Contents Wiring diagrams Section: Automatic HVAC System All sections

A/c-Heater System - Automatic: Overview Toyota Supra A80

Automatic HVAC System 1 illustration

DESCRIPTION & OPERATION

Automatic temperature control system is a cycling clutch type with an expansion valve. (Scheme 3)

Sensors respond to various conditions in A/C system and provide signals for A/C-heater control panel and A/C amplifier. Based on signals from sensors, A/C-heater control panel and A/C amplifier control operation of compressor clutch and air control door servomotors.

  1. Ambient temperature sensor monitors outside air temperature.
  2. In-vehicle temperature sensor monitors passenger compartment air temperature.
  3. Engine coolant temperature sensor monitors engine coolant temperature.
  4. Solar sensor monitors sunlight load.
  5. Evaporator temperature sensor monitors evaporator temperature.

Scheme 3

Scheme 3