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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 99 (HVAC - Automatic) >> Diagnostic Information and Procedures >> DTC B393B >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

For an overview of the component/system, refer to:Automatic HVAC Description and Operation 

Circuit Description
Control - Terminal 2 The output circuit is switched to 12 V to enable the component(s).
Control - Terminal 1 The output is PWM controlled.
Component Description
Q46 A/C Compressor Solenoid Valve The solenoid valve controls the displacement of the A/C compressor and by that, how much refrigerant is pumped per revolution.
K33 HVAC Control Module The control module controls a series of actuators to ensure optimal heating, ventilation and air conditioning of the passenger compartment. The control module does this by reading values from a variety of sensors and interprets the data and adjusts the actuators accordingly.