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2001 Chevrolet Corvette
2000-01 AUTOMATIC A/C-HEATER SYSTEMS Corvette
Fig. 1: Identifying HVAC Control Head
Courtesy of GENERAL MOTORS CORP.
AMBIENT TEMPERATURE SENSOR
Ambient Temperature Sensor (ATS) is located on right side of radiator upper support. Sensor
resistance changes as temperature of air outside of vehicle changes. Sensor low current signal
corresponds to actual temperature of outside air. Sensor low current signal is monitored by
HVAC control head.
BLOWER CONTROL MODULE
Blower control module is located under right side of dashboard, on blower motor assembly.
Module supplies voltage to blower motor. Depending on speed selected the voltage supplied will
be from 4 to 12 volts. The blower module receives a 12-volt pulse width signal from HVAC
control head. Signal width is increased as blower speed requested is increased.
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