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MANUAL A/C DIAGNOSIS TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55A-256 12 A/C pressure sensor Ignition switch: ON 5 V 13 − 15 − − − 16 Potentiometer power supply Ignition switch: ON 5 V 17 Power transistor (BASE) When the blower speed 1 V 18 Power transistor When the blower speed 7.5 V 19 − − − 20 Sensors and potentiometers Always 0 V 21 Mode selection damper control When the damper has moved to 0.7 − 1.3 V 22 − − − 23 Ambient air temperature sensor When sensor temperature is °C (77°F) [4 kΩ] 1.9 V 24 − − − 25 Air thermo sensor input When sensor temperature is °C (77°F) [1.5 kΩ] 2.2 V 26 A/C pressure sensor at 2.6 MPa 3.9 V 27 Ground Always 0 V 28 Power supply to the ignition Ignition switch: ON Battery positive voltage 29 Air mixing damper control motor When the damper door has 0.7 − 1.3 V 30 Illumination ground Always 0 V 31 ILL power supply Lighting switch: ON Battery positive voltage 32, 33 − − − 34 A/C pressure sensor ground Always 0 V 36 Power supply to the ignition Ignition switch: ON Battery positive voltage TERMINAL CHECK ITEM CHECKING REQUIREMENTS NORMAL CONDITION |