Celica Supra L6-2759cc 5M Ser (1982)
Ambient Temperature Sensor / Switch HVAC: Testing and Inspection
When there is an open in the sensor circuit, the system will operate at maximum hearing, and when there is a short in the circuit, the system will operate
at maximum cooling. To check sensor circuit, proceed as follows:
1.
Make sure that air is being drawn through the in-car sensor when the system is operating.
2.
Check resistance of sensors. The in-car sensor should have a resistance of 1700-5600 ohms. The ambient sensor should have a resistance of
400-600 ohms.
3.
Check voltage output of solar sensor, if equipped. Sensor voltage should be 0.3-0.5 volts in daylight.
4.
If sensor values are not as specified, replace affected sensor.
