Mode Door Motor

COMPONENT DIAGNOSIS

MODE DOOR MOTOR

System Description

SYSTEM DESCRIPTION

Component Parts
Mode door control system components are:
- A/C auto amp.
- A/C and AV switch assembly
- Mode door motor (front)
- PBR (built into mode door motor)
- In-vehicle sensor
- Ambient sensor
- Optical sensor
- Intake sensor

System Operation
The mode door position (vent, B/L, foot, D/F, and defrost) is set by the A/C auto amp. by means of the mode door motor (front). When a mode door position is selected on the A/C auto amp., voltage is applied to one circuit of the mode door motor (front) while ground is applied to the other circuit, causing the mode door motor (front) 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 A/C auto amp. monitors the mode door position by measuring the voltage signal on the PBR circuit.

In AUTO mode the mode door position is set by the A/C auto amp. which determines the proper position based on inputs from the in-vehicle sensor, ambient sensor, optical sensor, intake sensor, and the temperature selected by the driver or passenger.









Mode Door Control Specification

COMPONENT DESCRIPTION

Mode Door Motor (Front)




The mode door motor (front) is attached to the heater & cooling unit assembly. It rotates so that air is discharged from the outlet as indicated by the A/C auto amp. Motor rotation is conveyed to a link which activates the mode door.

Mode Door Motor (Front) Component Function Check

INSPECTION FLOW

Step 1-6:

Step 7-9:

Mode Door Motor (Front) Diagnosis Procedure

Step 1-2:

Step 2 (Continued)-6:

Step 7-11:

Step 11 (Continued)-12: