General Information

The purpose of the heater is to supply heat to the interior of the vehicle. The vehicle operator can determine the level of heat by turning the air temperature switch, located on the HVAC control module, to any setting. The temperature switch can change the vehicle's air temperature regardless of the HVAC mode setting, heater or A/C.

The HVAC control module receives power from the instrument panel fuse block on the ignition 3 voltage circuit along with the battery positive circuit. The module is grounded by the ground circuits through a splice pack. The HVAC control module communicates directly to the Powertrain Control Module (PCM) on the class 2 serial data and ECM/PCM/VCM class 2 serial data circuits through a splice pack.