Page text (OCR transcript)
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.
