INFINITI M35 2007 Factory Service Manual

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.
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SHA930E

TROUBLE DIAGNOSIS
ATC-121
C
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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.
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1 – Ground : Approx. 5 V
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2 – 59 : Continuity should exist.
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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.
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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
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CONTROLLER
ATC-123
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AT C
Revision: 2007 April2007 M35/M45
CONTROLLERPFP:27500
Removal and Installation of Multifunction SwitchNJS000H4
REMOVAL
Refer to AV- 2 8 4 , "Multifunction Switch" .
INSTALLATION
Installation is basically the reverse order of removal.

ATC-124
AUTO AMP
Revision: 2007 April2007 M35/M45
AUTO AMPPFP:27760
Removal and Installation of Unified Meter and A/C Auto Amp.NJS000H5
REMOVAL
1. Remove audio unit. Refer to AV- 1 2 6 , "Audio Unit" (Without mobile entertainment system) or AV- 2 7 7 ,
"Audio Unit" (With mobile entertainment system).
2. Remove mounting screws, and then remove unified meter and
A/C amp.
INSTALLATION
Installation is basically the reverse order of removal.
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AMBIENT SENSOR
ATC-125
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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.
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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.
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SUNLOAD SENSOR
ATC-127
C
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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.
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ATC-128
INTAKE SENSOR
Revision: 2007 April2007 M35/M45
INTAKE SENSORPFP:27723
Removal and InstallationNJS000H9
REMOVAL
1. Remove low-pressure pipe 1 and high-pressure pipe 2. Refer to ATC-161, "Removal and Installation of
Low-pressure Pipe 1 and High-pressure Pipe 2" .
CAUTION:
Cap or wrap the joint of evaporator, low-pressure flexible hose and high-pressure pipe 1 with suit-
able material such as vinyl tape to avoid the entry of air.
2. Slide evaporator to passenger side, and then remove intake
sensor.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of low-pressure flexible hose, low-pressure pipe 1 and high-pressure pipe 1, 2
with new ones, and then apply compressor oil to it when installing it.

Mark the mounting position of intake sensor bracket prior to removal so that the reinstalled sen-
sor can be located in the same position.

Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping
straight in axial direction.

Insert piping securely until a click is heard.

After piping connection is completed, pull male-side piping by hand to make sure that connection
does not come loose.

When recharging refrigerant, check for leaks.
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BLOWER UNIT
ATC-129
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AT C
Revision: 2007 April2007 M35/M45
BLOWER UNITPFP:27200
Removal and InstallationNJS000IA
REMOVAL
1. Remove instrument passenger lower cover and glove box cover. Refer to IP-10, "INSTRUMENT PANEL
ASSEMBLY" .
2. Remove BCM. Refer to BCS-15, "
Removal and Installation of BCM" .
3. Remove mounting nuts, and then remove ECM with bracket
attached.
4. Disconnect intake door motor connector and blower fan motor
connector.
5. Remove mounting bolt and screw from blower unit.
CAUTION:
Move blower unit rightward, and remove locating pin (1
part) and joint. Then remove blower unit downward.
6. Remove blower unit.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
Make sure locating pin (1 part) and joint are securely inserted.
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