The following sensors affect the automatic control of the
in-vehicle temperature.
Both of the sensors are temperature-sensitive thermisters. The resistance
of the sensors varies inversely to the temperature. The resistance value determines
level of the signal that is sent to the heater-A/C control. The heater-A/C
control microprocessor uses this information in order to develop command
signals for the following components:
| • | The vacuum solenoid module |
| • | The temperature motor actuator |
| • | The blower motor pulse width module |
A hose duct connects the in-vehicle sensor housing to an aspirator.
Air flow from the HVAC module creates a slight vacuum at the aspirator end
of the hose. This vacuum completes the following functions:
| • | Draws in-vehicle air over the in-vehicle sensor |
| • | Improves the accuracy of the cabin temperature that is predicted
by the sensor |
