TDC ground p-side(orange/blue) B14=TDC ground m-side(white/blue)

bottom row: B15=CKP P ground(blue/greemn) B16=CKP M ground(blue/yellow) empty


Plug 3-4pin
Top: A3=injector 2(red) A1=injector 1(brown)
bottom: A2=injector 4(yellow) A5=injector 3(light blue)


sorry for the shitty pics

dr.rez1989

i used this write up as a reference, although not all the colors matched

http://technet.ff-squad.com/wiring.obd1.htm

Mark Hopper

I know this is an old post, I'm wireing in a obd1 z6 in to an obd2a car, which pin and plug on the engine harness is the right one for the iacv, don't see it listed on here?

Cheers