Subaru IMPREZA 2004 Service Manual page 41

FUEL INJECTION (FUEL SYSTEMS)
1. General Description ....................................................................................2
2. Throttle Body.............................................................................................15
3. Intake Manifold..........................................................................................16
4. Engine Coolant Temperature Sensor........................................................27
5. Crankshaft Position Sensor.......................................................................28
6. Camshaft Position Sensor.........................................................................29
7. Knock Sensor............................................................................................30
8. Throttle Position Sensor............................................................................31
9. Manifold Absolute Pressure Sensor..........................................................33
10. Intake Air Temperature Sensor .................................................................34
11. Idle Air Control Solenoid Valve .................................................................35
12. EGR Valve ................................................................................................36
13. Air Assist Injector Solenoid Valve .............................................................37
14. Fuel Injector ..............................................................................................38
15. Front Oxygen (A/F) Sensor .......................................................................43
16. Rear Oxygen Sensor.................................................................................45
17. Engine Control Module (ECM) ..................................................................47
18. Main Relay ................................................................................................48
19. Fuel Pump Relay.......................................................................................49
20. Fuel ...........................................................................................................50
21. Fuel Tank ..................................................................................................51
22. Fuel Filler Pipe ..........................................................................................53
23. Fuel Pump.................................................................................................57
24. Fuel Level Sensor .....................................................................................59
25. Fuel Filter ..................................................................................................60
26. Fuel Cut Valve...........................................................................................61
27. Fuel Damper Valve ...................................................................................62
28. Fuel Delivery, Return and Evaporation Lines............................................63
29. Fuel System Trouble in General ...............................................................66
FU(H4SO)
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