Air Mix Door Motor (Front) Circuit
Air Mix Door Motor (Front) CircuitSYMPTOM:
- Discharge air temperature does not change.
- Air mix door motor (front) does not operate.
Inspection Flow:
INSPECTION FLOW
SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
- Front air control
- Air mix door motor (front)
- PBR (built into air mix door motor)
- Intake sensor
System Operation
The front air control receives data from the temperature selected by the driver. The front air control then applies a voltage to one circuit of the air mix door motor, while ground is applied to the other circuit, causing the air mix door motor to rotate. The direction of rotation is determined by which circuit has voltage applied to it, and which one has ground applied to it. The front air control monitors the air mix door positions by measuring the voltage signal on the PBR circuits of each door.
Air Mix Door Control Specification
COMPONENT DESCRIPTION
Air Mix Door Motor (Front)
The air mix door motor is attached to the front heater & cooling unit.
This motor rotates so that the air mix door is opened or closed to a position set by the front air control. Motor rotation is then conveyed through a shaft and the air mix door position is then fed back to the front air control by the PBR built into the air mix door motor.
Diagnostic Procedure For Air Mix Door Motor (Front) (Steps 1 - 3):
Diagnostic Procedure For Air Mix Door Motor (Front) (Steps 4 - 6):
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR (FRONT)