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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 B0223, B0228, B0233, B0408, B0413, B0418, B0423, B1395, or B374A >> 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
Reference Voltage The control module consists of 1 internal 5 V reference circuits. The 5 V reference circuit provides 5 V for one or more sensors. All sensors will be affected when a short to ground or voltage is on a shared 5 V reference circuit.
Signal The control module input circuit has an internal resistance connected to 5 V.
Control - HVAC Actuators The output circuit is switched to 12 V to activate the component.orThe output circuit is switched to ground to activate the component.
Ground - Component Chassis Ground
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