2005 NISSAN NAVARA sensor

MTC-50
TROUBLE DIAGNOSIS
21 V Mode door motor feedback ON — 0 - 5V
22 SB Air mix door motor feedback ON — 0 - 5V
23 G Sensor power ON — 5V
25 LG Rear defroster status
26 P Sensor return ON — 0 - 5V
36 PPTC heater relay 1
(LHD models)ONRelay ON Battery voltage
Relay OFF 0V
37 LGPTC heater relay 2
(LHD models)ONRelay ON Battery voltage
Relay OFF 0V
38 BRPTC heater relay 3
(LHD models)ONRelay ON Battery voltage
Relay OFF 0V
39 YSeat heater
(LHD models)ONSeat heater ON Battery voltage
Seat heater OFF 0V
40 RMirror heater
(LHD models)ONMirror heater ON Battery voltage
Mirror heater OFF 0V
41 LCAN-H
(LHD models)ON — 0 - 5V
42 PCAN-L
(LHD models)ON — 0 - 5V Te r m i -
nal No.Wire
colorItemIgnition
switchConditionVoltage (V)
(Approx.)

TROUBLE DIAGNOSIS
MTC-51
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MTC
A/C System Self-diagnosis FunctionEJS005GA
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 all three front air control switches, after 3 seconds all three switches will illumi-
nate. After the three switches illuminate, press the A/C and rear defrost switches simultaneously. 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 toMTC-52, "
SELF-DIAGNO-
SISCODECHART".
MJIB0189E

MTC-52
TROUBLE DIAGNOSIS
SELF-DIAGNOSIS CODE CHART
Code No. Reference page
02 EE changed by calibration
04 Mode switch circuit open or shortMTC-58, "
Mode Door Motor Circuit"
05 Blower motor failureMTC-71, "Blower Motor Circuit"
20 BCM not responding to A/C requestMTC-79, "Magnet Clutch Circuit"
21 BCM not responding to rear defroster requestGW-47, "REAR WINDOW DEFOGGER"
22 Air mix door motor (front) circuit failureMTC-63, "Air Mix Door Motor Circuit"
34 Front potentio temperature control (PTC) failure
36 Air mix door motor (front) PBR circuit failureMTC-63, "
Air Mix Door Motor Circuit"
38 Air mix door motor (rear) circuit failureMTC-63, "Air Mix Door Motor Circuit"
56 Intake sensor circuit short
MTC-95, "Intake Sensor Circuit"57 Intake sensor circuit open
62 Defroster door motor circuit failure
80 CAN bus fault
LAN-3, "
Precautions When Using CONSULT-II"81 BCM CAN message missing
82 Intake door motor circuit failureMTC-68, "
Intake Door Motor Circuit"
90 Stuck switch
92 Mode door motor circuit failureMTC-58, "
Mode Door Motor Circuit"

MTC-56
TROUBLE DIAGNOSIS
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
motors, 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 (NAVI equipped vehicles only).
Potentio Temperature Control (PTC)
The PTC is built into the front air control. It can be set from cold to
hot or any intermediate position by rotating the temperature dial.
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM
SYMPTOM: A/C system does not come on.
MJIB0320E
MJIB0230E
MJIB0190E

TROUBLE DIAGNOSIS
MTC-79
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MTC
Magnet Clutch CircuitEJS005GL
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
*1MTC-53, "Operational Check"*2MTC-51, "A/C System Self-diagnosis
Function".*3MTC-52, "
SELF-DIAGNOSIS CODE
CHART".
*5MTC-95, "
Intake Sensor Circuit".
MJIB0242E

MTC-80
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
The front air control controls compressor operation based on intake temperature and a signal from ECM.
Low Temperature Protection Control
The front air control will turn the compressor ON or OFF as determined by a signal detected by the intake sen-
sor.
When intake air temperature is higher than the preset value, the compressor turns ON. The compressor turns
OFF when intake air temperature is lower than the preset value. That preset value is dependent on the ambi-
ent temperature, refer to the following table.
DIAGNOSTIC PROCEDURE FOR MAGNET CLUTCH
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
1.CHECK INTAKE SENSOR CIRCUIT
Check intake sensor. Refer toMTC-95, "
Intake Sensor Circuit".
OK or NG
OK >> GO TO 2.
NG >> Malfunctioning tintake sensor. Refer toMTC-99, "
INTAKE SENSOR".
Ambient temperature°C(°F)Compressor ON
intake temperature C (°F)Compressor OFF
intake temperature C (°F)
0 (32) 5.5 (42) 5.0 (41)
10 (50) 4.5 (40) 4.5 (40)
20 (68) 2.5 (37) 2.0 (36)
30 (86) 2.0 (36) 1.5 (35)
40 (104) 2.0 (36) 1.5 (35)
50 (122) 2.0 (36) 1.5 (35)
MJIB0322E

TROUBLE DIAGNOSIS
MTC-83
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MTC
8.CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-II
1. Start engine.
2. Check voltage of refrigerant pressure sensor. Refer toBCS-14, "
CONSULT-II Function (BCM)".
WITHOUT CONSULT-II
1. Start engine.
2. Check voltage between ECM harness connector F1 terminal 53
and ground.
OK or NG
OK >>lWITH CONSULT-II
GO TO 9.
lWITHOUT CONSULT-II
GO TO 10.
NG >> Refer toEC-325, "
REFRIGERANT PRESSURE SENSOR".
9.CHECK BCM INPUT (FAN ON) SIGNAL
Check FAN ON/OFF signal. Refer toBCS-14, "
CONSULT-II Func-
tion (BCM)".
OK or NG
OK >> GO TO 12.
NG >> GO TO 10.
Terminals
Condition Voltage (+)
(-)
ECM
connectorTerminal No.
F1 53 Ground A/C switch: ON Approx. 0.36 - 3.88V
MJIB0071E
BLOWER CONTROL
SWITCH ON: FAN ON SIG ON
BLOWER CONTROL
SWITCH OFF:FANONSIGOFF
WJIA0469E

TROUBLE DIAGNOSIS
MTC-85
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MTC
12.CHECK SELF-DIAGNOSTIC RESULT
Perform self-diagnosis. Refer toAT C - 5 5 , "
A/C System Self-diagnosis Function"
OK or NG
OK >> Inspection End.
NG >> Refer toAT C - 5 6 , "
SELF-DIAGNOSIS CODE CHART".
COMPONENT INSPECTION
Refrigerant Pressure Sensor
The refrigerant pressure sensor is attached to the condenser.
MJIB0197E