Metro L3-061 1.0L VIN 6 TBI (1998)
Control Module HVAC: Description and Operation
Compressor Control Module
The air conditioning (A/C) compressor control module controls the operation of the compressor clutch in response to the signals received from the
following components:
^
The A/C ON/OFF switch
^
The A/C refrigerant pressure switch
^
The refrigerant (evaporator) temperature sensor
^
The powertrain control module (PCM)
With the A/C system in operation the A/C compressor control module performs the following functions:
^
Energizes the compressor clutch in response to the following conditions:
-
An A/C system ON request
-
The determination of favorable system conditions for A/C operation
^
De-energizes the compressor clutch in response to the following conditions:
-
A high refrigerant pressure signal from the A/C refrigerant pressure switch
-
A low refrigerant pressure signal from the A/C refrigerant pressure switch
-
A low evaporator temperature signal from the refrigerant (evaporator) temperature sensor
-
A high engine demand signal from the PCM
-
An A/C system OFF request
