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Home >> Subaru >> 2025 >> Forester Wilderness >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostics) - Introduction -- (Forester Wilderness) >> General Description >> System Block Diagram
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System Block Diagram

G16344830Courtesy of SUBARU OF AMERICA, INC.
(1) Engine control module (ECM)
(2) Ignition coil
(3) Crankshaft position sensor
(4) Intake camshaft position sensor
(5) Exhaust camshaft position sensor
(6) Electronic throttle control sensor
(7) Fuel injector
(8) Engine coolant temperature sensor (outlet)
(9) Engine coolant temperature sensor (inlet)
(10) Thermo control valve ASSY
(11) Manifold absolute pressure sensor
(12) Mass air flow and intake air temperature sensor
(13) Purge control solenoid valve
(14) Knock sensor
(15) PCV valve
(16) Air cleaner
(17) Canister
(18) Main relay
(19) Fuel pump relay
(20) Fuel filter
(21) Fuel pump
(22) Front catalytic converter
(23) Rear catalytic converter
(24) Front oxygen (A/F) sensor
(25) Rear oxygen sensor
(26) Radiator fan relay
(27) Radiator fan
(28) Combination meter
(29) Air filter
(30) Fuel level sensor
(31) Resonator chamber
(32) EGR control valve
(33) Intake oil control solenoid valve
(34) Exhaust oil control solenoid valve
(35) Engine oil temperature sensor
(36) Leak check valve ASSY
(37) Tumble generator valve actuator
(38) Parking/neutral position switch
(39) Accelerator pedal position sensor
(40) EGR cooler
(41) High-pressure fuel pump
(42) High-pressure fuel pressure sensor
(43) Transmission control module (TCM)
(44) VDC control module and hydraulic control unit (VDCCM & H/U)
(45) ABS wheel speed sensor
(46) Data link connector
(47) To IG 1 relay
(48) A/C compressor
(49) A/C relay
(50) A/C control panel