LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2014 >> Verano Base >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System - Automatic >> Diagnostic Information and Procedures >> DTC B0223, B022A, B0233, B023A, B0408 or B0418: Recirculate Position Command/Air Flow Control/Temperature Control Circuit >> Circuit/System Description

Circuit/System Description

Stepper motors are used for temperature regulation, air distribution control and recirculation door control.

With the switches on the Radio/HVAC control, the air temperature door position, air distribution door position and recirculation door position can be selected. The selected values are passed to the HVAC control module via serial data. The HVAC control module supplies a 12 V reference voltage to the stepper motors and energizes the 4 stepper motor coils with a pulsed ground signal. The stepper motors put the door into the calculated position, in order to reach the desired temperature or mode position.

scientia non olet · About LEMON Manuals