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AUTOMATIC A/C DIAGNOSIS TSB Revision AUTOMATIC AIR CONDITIONING 55B-3 COMPRESSOR CONTROL When operating the A/C switch • The air thermo sensor, which senses the temper- ature of the air flowing out of the evaporator, °C (37.4°F) or below. • The A/C pressure sensor turns OFF when the refrigerant pressure becomes excessively high or • When the air thermo sensor is activated, and the ignition switch, blower switch, and A/C switch are When operating the mode selection dial • The A/C will work when the mode selection dial is set to the "Defroster" or "Defroster/foot" position, . A/C Compressor Clutch Relay ON Conditions AUTOMATIC A/C DIAGNOSIS INTRODUCTION M1554006200095 After air is taken in through the damper, it is fed to comfortable temperature. If the A/C does not operate Ignition switch (IG2) ON NOTE: A/C compressor clutch relay is *
communicate with the ECM. If the air ° C (37.4 ° F), the A/C-ECU will turn off the A/C compressor clutch relay. Blower speed selection dial ON A/C switch ON Mode selection dial defroster Temperature control dial MAXIMUM Air thermo sensor * Pressure detected 2.94 MPa (427 psi) or less [If ON 0.19 MPa (27psi) or more [If A/C compressor clutch relay driving transistor ON |