sensor NISSAN NAVARA 2005 Repair Workshop Manual

AIR CONDITIONER CONTROL
ATC-27
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AT C
MAGNET CLUTCH CONTROL
When A/C switch or DEF switch is pressed, front air control inputs compressor ON signal to BCM.
BCM sends compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant pressure sen-
sor signal, throttle angle sensor, etc.). If it judges compressor can be turned ON, it sends compressor ON sig-
nal to IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate com-
pressor.
SELF-DIAGNOSTIC SYSTEM
The self-diagnostic system is built into the front air control to quickly locate the cause of symptoms. Refer to
AT C - 5 5 , "
A/C System Self-diagnosis Function".
WJIA1163E

ATC-28
AIR CONDITIONER CONTROL
Description of Control System
EJS006B2
The control system consists of input sensors, switches, the front air control (microcomputer) and outputs.
The relationship of these components is shown in the figure below:
Control OperationEJS006B3
Front air control
WJIA1279E
MJIB0333E

TROUBLE DIAGNOSIS
ATC-53
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Front Air Control Terminals and Reference ValueEJS006BF
Measure voltage between each terminal and ground by following
Terminals and Reference Value for front air control.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR FRONT AIR CONTROL
MJIB0327E
MJIB0159E
Te r m i -
nal No.Wire
colorItemIgnition
switchConditionVo l ta g e (V )
(Approx.)
1 BR Mode door motor CW ON Clockwise rotation Battery voltage
2 W Air mix door motor (Driver) CW ON Clockwise rotation Battery voltage
3 G Air mix door motor (Driver) CCW ON Counterclockwise rotation Battery voltage
4 Y Intake door motor CW ON Counterclockwise rotation Battery voltage
5 O Intake door motor CCW ON Clockwise rotation Battery voltage
6 P Power supply for IGN ON - Battery voltage
7 Y Seat heater (LHD models) ONSeat heater ON Battery voltage
Seat heater OFF 0V
8 G Illumination + ON Park lamps ON Battery voltage
9 B Illumination - - Park lamps ON
10 W Compressor ON signalON A/C switch OFF 5V
ON A/C switch ON 0V
11 Y Rear defrost request ON - Battery voltage
12 L Intake sensor ON - 0 - 5V
13 V Sensor ground ON - 0 - 5V
14 R Mode door motor CCW ON Counterclockwise rotation Battery voltage
15 P Air mix door motor (Passenger) CW ON Clockwise rotation Battery voltage
16 LGAir mix door motor (Passenger)
CCWON Counter clockwise rotation Battery voltage
PIIA2344E

ATC-54
TROUBLE DIAGNOSIS
19 GR Power supply for BAT - - Battery voltage
20 B Ground - - 0V
21 V Mode door motor feedback ON - 0 - 5V
22 SB Air mix door motor (Driver) feedback ON - 0 - 5V
23 G Sensor power ON - 5V
26 P Sensor return ON - 0V
27 R In-vehicle sensor signal ON - 0 - 5V
28 W Ambient sensor ON - 0 - 5V
29 G Optical sensor (Driver) ON - 0 - 5V
31 PPTC heater relay 1
(LHD models)ONRelay ON Battery voltage
Relay OFF 0V
32 V Variable blower control ON - 0 - 5V
33 BR In-vehicle sensor motor (+) ON - Battery voltage
34 O In-vehicle sensor motor (-) ON - 0V
35 LG Fan ON signalON Blower switch OFF 5V
ON Blower switch ON 0V
36 SBAir mix door motor (Passenger)
feedbackON - 0 - 5V
37 GR Optical sensor (Passenger) ON - 0 - 5V
38 B Blower request ONBlower motor OFF Battery voltage
Blower motor ON 0V
40 LGPTC heater relay 2
(LHD models)ONRelay ON Battery voltage
Relay OFF 0V
41 L CAN-H ON - 0 - 5V
42 P CAN-L ON - 0 - 5V
43 BRPTC heater relay 3
(LHD models)ONRelay ON Battery voltage
Relay OFF 0V
44 R Mirror heater (LHD models) ONHeater OFF 0V
Heater ON Battery voltage Te r m i -
nal No.Wire
colorItemIgnition
switchConditionVoltage (V)
(Approx.)

TROUBLE DIAGNOSIS
ATC-55
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A/C System Self-diagnosis FunctionEJS006BG
DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. Refer to applicable sections
(items) for details. Shifting from usual control to the self-diagnostic system is accomplished by turning the igni-
tion switch ON and pressing the down blower arrow switch while turning the passenger temperature dial in
either direction (hold momentarily). Within 3 seconds of doing this, press the AUTO switch. The blower bars
will flash and the ambient temperature display will indicate 0°during the self-diagnosis. Fault codes (if any are
present) will be displayed in the ambient temperature display area. Refer toAT C - 5 6 , "
SELF-DIAGNOSIS
CODE CHART".
MJIB0334E

ATC-56
TROUBLE DIAGNOSIS
SELF-DIAGNOSIS CODE CHART
Code No. Reference page
02 EE changed by calibrationATC-116, "
REMOVAL"
12 Air mix door motor (Driver) circuit malfunctionATC-73, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (PASSENGER)"
20 BCM not responding to A/C requestATC-88, "DIAGNOSTIC PROCEDURE FOR MAGNET
CLUTCH"
21 BCM not responding to rear defroster requestGW-47, "REAR WINDOW DEFOGGER"
22 Air mix door motor (Passenger) circuit malfunctionATC-71, "DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR
MOTOR (DRIVER)"
30 In-vehicle sensor circuit out of range (low)
ATC-108, "In-vehicle Sensor Circuit"31 In-vehicle sensor circuit out of range (high)
40 Ambient sensor 1 circuit short
ATC-105, "
Ambient Sensor Circuit"41 Ambient sensor 1 circuit open
50 Optical sensor (Driver) circuit open or short
ATC-112, "
Optical Sensor Circuit"52 Optical sensor (Passenger) circuit open or short
56 Intake sensor circuit short
ATC-114, "
Intake Sensor Circuit"57 Intake sensor circuit open
62 Defroster door motor circuit malfunction
80 CAN bus fault
LAN-3, "
Precautions When Using CONSULT-II"81 BCM CAN message missing
82 Intake door motor (driver) circuit malfunctionATC-79, "
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR
MOTOR"
90 Stuck buttonATC-116, "REMOVAL"
92 Mode door motor circuit malfunctionATC-63, "Mode Door Motor Circuit"

TROUBLE DIAGNOSIS
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COMPONENT DESCRIPTION
Front Air Control
The front air control has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motors, mode door motor, intake door
motor, defroster door motor, blower motor and compressor are then
controlled.
The front air control is unitized with control mechanisms. When the
various switches and temperature dials are operated, data is input to
the front air control.
Self-diagnostic functions are also built into the front air control to pro-
vide quick check of malfunctions in the auto air conditioner system.
Potentio Temperature Control (PTC)
There are two PTCs (passenger and driver) built into the front air
control. They can be set at an interval of 0.5°C(1.0°F) in the 18°C
(60°F) to 32°C(90°F) temperature range by rotating the temperature
dial. The set temperature is displayed.
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
MJIB0327E
MJIB0344E
MJIB0180E

ATC-64
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
lFront air control
lMode door motor
lPBR (built into mode door motor)
lIn-vehicle sensor
lAmbient sensor
lOptical sensor
lIntake sensor
System Operation
The mode door position (vent, B/L, foot, and defrost) is set by the front air control by means of the mode door
motor. When a mode door position is selected on the front air control, voltage is applied to one circuit of the
mode door motor while ground is applied to the other circuit, causing the mode door motor to rotate. The direc-
tion 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 mode door position by measuring the voltage signal on the PBR circuit.
In AUTO mode the mode door position is set by the front air control 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
WJIA1240E
WJIA0434E

TROUBLE DIAGNOSIS
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SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
lFront air control.
lAir mix door motors (driver and passenger)
lPBR (built into air mix door motors)
lIn-vehicle sensor
lAmbient sensor
lOptical sensor
lIntake sensor
System Operation
The front air control receives data from the temperature selected by the driver side and passenger side. The
front air control then applies a voltage to one circuit of the appropriate air mix door motor, while ground is
applied to the other circuit, causing the appropriate 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 con-
trol monitors the air mix door positions by measuring the voltage signal on the PBR circuits of each door.
In AUTO mode the air mix, intake, mode door, and defrost door positions are set by the front air control 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 and front passengers.
Subsequently, HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new
door position data is returned to the front air control.
Air Mix Door Control Specification
MJIB0330E
WJIA0435E

ATC-78
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
lFront air control
lIntake door motor
lIn-vehicle sensor
lAmbient sensor
lOptical sensor
lIntake sensor
System Operation
The intake door control determines the intake door position based on the position of the recirculation switch.
When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and
recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the
opposite direction, again allowing fresh air into the cabin.
In the AUTO mode, the front air control determines the intake door position based on the ambient tempera-
ture, the intake air temperature and the in-vehicle temperature. When the DEFROST, or OFF switches are
pushed or A/C switch is OFF, the front air control sets the intake door at the fresh position.
Intake Door Control Specification
WJIA0551E
WJIA0436E