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HAC-24 < SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING] SYSTEM If the engine coolant temperature is 56 ° C (133 ° F) or less, to prevent a cold discharged air flow, A/C auto amp. suspends blower motor HIGH IN-VEHICLE TEMPERATURE STARTING CONTROL When evaporator temperature is high [intake sensor value is 35 ° C (95 ° F) or more], to prevent a hot dis- charged air flow, A/C auto amp. suspends blower motor activation for approximately 3 seconds so that evapo- FAN SPEED CONTROL AT DOOR MOTOR OPERATION When mode door motor is activated while air flow is more than the specified value, A/C auto amp. reduces AUTOMATIC AIR CONDITIONING SYSTEM : Air Inlet Control INFOID:0000000010432174 • A/C auto amp. controls intake door motor, and change air inlet. inlet (fresh air intake, 20% fresh air intake, or recirculation) AUTOMATIC AIR CONDITIONING SYSTEM : Compressor Control INFOID:0000000010432175 DESCRIPTION • When the compressor activation condition is satisfied while blower motor is activated, A/C auto amp. trans- mits A/C ON signal and blower fan ON signal to ECM. • ECM judges the conditions of each sensor (Refrigerant pressure sensor signal, accelerator position signal, etc.), and transmits the A/C compressor request signal to IPDM E/R via CAN communication line. • By receiving the A/C compressor request signal from ECM, IPDM E/R turns the A/C relay to ON, and acti- vates the compressor. Refer to PCS-7, "RELAY CONTROL SYSTEM : System Description" CONTROL BY A/C AUTO AMP. Low Temperature Protection Control When intake sensor detects that evaporator fin temperature is [ − 5.0 ° C (23.0 ° F)] or less, A/C auto amp. requests ECM to turn the compressor OFF, and stops the compressor. [1.0 ° C (33.8 ° F)] or more, the compressor is activated. Refrigerant Discharge Amount Control JMIIA1227GB JMIIA0711GB JMIIA2550GB |