This is Leon's(Subarute) wiring legend for his MY-Auto EJ22 conversion. It includes extra stuff for his auto trans wiring. We used a 97 PCM type(ecu and tcu in one unit) control unit and wiring. An immobiliser equipped wiring harness will include a couple of extras like immobiliser status light and door switch, otherwise it is the same up until "I" on the list.
There is obviously some light hearted ribbing included in the notes at the bottom that would not be included normally unless I know you enough to give you a ribbing.
Leon’s Super Special Wiring Explanation For Subaru EJ Engine
A – Battery Power Supply – Connect to Battery Positive via 30A Circuit Breaker
B – Ignition Switch Power – Connect to ignition switch via 15A Fuse
C – Starter – Connect to original MY starter solenoid wire.
D – Vehicle Speed Sensor – Square wave signal switching to ground. Use VDO 412 009 sensor.
E – Radiator Fan – Power to engine fans from ecu controlled relay.
F – Engine Speed Output – For Tachometer. Will probably require tacho booster to work with original MY dash
G – Air Conditioning switch. – 12v signal from A/C switch to request AC operation.
G1 – Air conditioner relay control – Ecu grounds this wire when AC operation is available. Connect to AC relay coil. If you wish to have AC controlled by the ecu I will draw you a schematic for it. You can just use the Compressor clutch wire to signal the ecu to idle up without actually controlling it.
H – Check Engine Light – Earth Switch for dash mounted 12V warning light.
I – Fuel Pump Positive – To fuel pump positive terminal from ecu controlled relay.
J – Hold switch – Switch this pin to ground when hold function required.
K – Brake switch – Connect to brake light side of brake switch.
L – Kickdown Switch – Switches to ground near full throttle. Mount momentary switch on throttle pedal.
M – Power Switch – connect to original plug on Liberty gearshifter.
N – FWD switch – reverts to fwd when this wire is grounded.
P – AWD Solenoid wire – This is the wire that you will need to fiddle with to lock the awd clutches when doing silly things up the beach or in mud holes. Ask Dane how to wire it up if you want to do it.
All connections should be soldered and insulated. ECU should be mounted in a dry secure position. All wiring should be insulated and secured after the engine has been started and is operating correctly.
The Brown 6 Pin relay is the ignition relay.
The tin top relay with the green connector is the fuel pump relay.
The white and black pairs of connectors are for self diagnosis. They should not be connected except when in diagnosis mode.(See workshop manual).
The Yellow connector is for the Subaru Select Monitor Scan tool(or other aftermarket scan tools).
The bosch type relay with the fuse block next to it is for the thermo fan power. USE THIS. DO NOT USE THE ORIGINAL CRAP MY WIRING.
Any questions should be referred to Al. Don’t hesitate to call if you have issues. I will only ridicule you for asking silly questions behind your back to be sure to not hurt your feelings.
[email protected].
P.S. Tell all your friends!
Cheer. Al.