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.
2015 Subaru WRX STI Launch EditionFACTORY OEM SERVICE PROCEDURE
System Operation Check Mode: Operation: Engine
NOTE:
For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".
| Item | SSM display | Execution condition | ||
|---|---|---|---|---|
| Actuator ON/OFF Operation | Activating the fuel pump ON/OFF | Fuel Pump | ON ←→ OFF | Ignition switch is ON (engine OFF) |
| Activating the purge control solenoid valve 1 ON/OFF | CPC Solenoid Valve | ON ←→ OFF | ||
| Activating the radiator fan relay ON/OFF | Radiator Fan Relay | ON ←→ OFF | ||
| Activating the A/C relay ON/OFF | A/C Relay | ON ←→ OFF | ||
| Activating the wastegate control solenoid valve ON/OFF | Turbocharger Wastegate Solenoid | 0.0% ←→ 99.6% | ||
| Activating the secondary air combination valve relay 1 ON/OFF | Secondary Air Combi Valve 1 | ON ←→ OFF | ||
| Activating the secondary air combination valve relay 2 ON/OFF | Secondary Air Combi Valve 2 | ON ←→ OFF | ||
| Activating the secondary air pump relay ON/OFF | Secondary Air Pump Relay | ON ←→ OFF | ||
| Activating the purge control solenoid valve 2 ON/OFF | CPC Solenoid 2 | ON ←→ OFF | ||
| Activating the ELCM switching valve | ELCM switching valve | ON ←→ OFF | ||
| Activating the ELCM vacuum pump | ELCM pump | ON ←→ OFF | ||
| Fuel Pump Control | Fuel pump OFF operation | OFF drive | OFF | At idling |
| Activating the fuel pump ON/OFF | ON/OFF Dr. | ON ←→ OFF | Ignition switch is ON (engine OFF) | |
| Fixed Idle Ignition Timing | Fixed Idle Ignition Timing | 16.0° | At idling | |
| Idle Speed Control | Idle Speed Control | 500 - 2000 rpm | At idling | |
| Injector Control | Stopping fuel injection (Cylinder selection) | Injection Stop Mode | Injector 1 Injector 2 Injector 3 Injector 4 |
At idling |
| Fuel injection amount control (All cylinders) | Injection Quantity Control | 0 - 20% | At idling | |
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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