AC-33 AIR CONDITIONING SYSTEM – TROUBLESHOOTING INSPECTION PROCEDURE 1 Check voltage between terminals TE and SG of A/C amplifier connector. ON Connect TE SG BE3840 N08796 P Remove A/C amplifier with connectors still connected. C 1. Turn ignition switch ON. 2. Measure voltage between terminal TE of SG of A/C amplifier connector at each temperature. OK Voltage: at 0°C (32°F): 2.0 ~ 2.4 V at 15°C (59°F): 1.4 ~ 1.8 V HINT: As the temperature increases, the voltage decreases gradually. NG OK Proceed to next circuit inspection shown on matrix chart (See page AC–26). However, if the light is still blinking, check and replace A/C amplifier. 2 Check evaporator temperature sensor. Thermometer Ice Ohmmeter More than 10 cm (3.94 in) N07725 P Remove evaporator temperature sensor (See page AC–106) C Check resistance between terminals 1 and 2 of evaporator temperature sensor connector at each temperature. OK Resistance: at 0°C (32°F): 4.5 ~ 5.2 k at 15°C (59°F): 2.0 ~ 2.7 k HINT: As the temperature increases, the resistance decreases gradually. OK NG Replace evaporator temperature sensor. 3 Check harness and connector between A/C amplifier and evaporator temperature sensor (See page IN–30). OK NG Repair or replace harness or connector. Check and replace A/C amplifier.