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Home >> Chevrolet >> 2005 >> SSR Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 140 (Computer/Integrating Systems) >> Description And Operation >> Body Control System Description and Operation >> A/C Request >> Standard HVAC

Standard HVAC

WARNING: This page is about a different car, the 2005 Saturn L300. However, it is still accessible from the selected car via links, so may be relevant.

A/C request is made by the HVAC control head supplying voltage to circuit 66 to the BCM. The BCM will then request over the serial data link to the engine controller to operate the compressor. The BCM provides evaporator freeze protection by monitoring engine speed and ambient temperature.

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