Introduction

The Electronic Automatic Temperature Control (EATC) system provides automatic regulation of the vehicle's interior temperature. The system is based on the operator selected "set temperature", regardless of the outside temperature changes. This is done by utilizing a microcomputer, also referred to as the EATC unit, which receives input signals from the following five sensors:
- Ambient temperature sensor
- In-vehicle temperature sensor
- Engine coolant ambient temperature sensor
- Sunload sensor
- PBR (Potentio Balance Resistor).

The EATC unit uses these input signals (including the set temperature) to automatically control:
- Outlet air volume
- Air temperature
- Air distribution.