| Component Location Index |

| 1. Expansion valve 2. Service port (Low pressure) 3. Service port (High pressure) 4. Discharge hose | 5. Suction & Liquid tube assembly 6. Electric A/C compressor 7. Condenser |

| 1. Auto defogging sensor 2. Photo sensor | 3. Heater & A/C control unit 4. Heater & Blower unit |
Refrigerant System Service BasicsRefrigerant Identification• Do not mix HFO-1234yf (R-1234yf) in the vehicle with other refrigerant, such as R-12, R-134a and etc.
Oil Specification1.The HFC-134a system requires synthetic (POE) compressor oil whereas the R-12 system requires mineral compressor oil. The two oils must never be mixed.
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DescriptionThe auto defogging sensor is installed on front window glass. The sensor judges and sends signal if moisture occurs to blow out wind for defogging. The air conditioner control module receives a signal from the sensor and restrains moisture and eliminates defog by the intake actuator, A/C, auto defogging actuator, blower motor rpm and mod