hi,
I've been doing a few conversions from subi engines to vw's. I have only been doing ej22's but have just begun a conversion with a ej 20.
I don't have a wiring diagram for this, only need about 6 wires that I cant figure out from ecu plugs.
Does anyone have an ecu pinout to share, 2000 liberty EJ20 manual non turbo
numbers are

B134 35 pin Blue connector
> #6 pin Red with Blue trace
> #21 pin Red with White trace Rear 02 sensor?
> #20 pin Green and Red trace

B135 28 pin Orange connector
> #28 pin Purple Starter switch?
> #27 pin Purple with Blue trace A/C switch ?

B136 30 pin Green connector
> #21 pin Purple with yellow trace Ground ?

B134 #6 Idle Air Control Solenoid Valve - Signal 2 - 1-13v - waveform

B134 #21 Rear Oxygen Sensor Heater Signal - 0-1.0v

B134 #20 Idle Air Control Solenoid Valve - Signal 4 - 1-13v - waveform


B135 #28 Starter Switch

B235 #27 A/C switch (Input) +ve


B136 #21 Ground (control Systems)


This is from an EJ251 but I have interchanged looms between the two as they are the same, except manual/auto differences.

^^^^^awesome mate... thank you!!
I actually had that scribbled down from a 25 .... good to see I was on the right track.

....just got back to this project...
a few more im unsure of....

Orange plug #28 white with black trace

Blue plug #17 Blue with orange trace or maybe brown...cant tell
Blue plug #32 Orange with white trace


thanks in advance

B135 Orange #28 starter signal 8-14v cranking (INPUT)

B134 Blue #17 A/C control relay ON:0.5 or less OFF 10-13. this switches the A/C clutch on by EARTHING the relay. (OUTPUT)

B134 Blue #32 something to do with VDC vehicle dynamic control system. Have not seen this on a loom before personally.

Again this is EJ251, I have not addressed colours as Imprezas and Libertys are different but are basically wired the same.

awesome man...thank you muchly. I was struggling with these ones....