Wiring: 1999 EJ22 harness strip down
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Analysis by Sesh Kanurykanurys@gmail.com
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This is what you need from a 1999 EJ22 phase II Subaru Impreza Sport wiring harness to run the engine. I.E. the pin-out for a swap into my 1987 EA82 Subaru GL wagon, carbureted. See Wiring Diagrams section of 1999 Impreza FSM.
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Harness ConnectorFor cross-reference
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ECM Connector (FSM Wiring Diagrams p.18):read right to left, top to bottom, from wire side
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a: B134, 35 pinsPinWire Color (solid/stripe)FunctionTerminates at (EJ connector/pin)Action
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a1Light Green/BlackFuel Tank Pressure SolenoidTerminate
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a2White/BluePurge Control SolenoidB22/2
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a3Red/Blueto MAIN Radiator Fan RelayConnect to Radiator fan relay1 w/ 20A fuse for fanRelay coil-side hot from Main Relay, ECU grounds to switch it
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a4BrownFuel Injector #1 SignalB22/9
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a5BlackIdle Air Control Solenoid ValveB21/1
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a6WhiteN/CB21/2Terminate
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a7Black/GreenEngine GroundB22/13
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a8Black/WhiteEngine GroundB22/15
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a9Yellow/GreenN/CB22/7Terminate
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a10Brown/YellowFuel Drain ValveTerminate
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a11Red/WhiteCheck Engine LightConnect to Warning Light from Main Relay
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a12Green/Redto SUB Radiator Fan RelayConnect to Radiator fan relay2 w/ 20A fuse for fanRelay coil-side hot from Main Relay, ECU grounds to switch it
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a13Light GreenFuel Injector #2 SignalB22/10
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a14Blue/RedFuel Injector #3 SignalB22/11
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a15Blue/BlackFuel Injector #4 SignalB22/12
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a16Light Green/BlackFuel Pump RelayB46/3 (fuel pump relay connector)Other side of coil to IGNITION RUN
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a17
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a18
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a19RedN/CB21/3Terminate
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a20GreenN/CB21/4Terminate
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a21
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a22
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a23
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a24
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a25Yellow/BlueIgnition Coil and Ignitor Assy
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a26Green/WhiteIgnition Coil and Ignitor Assy
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a27BlackIgnition Coil and Ignitor AssyB22/14
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a28
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a29
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a30Blue/GreenTachometer Signal from ECMConnect to tach on back of 1987 Cluster (Yellow on black round connector)confirmed, works great
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a31
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a32
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a33
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a34Black/YellowEngine GroundB22/8
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a35Black/YellowEngine GroundB22/8
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b: B135, 28 pinsPinWire Color (solid/stripe)FunctionTerminates at (EJ connector/pin)Action
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b1WhiteCrank Position SesnsorB21/17
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b2RedCamshaft Position SensorB21/18
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b3Grey/BlackOBDII PORT
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b4
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b5
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b6
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b7Green/RedV+ with Start and key ONB47/3Connect to IGNITION SWITCH RUN
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b8BlackCrank Position SesnsorB21/19
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b9GreenCamshaft Position SensorB21/20
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b10SBOuter Shield
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b11Green/WhiteOBDII PORTB40/4
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b12Light Green/RedOBDII PORTB40/5
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b13
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b14
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b15
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b16
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b17
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b18
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b19
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b20
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b21White/RedOBDII PortB40/8
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b22
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b23
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b24Green/YellowVehicle Speed SignalB17/1 (VSS)VSS from back of 1987 Gauge Cluster (Yellow/Red)See notes below, line 123
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b25
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b26Green/BlackNeutral Position Switch to engine GroundConnect to Engine Ground
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b27
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b28White/RedStarter Signal to ECMStarter Interlock RelayConnect to Starter Button in parallel to starter solenoid
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c: B136, 30 pinsPinWire Color (solid/stripe)FunctionTerminates at (EJ connector/pin)Action
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c1Yellow/BlueV+ with key ONB47/3 Main RelayConnect to Main Relay
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c2Yellow/BlueV+ with key ONB47/3 Main RelayConnect to Main Relay
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c3
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c4BlackKnock SensorB21/16
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c5Pink/BlueMass Air Flow SensorB21/15
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c6
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c7
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c8
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c9Black/RedV+ Always ONB61/2 Goes to MB-3, main fuse off of battery, 30A FuseConnect to Fuse block from battery
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c10
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c11
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c12Green/OrangeFuel Tank Pressure SensorTerminate
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c13BrownIntake Air Temperature SensorB21/14
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c14Black/YellowEngine Coolant Temperature SensorB21/13
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c15
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c16Red/GreenSensor Ground for engine/exhaust sensors
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c17Light GreenPower to Sensors!B21/12 (Red)
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c18
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c19
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c20
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c21BrownEngine GroundB22/16
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c22BrownEngine GroundB22/16
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c23
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c24
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c25Black/OrangeOuter Shield
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c26Blue/BlackFuel Temp SensorTerminate
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