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.
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HOMESERVICE MANUALSSUBARU2010IMPREZA 2.5I, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSHVAC SYSTEM (HEATER, VENTILATOR AND A/C) - MECHANISM & FUNCTIONMANUAL AIR CONDITIONINGGENERALSPECIFICATIONS
2010 Subaru Impreza 2.5i, 4D Sedan, Automatic
Manual Air Conditioning: General: Specifications
2010 Subaru Impreza 2.5i, 4D Sedan, AutomaticSECTION Specifications
| Item | Specifications | Remarks | ||
|---|---|---|---|---|
| Air conditioning | "Full-air-mix" type | |||
| Cooling performance | Cooling capacity (W) | 5300 | ||
| Air flow rate (m3 /h) | 460 | |||
| Refrigerant quantity | HFC-134a (g) | 400±30 | ||
| Compressor | Type | Scroll | Denso SCSA08C | |
| Capacity (cm3 /rev) | 74.5 | |||
| Maximum permissible speed (rpm) | 9000 | |||
| Lubricant (amount contained in compressor in g) | Denso oil 8 (70) | |||
| Magnetic clutch | Type | Dry, single disc | ||
| Power consumption (W) | 35 | |||
| Pulley ratio | 1:1.43 (crankshaft pulley diameter: 133 mm; compressor pulley diameter: 125 mm) | |||
| Belt | Polyurethane V-belt with four ribs | |||
| Condenser | Type | Multi-flow type (with built-in liquid tank for subcooling) | ||
| Fan | Type | Electric-motor-driven axial flow fan | ||
| Fan diameter | 300 mm (7+5 blades) | |||
| Power consumption (W) | 90 x 2 | |||
| Evaporator | Type | Laminated | ||
| Expansion valve | External pressure equalizing type | |||
| Temperature control | Thermo AMP (amplifier) | |||
| Other controls | Fast idle control system | Engine control module (ECM) | ||
| High and low pressure limit control | Low pressure switch: Turns off compressor at a pressure lower than 0.196 MPa High-pressure switch: Turns off compressor at a pressure higher than 3.140 MPa | |||
| High-speed limit control | Performed by ECM | |||
| Radiator and condenser fan control | Performed by ECM | |||
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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.