Air Conditioning System (Automatic) (Diagnostics - Introduction): Overview Toyota Highlander II рестайлинг

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1. PRECAUTION FOR DISCONNECTING THE BATTERY CABLE HINT: When disconnecting the battery negative (-) terminal, initialize the following systems after the terminal is reconnected: System Name See Procedure Power Back Door System Refer to «INITIALIZATION»(ref-422289-S16028026952011092600000)
2. 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 LOCK Off Ignition Switch on (IG) ON On (IG) Ignition Switch on (ACC) ACC On (ACC) Engine Start START Start
3. PRECAUTIONS WHEN USING TECHSTREAM When using Techstream to troubleshoot the LIN communication line: Connect Techstream to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the tester and vehicle begins. After all DTCs are cleared, check if the trouble occurs again 6 seconds after the ignition switch is turned on (IG).
4. IF ANY OF FOLLOWING CONDITIONS ARE MET, KEEP ENGINE IDLING WITH A/C ON (ENGINE SPEED AT LESS THAN 2000 RPM) FOR AT LEAST 1 MINUTE: Refrigerant gas has been refilled or A/C parts have been replaced. A long time has elapsed since the engine was stopped. NOTE: If the engine speed exceeds 2000 RPM, the A/C compressor may be damaged.
5. DO NOT HANDLE REFRIGERANT IN ENCLOSED AREAS OR NEAR OPEN FLAMES
6. ALWAYS WEAR EYE PROTECTION
7. 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 physician or hospital for professional treatment.
8. NEVER HEAT CONTAINER OR EXPOSE IT TO OPEN FLAME
9. BE CAREFUL NOT TO DROP CONTAINER OR SUBJECT IT TO PHYSICAL SHOCKS
10. DO NOT OPERATE COMPRESSOR WITH INSUFFICIENT REFRIGERANT IN REFRIGERANT SYSTEM If there is not enough refrigerant in the refrigerant system, oil circulation n will be insufficient and compressor burnout may occur. Necessary care should be taken to avoid this.
11. 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.
12. 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.
13. DO NOT OPERATE ENGINE AND COMPRESSOR WITHOUT REFRIGERANT NOTE: This may damage the inside of the compressor.

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COMMUNICATION TABLE

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1. GENERAL The air conditioning system has the following features: An automatic, dual-control air conditioner system comprising front/rear independent temperature control is used. In accordance with the temperature set using the temperature control switch, the air conditioning amplifier determines the outlet temperature based on the input signals from various sensors. In addition, corrections are made in accordance with the signals from the water temperature sensor to control the outlet air temperature. Controls the blower motor in accordance with the airflow volume determined by the air conditioning amplifier based on the input signals from various sensors. Automatically changes the outlets in accordance with the outlet mode ratio that is determined by the air conditioning amplifier based on the input signals from various sensors. Based on the signals from the ambient temperature sensor, this system calculates the outside temperature and indicates it in the multi-information display. The left/right independent temperature control and neural network control make air conditioner control available to suit the persons in the driver seat and in the passenger seat. The Positive Temperature Coefficient (PTC) heater system contains a PTC heater that heats the air that has passed through the heater core to ensure the proper heater performance. Turns the rear defogger and outside rear mirror heaters on for 15 minutes when the rear defogger switch is pressed. Turns them off if the switch is pressed while they are operating. Checks the sensors in accordance with the operation of the air conditioner switches. The air conditioning amplifier has the function of controlling the indicator lighting. When a high load is applied to the EPS system, the EPS ECU will send a signal to the air conditioning amplifier. After receiving the signal, the air conditioning amplifier may turn off the rear defogger, front deicer, and seat heaters.
2. MODE POSITION AND DAMPER OPERATION Control Damper Control Position Damper Position Operation Air Inlet Control Damper FRESH A Brings in fresh air RECIRC B Recirculates internal air Air Mix Control Damper (Left/Right Independent Control) Driver and Front Passenger Side MAX COOL to MAX HOT (TEMP. SETTING 18 to 32°C (65 to 85°F) C, D, E Varies mixture ratio of fresh air and recirculation air in order to regulate temperature continuously from HOT to COOL Mode Control Film Damper Driver and Front Passenger Side FACE I, J, L, O, U Air blows out of center registers and side registers. BI-LEVEL I, M, Q, R, T Air mainly blows out of center registers, side registers, and footwell register ducts. FOOT H, K, N, P, S Air mainly blows out of front and rear footwell register ducts. In addition, air blows out slightly from front and side defrosters, and side registers. FOOT/DEF G, K, N, P, S Air mainly blows out of front and side defrosters to defrost windshield. Air also blows out from front and rear footwell register ducts, and side registers. DEF F, K, N, U, V Air blows out of front and side defrosters and side registers to defrost windshield. Control Damper Control Position Damper Position Operation Air Mix Control Damper MAX COOL to MAX HOT TEMP. SETTING 18 to 32°C (65 to 90°F) D, E Varies mixture ratio of fresh air and recirculating air in order to regulate temperature continuously from HOT to COOL Mode Control Film Damper FACE A Air blows out of roof face ducts. BI-LEVEL B Air blows out of roof face ducts and rear foot ducts. FOOT C Air blows out of rear foot ducts.
3. AIR OUTLET AND AIRFLOW VOLUME Air Outlet Mode Air Outlet Position Symbol A B C D E Center Face Side Face Foot Footwell Defroster FACE X X X BI-LEVEL X FOOT X FOOT/DEF X DEF X X X HINT: The size of the circle o indicates the proportion of airflow volume. Air Outlet Mode Air Outlet Position Symbol A B Side Face Rear Foot FACE X BI-LEVEL FOOT X HINT: The size of the circle o indicates the proportion of airflow volume.

See also:
• REMOVAL