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HAC-142 < SYSTEM DESCRIPTION > [MANUAL AIR CONDITIONING] MANUAL AIR CONDITIONING SYSTEM COMPRESSOR CONTROL Description • BCM transmits the A/C ON signal and blower fan ON signal to ECM via CAN communication line only when the compressor operational condition is satisfied, and A/C indicator is turned ON. • 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. Compressor Protection Control at Pressure Malfunction The high-pressure side value that is detected by refrigerant pressure sensor is as per the following state, ECM 2 , 452 psi) or more (When the engine speed is less than 1,500 rpm) 1. A/C switch 2. Fan control dial 3. Rear window defogger switch 4. MODE dial 5. Intake switch 6. Temperature control dial A/C switch The compressor control (switch indicator) is turned ON ⇔ OFF each time by pressing this switch while the blower motor is activated. Fan control dial Fan speed can be adjusted within a range from 1st to 4th. Rear window defogger • Rear window defogger (switch indicator) is turned ON ⇔ OFF each time by pressing this switch. • Rear window defogger system details, Refer to . MODE dial • Mode position is selected to an optimal position by operating this dial. turn on and the air inlet becomes fresh air intake. Intake switch The air inlet changed ON ⇔ OFF each time by pressing this switch. • Indicator ON: Recirculation Temperature control dial The setting temperature can be selected to an optimum temperature by operating this dial. JPIIA1674ZZ |