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HAC-152 < SYSTEM DESCRIPTION > [MANUAL AIR CONDITIONING] SYSTEM sensor is used when engine coolant temperature is low [less than approximately 56 ° C (133 ° F)]. The mem- ory data (before the ignition switch is OFF) when the engine is warmed up [approximately 56 ° C (133 ° F) or more]. - The correction of the ambient temperature is not performed when the detection temperature of the ambient temperature is less than approximately − 20 ° C (–4 ° F). Intake temperature correction - A/C amp. inputs the temperature detected by intake sensor as the intake temperature (evaporator tempera- ture). - A/C amp. performs the correction of the temperature detected by intake sensor for air conditioning control. ference between the detected intake temperature and the recognition intake temperature. If the difference is CONTROL BY ECM HAC-152, "MANUAL AIR CONDITIONING SYSTEM : Compressor Control" CONTROL BY IPDM E/R HAC-152, "MANUAL AIR CONDITIONING SYSTEM : Compressor Control" MANUAL AIR CONDITIONING SYSTEM : Air Inlet Control INFOID:0000000010432505 DESCRIPTION • A/C amp. controls the intake door motor and switches the air inlets. temperature protection control. • When the following conditions are met, A/C amp. controls the air inlets to 20% recirculation. (However, this does not occur when high water temperature control is in effect.) - Fan control dial: 21st - 24th HIGH ENGINE COOLANT TEMPERATURE CONTROL When either of the following conditions is met, A/C amp. changes the air inlets to recirculation. Condition 1 • Air outlet: Other than D/F or DEF ° C (77 ° F) • Vehicle speed: 30 km/h or more ° C (221 ° F) or more Condition 2 • Air outlet: D/F or DEF ° C (77 ° F) • Vehicle speed: 30 km/h or more ° C (221 ° F) or more MANUAL AIR CONDITIONING SYSTEM : Compressor Control INFOID:0000000010432506 DESCRIPTION • When the compressor activation condition is satisfied while blower motor is activated, A/C amp. transmits 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 AMP. Low Temperature Protection Control |