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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSSUBARU2012IMPREZA WRX STI F4-2.5L DOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSAIR INJECTIONAIR INJECTION CONTROL VALVETESTING AND INSPECTION
2012 Subaru Impreza WRX STI F4-2.5L DOHC Turbo
Air Injection Control Valve: Testing and Inspection
2012 Subaru Impreza WRX STI F4-2.5L DOHC TurboSECTION Testing and Inspection
Secondary Air Combination Valve
INSPECTION
SECONDARY AIR COMBINATION VALVE LH
1. Check that the secondary air combination valve LH has no deformation, cracks or other damages.
2. Check the resistance between the terminals of secondary air combination valve LH.
3. Check that air does not come out from (B) when air is blown into (A).
4. Connect the battery positive terminal to the terminal No. 6 and the battery negative terminal to the terminal No. 4. Check that air is discharged from (B), when supplying air to (A).
SECONDARY AIR COMBINATION VALVE RH
1. Check that the secondary air combination valve RH has no deformation, cracks or other damages.
2. Check the resistance between the terminals of secondary air combination valve RH.
3. Check that air does not come out from (B) when air is blown into (A).
4. Connect the battery positive terminal to the terminal No. 2 and the battery negative terminal to the terminal No. 1. Check that air is discharged from (B), when supplying air to (A).
OTHER INSPECTIONS
1. Check that the secondary air pipe has no deformation, cracks or other damages.
2. Check that the air duct has no cracks, damage or loose part.
INSPECTION
SECONDARY AIR COMBINATION VALVE LH
1. Check that the secondary air combination valve LH has no deformation, cracks or other damages.
2. Check the resistance between the terminals of secondary air combination valve LH.
3. Check that air does not come out from (B) when air is blown into (A).
4. Connect the battery positive terminal to the terminal No. 6 and the battery negative terminal to the terminal No. 4. Check that air is discharged from (B), when supplying air to (A).
SECONDARY AIR COMBINATION VALVE RH
1. Check that the secondary air combination valve RH has no deformation, cracks or other damages.
2. Check the resistance between the terminals of secondary air combination valve RH.
3. Check that air does not come out from (B) when air is blown into (A).
4. Connect the battery positive terminal to the terminal No. 2 and the battery negative terminal to the terminal No. 1. Check that air is discharged from (B), when supplying air to (A).
OTHER INSPECTIONS
1. Check that the secondary air pipe has no deformation, cracks or other damages.
2. Check that the air duct has no cracks, damage or loose part.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.