2007 INFINITI M35 sensor

ATC-118
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
Sunload Sensor CircuitNJS000H2
COMPONENT DESCRIPTION
Sunload Sensor
The sunload sensor is located on the driver’s side front 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 unified meter and A/C amp.
SUNLOAD INPUT PROCESS
The unified meter and A/C amp. also includes a processing circuit which averages the variations in detected
sunload over a period of time. This prevents drastic swings 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 sunload 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.
DIAGNOSIS PROCEDURE FOR SUNLOAD SENSOR
SYMPTOM: Sunload sensor circuit is open or shorted. (25 or −25 is
indicated on unified meter and A/C amp. as a result of performing
self-diagnosis STEP-2.)
1. CHECK VOLTAGE BETWEEN SUNLOAD SENSOR AND GROUND
1. Disconnect sunload sensor connector.
2. Turn ignition switch ON.
3. Check voltage between sunload sensor harness connector M87
terminal 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
RJIA4098E
RJIA4099E
1 – Ground : Approx. 5 V
RJIA2027E

TROUBLE DIAGNOSIS
ATC-119
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2007 April2007 M35/M45
2. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between sunload sensor harness connector
M87 terminal 2 and unified meter and A/C amp. harness con-
nector M65 terminal 62.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK SUNLOAD SENSOR
1. Reconnect sunload sensor connector and unified meter and A/C amp. connector.
2. Refer to ATC-120, "
Sunload Sensor" .
OK or NG
OK >> 1. Replace unified meter and A/C amp.
2. Go to self-diagnosis AT C - 5 7 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace sunload sensor.
2. Go to self-diagnosis AT C - 5 7 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between sunload sensor harness connector
M87 terminal 1 and unified meter and A/C amp. harness con-
nector M65 terminal 46.
4. Check continuity between sunload sensor harness connector
M87 terminal 1 and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp.
2. Go to self-diagnosis AT C - 5 7 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.2 – 62 : Continuity should exist.
RJIA4100E
1 – 46 : Continuity should exist.
1 – Ground : Continuity should not exist.
RJIA4101E

ATC-120
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
COMPONENT INSPECTION
Sunload Sensor
Measure voltage between unified meter and A/C amp. harness con-
nector M65 terminal 46 and ground.

When checking sunload sensor, select a place where sunshine directly on it.
If NG, replace sunload sensor.
RJIA4102E
SHA930E

TROUBLE DIAGNOSIS
ATC-121
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2007 April2007 M35/M45
Intake Sensor CircuitNJS000H3
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on the heater & cooling unit assembly. It
converts temperature of air after it passes through the evaporator
into a resistance value which is then input to the unified meter and A/
C amp.
DIAGNOSIS PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted. (24 or −24 is
indicated on unified meter and A/C amp. as a result of performing
self-diagnosis STEP-2.)
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 1 and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector M82
terminal 2 and unified meter and A/C amp. harness connector
M65 terminal 59.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
RJIA4103E
RJIA4104E
1 – Ground : Approx. 5 V
RJIA4215E
2 – 59 : Continuity should exist.
RJIA4106E

ATC-122
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
3. CHECK INTAKE SENSOR
Refer to ATC-122, "
Intake Sensor" .
OK or NG
OK >> 1. Replace unified meter and A/C amp.
2. Go to self-diagnosis AT C - 5 7 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace intake sensor.
2. Go to self-diagnosis AT C - 5 7 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector M82
terminal 1 and unified meter and A/C amp. harness connector
M65 terminal 43.
4. Check continuity between intake sensor harness connector M82
terminal 1 and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp.
2. Go to self-diagnosis AT C - 5 7 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector M82, measure resis-
tance between terminals 1 and 2 at sensor side. Refer to the table
below.
If NG, replace intake sensor.1 – 43 : Continuity should exist.
1 – Ground : Continuity should not exist.
RJIA4105E
Temperature °C (°F) Resistance kΩ
−15 (5) 12.34
−10 (14) 9.62
−5 (23) 7.56
0 (32) 6.00
5 (41) 4.80
10 (50) 3.87
15 (59) 3.15
20 (68) 2.57
25 (77) 2.12
30 (86) 1.76
35 (95) 1.47
40 (104) 1.23
45 (113) 1.04
RJIA4107E

AMBIENT SENSOR
ATC-125
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2007 April2007 M35/M45
AMBIENT SENSORPFP:27722
Removal and InstallationNJS000H6
REMOVAL
1. Remove front grille. Refer to EI-16, "FRONT GRILLE" .
2. Disconnect ambient sensor connector, and then remove ambi-
ent sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA4087E

ATC-126
IN-VEHICLE SENSOR
Revision: 2007 April2007 M35/M45
IN-VEHICLE SENSORPFP:27720
Removal and InstallationNJS000H7
REMOVAL
1. Remove instrument driver lower panel. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Remove mounting screw, and then remove in-vehicle sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA4109E

SUNLOAD SENSOR
ATC-127
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2007 April2007 M35/M45
SUNLOAD SENSORPFP:27721
Removal and InstallationNJS000H8
REMOVAL
1. Remove front defroster grille (left). Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Disconnect sunload sensor connector, and then remove sunload
sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA4110E