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.
2023 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE
Engine Wiring Harness
- Structural diagram 1
(1) Throttle position sensor connector (2) Multi-wire connector (3) Guide it over the top of fuel delivery pipe. (4) Manifold absolute pressure sensor connector (5) Purge control solenoid valve connector (6) Secure the clip to the fuel pipe. (7) PCV hose (8) Guide it over the top of PCV hose. (9) Clip (10) The gap after inserting to the end is allowed, but dislocation from the intake manifold is not allowed. (11) M/B connector (12) ECM connector (For installation and removal, refer to "Engine Control Module (ECM)". Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>ENGINE CONTROL MODULE (ECM) .) (13) Push in the lock lever securely. (14) Secure the harness to the clip. (15) Secure the harness case to the harness stay. - Structural diagram 2
Courtesy of SUBARU OF AMERICA, INC.
(1) Thermo control valve ASSY connector (2) Transmission harness connector (30P) (3) Fuel injector connector (#4) coupling harness connector (4) Knock sensor LH side coupling harness connector (5) Secure the clip to the screw hole. (6) High-pressure fuel pump connector (7) Fuel injector connector (#2) (8) Crankshaft position sensor connector (9) Fuel injector connector (#1) (10) Fuel pressure sensor connector (11) Fuel injector connector (#3) (12) Knock sensor RH side coupling harness connector (13) Secure the knock sensor RH side coupling harness to the clip. (14) Engine wiring harness stay (15) Secure the clip to the harness case. (16) Secure the clip to the engine wiring harness stay. (17) Engine ground (fastened together with harness case) Tightening torque: N.m (kgf-m, ft-lb)
T1: 6.4 (0.7, 4.7)
T2: 19 (1.9, 14.0)
- Structural diagram 3
(1) Outlet engine coolant temperature sensor connector (2) EGR control valve connector (3) Oil pressure switch (4) Engine oil temperature sensor connector (5) Intake oil control solenoid connector LH (6) Secure the clip to the screw hole. (7) Exhaust oil control solenoid connector LH (8) Inlet engine coolant temperature sensor connector (9) Oil level switch connector (10) Exhaust oil control solenoid connector RH (11) Intake oil control solenoid connector RH (12) Tumble generator valve actuator connector LH (13) Ignition coil connector (#4) (14) Ignition coil connector (#2) (15) Exhaust camshaft position sensor connector LH (16) Intake camshaft position sensor connector LH (17) Intake camshaft position sensor connector RH (18) Exhaust camshaft position sensor connector RH (19) Ignition coil connector (#1) (20) Ignition coil connector (#3) (21) Tumble generator valve actuator connector RH (22) Secure a clip to the intake manifold assembly.
Factory Service Tools
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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.