AIR CONDITIONING SYSTEM — Refrigerant Lines, Thermistor AC-37 3. TIGHTENING TORQUE FOR O-RING AND BOLTED TYPE FITTINGS (See page AC-8) 4. EVACUATE AIR FROM AIR CONDITIONING SYSTEM 5. CHARGE AIR CONDITIONING SYSTEM WITH REFRIGERANT AND CHECK FOR GAS LEAKAGE Specified amount: 650 — 750 g (1.4 — 1.7 lb) THERMISTOR REMOVAL AND INSPECTION OF THERMISTOR 1. DISCONNECT NEGATIVE CABLE FROM BATTERY 2. REMOVE GLOVE BOX AND UNDER COVER 3. CHECK THERMISTOR INSTALLED OPERATION Using an ohmmeter, measure the resistance at the connector. Resistance: 1,500 Ω at 25°C (77°F) If resistance value is not as specified, replace the thermistor. 4. REMOVE THERMISTOR (a) Disconnect the connector. (b) Remove the screw and thermistor from the cooling unit. 5. CHECK THERMISTOR OPERATION (a) Place the thermistor in cold water. While varying the temperature of the water, measure the resistance at the connector and, at the same time, measure the temperature of the water with a thermometer. (b) Compare the two readings on the chart. If the intersection is not between the two lines, replace the thermistor. [DIAGRAM: Shows thermometer with ice, thermistor, and ohmmeter setup] Thermometer Ice Thermistor More than 10 cm (4 in.) Ohmmeter AC0375 [CHART: Graph showing Resistance (Ω) vs Temperature Y-axis: Resistance (Ω) from 3,500 to 5,500 X-axis: Temperature from -1 to 5°C and 30 to 40°F Shows diagonal shaded band trending downward from left to right] AC0448