Air Conditioning System (Diagnostics - Introduction): Overview Scion tC II рестайлинг

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1. IGNITION SWITCH EXPRESSIONS HINT: The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this Service Information. Expression Ignition Switch (position) Engine Switch (condition) Ignition Switch off Off Off Ignition Switch ON ON On (IG) Ignition Switch ACC ACC On (ACC) Engine Start START Start
2. IF ANY OF FOLLOWING CONDITIONS ARE MET, KEEP ENGINE IDLING (ENGINE SPEED AT LESS THAN 2000 RPM) WITH AIR CONDITIONING SWITCH ON FOR AT LEAST 2 MINUTES Refrigerant gas has been refilled or parts of the air conditioning system have been replaced. The engine has not been started for a long time. NOTE: If the engine speed is more than 2000 rpm, the cooler compressor assembly may be damaged.
3. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED AREA OR NEAR AN OPEN FLAME
4. ALWAYS WEAR EYE PROTECTION
5. BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN YOUR EYES OR ON YOUR SKIN If liquid refrigerant gets in your eyes or on your skin: Wash the area with lots of cold water. WARNING: Do not rub your eyes or skin. Apply clean petroleum jelly to the skin. Go immediately to a hospital or see a physician for professional treatment.
6. NEVER HEAT CONTAINER OR EXPOSE IT TO OPEN FLAME
7. BE CAREFUL NOT TO DROP CONTAINER OR APPLY PHYSICAL SHOCKS TO IT
8. DO NOT OPERATE COMPRESSOR WITH INSUFFICIENT REFRIGERANT IN REFRIGERANT SYSTEM If there is not enough refrigerant in the refrigerant system, oil lubrication will be insufficient and compressor burnout may occur. Necessary care should be taken to avoid this.
9. DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE WHILE COMPRESSOR IS OPERATING Open and close only the low pressure valve. Opening and closing the high pressure valve could cause the charging cylinder to rupture. TEXT IN ILLUSTRATION *a Incorrect *b Correct
10. BE CAREFUL NOT TO OVERCHARGE SYSTEM WITH REFRIGERANT If the refrigerant is overcharged, it causes problems such as insufficient cooling, poor fuel economy and engine overheating.
11. DO NOT OPERATE ENGINE AND COOLER COMPRESSOR ASSEMBLY WITHOUT REFRIGERANT NOTE: Doing so may damage the inside of the cooler compressor assembly.

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COMMUNICATION TABLE

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1. GENERAL The air conditioning system has the following controls: Control Outline Variable Capacity Compressor Control Turns the compressor on and off and controls the discharge capacity based on signals from various sensors. Self-diagnosis Checks the sensors in accordance with the operation of the air conditioner switches, and then the clock displays a DTC (Diagnosis Trouble Code) to indicate if there is a malfunction or not (sensor check function).
2. MODE POSITION AND DAMPER OPERATION Mode Position and Damper Operation Control Damper Operation Position Damper Position Operation Air Inlet Control Damper Fresh A Brings in fresh air. Recirculation B Recirculates internal air. Air Mix Control Damper Max cold to max hot C - D Varies the mixture ratio of cold air to hot air in order to regulate the temperature continuously from hot to cold. Mode Control Damper Face F, I Air blows out of the center register and side register. Bi-level F, H Air blows out of the center register, side register, front footwell register duct and rear footwell register duct*. Foot E, G Air blows out of the side register, front footwell register duct and rear footwell register duct*. In addition, air blows out slightly from the front defroster. Foot/Def E, H Air blows out of the front defroster, side register, front footwell register duct and rear footwell register duct*. Def E, I Air blows out of the front defroster and side register. *: For models with rear footwell register duct
3. AIR OUTLETS AND AIRFLOW VOLUME Air Outlets and Airflow Volume Indication Mode A B C D Center Side Front Footwell/Rear Footwell* Defroster Face - - Bi-level - Foot - Foot/Def - Def - - *: For models with rear footwell register duct HINT: The size of the circle o indicates the proportion of airflow volume.
4. HEATER CONTROL SUB-ASSEMBLY (NO. 1, NO. 2, NO. 3) A rotary switch type air conditioning control assembly is used. 5 air outlet modes are provided on the control panel. The switch can also be set to a position between each of these mode settings. TEXT IN ILLUSTRATION *1 No. 1 Heater Control Sub-assembly *2 No. 2 Heater Control Sub-assembly *3 No. 3 Heater Control Sub-assembly - - A control cable is used. This cable is circular, and is placed around the cable pulleys that are installed on the heater control sub-assembly and damper. TEXT IN ILLUSTRATION *1 Pulley *2 Base of Pulley *3 Control Cable - - *a Heater Control Sub-assembly Side *b Damper Side
5. AIR CONDITIONING RADIATOR ASSEMBLY The air conditioning unit consists of the No. 1 cooler evaporator sub-assembly, heater radiator unit sub-assembly, No. 1 cooler thermistor, recirculation damper servo sub-assembly and blower assembly. The No. 1 cooler evaporator sub-assembly and heater radiator unit sub-assembly are housed in the air conditioning unit. TEXT IN ILLUSTRATION *1 Heater Radiator Unit Sub-assembly *2 No. 1 Cooler Evaporator Sub-assembly *a Front - - A partial recirculation system is used. This system has an air inlet control door (sub) in the cabin side of the air inlet duct. Thus, it is able to cycle a small volume of recirculated air even in fresh mode, thereby enhancing heating performance. When the blower switch is set to position 1 or higher, the suction force of the blower fan opens this air inlet control door (sub). TEXT IN ILLUSTRATION *1 Air Inlet Control Door *2 Air Inlet Control Door (Sub) *a Fresh Air *b Recirculated Air
6. NO. 1 COOLER EVAPORATOR SUB-ASSEMBLY A Revolutionary super-slim Structure (RS) evaporator is used. By placing the tanks at the top and the bottom of the No. 1 cooler evaporator sub-assembly, and by using a micropore tube construction, the following effects have been achieved: Heat exchange efficiency is ensured. Temperature distribution is made uniform. The No. 1 cooler evaporator sub-assembly is made thinner. TEXT IN ILLUSTRATION *1 Tank *2 Tube *3 Cooling Fin
7. NO. 1 COOLER THERMISTOR The No. 1 cooler thermistor detects the temperature of the cool air immediately past the No. 1 cooler evaporator sub-assembly in the form of resistance changes, and outputs this temperature to the air conditioning amplifier assembly.
8. HEATER RADIATOR UNIT SUB-ASSEMBLY This heater radiator unit sub-assembly has been made more compact and performance has been improved by making the core section finer and improving the shapes of the tank section and flow section. Also, by using aluminum, the environmental burden due to disposal (of materials such as lead) has been reduced.
9. BLOWER ASSEMBLY Strong magnets and ball bearings are used to achieve a compact and lightweight assembly.
10. RECIRCULATION DAMPER SERVO MOTOR SUB-ASSEMBLY The pulse pattern type servo motor detects the relative position using 2-bit on/off signals. The forward and reverse revolutions of this motor are detected using 2 phases, A and B, which output 4 types of patterns. The air conditioning amplifier assembly counts the number of pulse patterns in order to determine the stopped position.
11. CONDENSER ASSEMBLY WITH RECEIVER A sub-cool condenser is used. This is a multi-flow condenser consisting of 3 integrated portions: a condensing portion, a supercooling portion and a gas-liquid separator (modulator). This condenser assembly with receiver uses a sub-cool cycle for its cooling cycle system to improve heat-exchange efficiency. In the sub-cool cycle, after the refrigerant passes through the condensing portion of the condenser assembly with receiver, both the liquid refrigerant and the gaseous refrigerant that could not be liquefied are cooled again in the supercooling portion. Thus, the refrigerant is sent to the No. 1 cooler evaporator sub-assembly in an almost completely liquefied state. TEXT IN ILLUSTRATION *1 Filter *2 Desiccant *3 Modulator - - *a Condensing Portion *b Supercooling Portion Gaseous Refrigerant Liquid Refrigerant HINT: Air bubbles in the refrigerant of the sub-cool cycle disappear before the system has been filled with the proper amount of refrigerant. Therefore, if the point at which the air bubbles disappear is used as the basis for determining when the system is recharged with the proper amount of refrigerant, the amount of refrigerant will be insufficient. As a result, the cooling performance of the system will be affected. If the system is overcharged with refrigerant, this will also lead to reduced performance. For the proper method of verifying the amount of the refrigerant and to recharge the system with refrigerant. Refer to «REPLACEMENT [05/2013 - ]»(ref-615270-S32727816542014050900000) .
12. COMPRESSOR ASSEMBLY WITH PULLEY The compressor assembly with pulley is a continuously variable capacity type compressor with a capacity that varies in accordance with the cooling load of the air conditioning. The compressor assembly with pulley consists of a pulley, shaft, lug plate, swash plate, piston, shoe, crank chamber, cylinder, solenoid valve, flow sensor, oil separator and variable suction side throttle. The oil separator consists of an oil separator chamber and an oil separator cylinder. TEXT IN ILLUSTRATION *1 Damper Limiter Type Air Conditioning Pulley *2 Shaft *3 Solenoid Valve *4 Variable Suction Side Throttle *5 Cylinder *6 Piston *7 Flow Sensor *8 Swash Plate *9 Shoe *10 Crank Chamber *11 Lug Plate *12 Oil Separator *13 Oil Separator Chamber *14 Oil Separator Cylinder A damper limiter type air conditioning pulley is used. A cylinder-type damper is used for the TSE17C compressor assembly. Torque fluctuations have been suppressed, making an inertia weight unnecessary. As a result, the weight of the compressor assembly has been reduced. TEXT IN ILLUSTRATION *1 Damper *2 Inertia Weight *a TSE17C Compressor Assembly *b Conventional Type Compressor Assembly