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.
2024 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
System Block Diagram
- MT model
(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 (7) Fuel injector (8) Engine coolant temperature sensor (9) Manifold absolute pressure and intake air temperature sensor (10) Mass air flow and intake air temperature sensor (11) Purge control solenoid valve (12) Knock sensor (13) PCV valve (14) Air cleaner (15) Canister (16) Main relay (17) Fuel pump relay (18) Fuel filter (19) Fuel pump (20) Front catalytic converter (21) Rear catalytic converter (22) Front oxygen (A/F) sensor (23) Rear oxygen sensor (24) Resonator chamber (25) Radiator fan relay (26) Radiator fan (27) Combination meter (28) Tumble generator valve actuator (29) Fuel level sensor (30) EGR control valve (31) Fuel pressure sensor (32) Intake oil control solenoid (33) Exhaust oil control solenoid (34) Engine oil temperature sensor (35) Intercooler (36) Accelerator pedal position sensor (37) Leak check valve ASSY (38) Drain filter (39) Electronic air by-pass valve (40) Ejector (41) Fuel pump control module (42) High-pressure fuel pump (43) Turbocharger (44) Electronic wastegate valve (45) Check valve (46) CPC pressure sensor (47) A/C relay (48) A/C control module (49) A/C compressor (50) ABS wheel speed sensor (51) VDC control module and hydraulic control unit (VDCCM & H/U) (52) Body integrated unit (53) Central gateway (54) Data link connector (55) Radiator fan control module (56) Neutral position switch - CVT model
| (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 |
| (7) | Fuel injector |
| (8) | Engine coolant temperature sensor |
| (9) | Manifold absolute pressure and intake air temperature sensor |
| (10) | Mass air flow and intake air temperature sensor |
| (11) | Purge control solenoid valve |
| (12) | Knock sensor |
| (13) | PCV valve |
| (14) | Air cleaner |
| (15) | Canister |
| (16) | Main relay |
| (17) | Fuel pump relay |
| (18) | Fuel filter |
| (19) | Fuel pump |
| (20) | Front catalytic converter |
| (21) | Rear catalytic converter |
| (22) | Front oxygen (A/F) sensor |
| (23) | Rear oxygen sensor |
| (24) | Resonator chamber |
| (25) | Radiator fan relay |
| (26) | Radiator fan |
| (27) | Inhibitor switch |
| (28) | Combination meter |
| (29) | Tumble generator valve actuator |
| (30) | Fuel level sensor |
| (31) | EGR control valve |
| (32) | Fuel pressure sensor |
| (33) | Intake oil control solenoid |
| (34) | Exhaust oil control solenoid |
| (35) | Engine oil temperature sensor |
| (36) | Intercooler |
| (37) | Accelerator pedal position sensor |
| (38) | Leak check valve ASSY |
| (39) | Drain filter |
| (40) | Electronic air by-pass valve |
| (41) | Ejector |
| (42) | Fuel pump control module |
| (43) | High-pressure fuel pump |
| (44) | Turbocharger |
| (45) | Electronic wastegate valve |
| (46) | Check valve |
| (47) | CPC pressure sensor |
| (48) | A/C relay |
| (49) | A/C control module |
| (50) | A/C compressor |
| (51) | Transmission control module (TCM) |
| (52) | ABS wheel speed sensor |
| (53) | VDC control module and hydraulic control unit (VDCCM & H/U) |
| (54) | Body integrated unit |
| (55) | Central gateway |
| (56) | Data link connector |
| (57) | Radiator fan control module |
| (1) | Engine control module (ECM) |
| (2) | Fuel pump control module |
| (3) | Fuel pump |
| (4) | Fuel tank |
| (5) | Intercooler |
| (6) | Engine coolant temperature sensor |
| (7) | Crankshaft position sensor |
| (8) | Tumble generator valve LH |
| (9) | Tumble generator valve actuator LH |
| (10) | Intake camshaft position sensor LH |
| (11) | High-pressure fuel pump |
| (12) | Exhaust camshaft position sensor LH |
| (13) | Fuel injector |
| (14) | Electronic throttle control |
| (15) | Rear oxygen sensor |
| (16) | Front oxygen (A/F) sensor |
| (17) | Turbocharger |
| (18) | Mass air flow and intake air temperature sensor |
| (19) | Exhaust camshaft position sensor RH |
| (20) | Intake camshaft position sensor RH |
| (21) | Tumble generator valve actuator RH |
| (22) | Tumble generator valve RH |
| (23) | Fuel pressure sensor |
| (24) | Manifold absolute pressure and intake air temperature sensor |
| (25) | Throttle position sensor |
| (26) | Starter |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.