Control System Inputs

The DATC system has 4 control system inputs.

HVAC Control Module 

The DATC system uses a remote HVAC control module that is separate from the control interface. The FCIM provides the interface for the vehicle occupants to control the climate control system. When selections are made, the FCIM communicates the selections to the HVAC control module over the vehicle module communication network. The remote HVAC control module controls the climate control system based on the FCIM selections or automatically controls the climate control system in the AUTO mode.

In-Vehicle Temperature and Humidity Sensor 

The in-vehicle temperature and humidity sensor contains 2 thermistors which separately measure the in-vehicle air temperature and humidity and send those readings to the HVAC control module. The in-vehicle temperature and humidity sensor has an electric fan within the sensor that draws in-vehicle air across the thermistors.

Autolamp/Sunload Sensor (Light Sensor) 

The autolamp/sunload sensor supplies information to the DATC HVAC control module to lower the A/C temperature output in the vehicle's cabin, cooling the vehicle interior and occupants.

The autolamp/sunload sensor is also used by the exterior lighting system for autolamp operation. For removal and installation of the autolamp/sunload sensor, refer to Light Sensor in Exterior Lighting .

AAT Sensor 

The AAT sensor signal is received by the HVAC control module over the vehicle module communication network from the PCM.

For information regarding the outside air temperature display, refer to Instrumentation, Message Center, and Warning Chimes .