Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUBARU2007OUTBACK LIMITED, 4D WAGON, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCEREMOVE, OVERHAUL & INSTALLMECHANISM & FUNCTION -- FUEL INJECTION SYSTEM (H4SO)CONTROL SYSTEMINPUT AND OUTPUT SIGNALS
2007 Subaru Outback Limited, 4D Wagon, Automatic
Input And Output Signals
2007 Subaru Outback Limited, 4D Wagon, AutomaticSECTION Input And Output Signals
INPUT AND OUTPUT SIGNALS CHART
| Signal | Unit | Function |
|---|---|---|
| Input signals | Manifold absolute pressure sensor | Detects the pressure of intake air (measures the absolute pressure). |
| Mass air flow and intake air temperature sensor | Detects the temperature and amount of intake air. | |
| Throttle position sensor | Detects the throttle valve position. | |
| Front oxygen (A/F) sensor | Detects the density of oxygen in exhaust gases at the upstream of the front catalytic converter. | |
| Front oxygen sensor Rear oxygen sensor | Detects the density of oxygen in exhaust gases at the downstream of the front catalytic converter. | |
| Crankshaft position sensor | Detects the crankshaft angular position. | |
| Camshaft position sensor | Detects the combustion cylinder. | |
| Engine coolant temperature sensor | Detects the engine coolant temperature. | |
| Knock sensor | Detects engine knocking. | |
| Accelerator pedal position sensor | Indicates the accelerator pedal position. | |
| Ignition switch | Detects operation of the ignition switch. | |
| Starter switch | Detects the condition of engine cranking. | |
| Neutral position switch (MT) | Detects that the gear is in neutral. | |
| Inhibitor switch (AT) | Detects shift positions. | |
| A/C switch | Detects ON-OFF operation of the A/C switch. | |
| Fuel temperature sensor | Detects the temperature of the fuel in the fuel tank. | |
| Fuel level sensor | Detects the level of the fuel in the fuel tank. | |
| Fuel tank pressure sensor | Detects the evaporation gas pressure in the fuel tank. | |
| A/C mid pressure switch | Detects operation of the A/C mid pressure switch. | |
| Wiper switch | Detects ON-OFF operation of the wiper switch. | |
| Power steering switch | Detects operation of the power steering switch. | |
| Small light switch | Detects ON-OFF operation of the small light switch. | |
| Blower fan switch | Detects ON-OFF operation of the blower fan switch. | |
| Rear defogger switch | Detects ON-OFF operation of the rear defogger switch. | |
| Output signals | Fuel injector | Activates an injector. |
| Ignition signal | Turns the primary current to the ignition coil ON or OFF. | |
| Electronic control throttle | Controls motor output for the electronic control throttle. | |
| Fuel pump relay | Turns ON or OFF the fuel pump relay. | |
| A/C control relay | Turns ON or OFF the A/C control relay. | |
| Radiator fan control relay | Turns ON or OFF the radiator fan control relay. | |
| Tumble generator valve actuator | Operates the tumble generator valve. | |
| Engine warning light | Indicates existence of abnormality. | |
| Purge control solenoid valve | Controls purge of evaporative gas absorbed by the canister. | |
| EGR valve | Adjusts the exhaust gas circulating flow to the intake pipe. | |
| Heater circuit of front and rear oxygen sensors | Controls heater of front and rear oxygen sensors. | |
| Pressure control solenoid valve | Controls evaporation pressure in the fuel tank. | |
| Drain valve | Closes the evaporation line between the fuel tank and canister to detect leakage of evaporation gas. | |
| Power supply | Controls ON/OFF of the main power supply relay. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.