Isuzu 2000 Trooper Workshop Manual page 126

The actuator changes the motor speed using the gear
and drives each door rotating the output axis united with
the sliding contact.
Legend
(1) Output Axis
(2) Motor
(3) Printed Circuit Board
(4) Sliding Contact
The mode and mix actuators are common actuators with
the built–in potentiometer. For the intake actuator, the
contact switch type is selected.
The potentiometer is a register assembled to the printed
circuit board of the mix and mode actuators. It detects the
air mix door position specified by rotation of the output
axis as a ratio of the variable terminal (VM) voltage
against the reference voltage (VDD: 5V), then signals the
value to the automatic heater/air conditioner control unit.
HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–97
Movement of Mix Actuator
Position of the air mix door is determined by the controller
on the automatic heater/air conditioner control unit.
As the heat or cool side of the controller is grounded, the
transistor on the driver is activated and, thus, the motor
rotation is turned on. The sliding contact connected to the
motor sends the position detection signal from the
potentiometer to the automatic heater/air conditioner
control unit.
temperature are balanced, the controller returns to the
neutral and the motor rotation is stopped.
(+) side
860RW026
C01RX016
As the set temperature and interior
I-45
Rotation
direction direction
(-) side
8 6 Clockwise
6 8 Counter
clockwise
Remarks
Full heat side
Full cool side
C01RX005