General

General

The control system operates the A/C (air conditioning) system and the heating and ventilation system to control the temperature, volume and distribution of air from the heater.

Either a manual or an automatic control system is installed in the vehicle. The manual system maintains a constant heater outlet temperature, to both sides of the passenger compartment, with manual control of the intake air source, blower speed and air distribution. The automatic system automatically adjusts the temperature, volume and distribution of the air from the heater to maintain the individual temperature levels selected for the LH (left-hand) and RH (right-hand) sides of the passenger compartment. The automatic system also has manual overrides for the intake air source, blower speed and air distribution.

Both the manual and the automatic systems incorporate:
^ An in-vehicle temperature sensor.
^ A refrigerant pressure sensor.
^ An evaporator temperature sensor.
^ A heater temperature sensor.
^ An auxiliary coolant pump.
^ A coolant valve.

The automatic system also incorporates:
^ A second heater temperature sensor.
^ A sunlight sensor.
^ A pollution sensor.