2006 NISSAN PATROL Service Manual

Overview of Control System
The control system consists of input sensors, switches, the automatic ampli®er (microcomputer) and outputs.
The relationship of these components is shown in the diagram below:
RHA732G
DESCRIPTIONAUTO
HA-52

Control Operation
Display screen
Displays the operational status of the system.
AUTO switch
The compressor, intake doors, air mix door, outlet doors, and blower speed are automatically controlled so
that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the operator.
Temperature dial (Potentio Temperature Control)
Increases or decreases the set temperature.
OFF switch
The compressor and blower are OFF, the intake doors are set to the outside air position, and the air outlet
doors are set to the foot (80% foot and 20% defrost) position.
FAN switch
Manual control of the blower speed. Four speeds are available for manual control (as shown on the display
screen):
low
, medium low, medium high, high
RECIRCULATION switch
OFF position: Automatic control resumes.
ON position: Interior air is recirculated inside the vehicle.
DEFROSTER switch
Positions the air outlet doors to the defrost position. Also positions the intake doors to the outside air position.
MODE switch
Control the air discharge outlets.
RHA727G
DESCRIPTIONAUTO
HA-53

FRESH switch
OFF position: Automatic control resumes.
ON position: Outside air is drawn into the passenger compartment.
A/C switch
Manual control of the compressor operation. When the A/C switch indicator illuminates, compressor operation
is being carried out.
DESCRIPTIONAUTO
Control Operation (Cont'd)
HA-54

Component Location
ENGINE COMPARTMENT
RHA697G
TROUBLE DIAGNOSESAUTO
HA-55

PASSENGER COMPARTMENT
RHA698G
TROUBLE DIAGNOSESAUTO
Component Location (Cont'd)
HA-56

Circuit Diagram
THA153
TROUBLE DIAGNOSESAUTO
HA-57

Wiring Diagram Ð A/C, A Ð
YHA159
TROUBLE DIAGNOSESAUTO
HA-58

YHA160
TROUBLE DIAGNOSESAUTO
Wiring Diagram Ð A/C, A Ð (Cont'd)
HA-59