ignition NISSAN NAVARA 2005 Repair Owners Manual

TROUBLE DIAGNOSIS
ATC-91
C
D
E
F
G
H
I
K
L
MA
B
AT C
8.CHECK REFRIGERANT PRESSURE SENSOR
WITH CONSULT-II
1. Start engine.
2. Check voltage of refrigerant pressure sensor. Refer toAT C - 3 3 , "
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 toAT C - 3 3 , "
CONSULT-II Function
(BCM)".
OK or NG
OK >> GO TO 12.
NG >> GO TO 10.
10.CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front air control connector.
3. Check continuity between BCM harness connector M42 terminal
26 and front air control harness connector M61 terminal 35.
OK or NG
OK >> GO TO 11.
NG >> Repair harness or connector.
Te r m i n a l s
ConditionVo l ta g e
(Approx.) (+)
(-)
ECM con-
nectorTerminal No.
F1 53 Ground A/C switch: ON 0.36 - 3.88V
MJIB0071E
FRONT BLOWER CONTROL
DIAL ON: FAN ON SIG ON
FRONT BLOWER CONTROL
DIAL OFF:FANONSIGOFF
WJIA0469E
26 - 35 Continuity should exist.
MJIB0072E

ATC-92
TROUBLE DIAGNOSIS
11 .CHECK VOLTAGE FOR FRONT AIR CONTROL (FAN ON SIGNAL)
1. Reconnect BCM connector and front air control connector.
2. Turn ignition switch ON.
3. Check voltage between front air control harness connector M61
terminal 35 and ground.
OK or NG
OK >> GO TO 12.
NG-1 >> If the voltage is approx. 5V when blower motor is ON, replace front air control. Refer toAT C - 11 6 ,
"REMOVAL".
NG-2 >> If the voltage is approx. 0V when blower motor is OFF, replace BCM. Refer toBCS-17, "
Removal
and Installation of BCM".
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.
Terminals
ConditionVoltage
(Approx.) (+)
(-)
Front air con-
trol connectorTerminal No.
M61 35 GroundA/C switch: ON
Blower motor
operates0V
A/C switch: OFF 5V
WJIA1139E
MJIB0167E

TROUBLE DIAGNOSIS
ATC-105
C
D
E
F
G
H
I
K
L
MA
B
AT C
Ambient Sensor CircuitEJS006BW
COMPONENT DESCRIPTION
Ambient Sensor
Ambient sensor is attached to the radiator core support (left side). It
detects ambient temperature and converts it into a resistance value
which is then input into the front air control.
AMBIENT TEMPERATURE INPUT PROCESS
The front air control includes a processing circuit for ambient sensor input. However, when the temperature
detected by ambient sensor increases quickly, the processing circuit retards the front air control function. It
only allows the front air control to recognize an ambient temperature increase of 0.33°C(0.6°F) per 100 sec-
onds.
This prevents constant adjustments due to momentary conditions, such as stopping after high speed driving.
Although the actual ambient temperature has not changed, the temperature detected by ambient sensor will
increase. This is because the heat from the engine compartment can radiate to the front grille area, location of
ambient sensor .
DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR
SYMPTOM: Ambient sensor circuit is open or shorted. (40 or 41 is
indicated on front air control as a result of conducting the front air
control self-diagnosis)
1.CHECK VOLTAGE BETWEEN AMBIENT SENSOR AND GROUND
1. Disconnect ambient sensor connector.
2. Turn ignition switch ON.
3. Check voltage between ambient sensor harness connector E48
terminal 4 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
MJIB0168E
MJIB0090E
4 - Ground : Approx. 5V
MJIB0091E

ATC-106
TROUBLE DIAGNOSIS
2.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between ambient sensor harness connector
E48 terminal 3 and front air control harness connector M60 ter-
minal 13.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK AMBIENT SENSOR
Refer toATC-107, "
Ambient Sensor".
OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosisAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagno-
sis.
NG >> 1. Replace ambient sensor.
2. Go to self-diagnosisAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagno-
sis.
4.CHECK CIRCUIT CONTINUITY BETWEEN AMBIENT SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between ambient sensor harness connector
E48 terminal 4 and front air control harness connector M61 ter-
minal 28.
4. Check continuity between ambient sensor harness connector
E48 terminal 4 and ground.
OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosisAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagno-
sis.
NG >> Repair harness or connector.3 - 13 : Continuity should exist.
MJIB0092E
4 - 28 : Continuity should exist.
4 - Ground : Continuity should not exist.
MJIB0093E

TROUBLE DIAGNOSIS
ATC-109
C
D
E
F
G
H
I
K
L
MA
B
AT C
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR
SYMPTOM: In-vehicle sensor circuit is open or shorted. (44 or 46 is
indicated on front air control as a result of conducting self-diagnosis.)
1.CHECK IN-VEHICLE SENSOR CIRCUIT
Are diagnostic codes 44 or 46 present?
YES or NO
YES >> GO TO 6.
NO >> GO TO 2.
2.CHECK VOLTAGE BETWEEN IN-VEHICLE SENSOR AND GROUND
1. Turn ignition switch OFF.
2. Disconnect in-vehicle sensor connector.
3. Turn ignition switch ON.
4. Check voltage between in-vehicle sensor harness connector
M50 terminal 4 and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 5.
3.CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector M60.
3. Check continuity between in-vehicle sensor harness connector
M50 terminal 1 and front air control harness connector M60 ter-
minal 13.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4.CHECK IN-VEHICLE SENSOR
Refer toAT C - 111 , "
In-vehicle Sensor".
OK or NG
OK >> 1. Replace front air control.
2. Go toAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagnosis.
NG >> 1. Replace in-vehicle sensor.
2. Go toAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagnosis.
WJIA1146E
4 - Ground : Approx. 5V.
LJIA0089E
1 - 13 : Continuity should exist.
WJIA1147E

ATC-110
TROUBLE DIAGNOSIS
5.CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between in-vehicle sensor harness connector
M50 terminal 4 and front air control harness connector M61 ter-
minal 27.
4. Check continuity between in-vehicle sensor harness connector
M50 terminal 4 and ground.
OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosisAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagno-
sis.
NG >> Repair harness or connector.
6.CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR MOTOR AND FRONT AIR CON-
TROL (SELF-DIAGNOSIS CODES 44 OR 46)
1. Turn ignition switch OFF.
2. Disconnect front air control connector and in-vehicle sensor con-
nector.
3. Check continuity between in-vehicle sensor harness connector
M50 terminal 2 and 3 and front air control harness connector
M61 terminal 34 and 33.
4. Check continuity between in-vehicle sensor harness connector
M50 terminal 2 and 3 and ground.
OK or NG
OK >> 1. Replace front air control.
2. Go toAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagnosis.
NG >> Repair harness or connector.4 - 27 : Continuity should exist.
4 - Ground : Continuity should not exist.
WJIA1148E
2 - 34 : Continuity should exist.
3 - 33 : Continuity should exist.
2, 3 - Ground : Continuity should not exist.
WJIA1149E

ATC-112
TROUBLE DIAGNOSIS
Optical Sensor Circuit
EJS006BY
COMPONENT DESCRIPTION
The optical sensor is located in the center of the defroster grille. It
detects sunload entering through windshield by means of a photo
diode. The sensor converts the sunload into a current value which is
then input into the front air control.
OPTICAL INPUT PROCESS
The front air control includes a processing circuit which averages the variations in detected sunload over a
period of time. This prevents adjustments in the ATC system operation due to small or quick variations in
detected sunload.
For example, consider driving along a road bordered by an occasional group of large trees. The sunload
detected by the optical sensor will vary whenever the trees obstruct the sunlight. The processing circuit aver-
ages the detected sunload over a period of time, so that the (insignificant) effect of the trees momentarily
obstructing the sunlight does not cause any change in the ATC system operation. On the other hand, shortly
after entering a long tunnel, the system will recognize the change in sunload, and the system will react accord-
ingly.
DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR
SYMPTOM: Sunload sensor circuit is open or shorted. (44 or 46 is
indicated on front air control as a result of conducting self-diagnosis).
1.CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector and sunload sensor con-
nector.
3. Check continuity between sunload sensor harness connector
M63 terminal 1 and 2 and front air control harness connector
M61 terminal 29 and 37.
4. Check continuity between sunload sensor harness connector
M63 terminal 1 and 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness or connector.
MJIB0172E
MJIB0181E
1 - 29 : Continuity should exist.
2 - 37 : Continuity should exist.
1, 2 - Ground. : Continuity should not exist.
MJIB0086E

TROUBLE DIAGNOSIS
ATC-113
C
D
E
F
G
H
I
K
L
MA
B
AT C
2.CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector and sunload sensor con-
nector.
3. Check continuity between sunload sensor harness connector
M63 terminal 3 and front air control harness connector M60 ter-
minal 13.
4. Check continuity between sunload sensor harness connector
M63 terminal 3 and ground.
OK or NG
OK >> Replace sunload sensor.
NG >> Repair harness or connector.3 - 13 : Continuity should exist.
3 - Ground : Continuity should not exist.
MJIB0087E

ATC-114
TROUBLE DIAGNOSIS
Intake Sensor Circuit
EJS006BZ
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on the heater & cooling unit. It converts
temperature of air after it passes through the evaporator into a resis-
tance value which is then input to the front air control.
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted. (56 or 57 is indi-
cated on front air control as a result of conducting Self-diagnosis.)
1.CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND
1. Disconnect intake sensor connector.
2. Turn ignition switch ON.
3. Check voltage between intake sensor harness connector M82
terminal 2 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2.CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between intake sensor harness connector M82
terminal 1 and front air control harness connector M60 terminal
13.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
MJIB0173E
WJIA1156E
2 - Ground : Approx. 5V
WJIA1278E
1 - 13 : Continuity should exist.
WJIA1157E

TROUBLE DIAGNOSIS
ATC-115
C
D
E
F
G
H
I
K
L
MA
B
AT C
3.CHECK INTAKE SENSOR
Refer toAT C - 11 5 , "
Intake Sensor".
OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosisAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagno-
sis.
NG >> 1. Replace intake sensor.
2. Go to self-diagnosisAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagno-
sis.
4.CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND FRONT AIR CONTROL
1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between intake sensor harness connector M82
terminal 2 and front air control harness connector M60 terminal
12.
4. Check continuity between intake sensor harness connector M82
terminal 2 and ground.
OK or NG
OK >> 1. Replace front air control.
2. Go to self-diagnosisAT C - 5 5 , "
A/C System Self-diagnosis Function"and perform self-diagno-
sis.
NG >> Repair harness or connector.
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector, measure resistance
between sensor terminals 1 and 2, using the table below.
If NG, replace intake sensor.2 - 12 : Continuity should exist.
2 - Ground : Continuity should not exist.
WJIA1158E
Temperature°C(°F) Resistance kW
-15 (5) 209.8
-10 (14) 160.3
-5 (23) 123.4
0 (32) 95.8
5 (41) 74.9
10 (50) 59.0
15 (59) 46.8
20 (68) 37.4
25 (77) 30.0
30 (86) 24.2
35 (95) 19.7
40 (104) 16.1
45 (113) 13.2
MJIB0174E