service INFINITI FX35 2008 Service Manual

TROUBLE DIAGNOSISATC-93
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3. Check continuity between sunload sensor harness connector M87 terminal 1 and unified meter and A/C amp. harness con-
nector M57 terminal 50.
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 ATC-43, "
Self-Diagnosis Function" and perform self-diagnosis STEP-2.
Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.
COMPONENT INSPECTION
Sunload Sensor
Measure voltage between unified meter and A/C amp. harness con-
nector M57 terminal 50 and ground. 1 – 50 : Continuity should exist.
1 – Ground : Continuity should not exist.
RJIA2029E
RJIA2030E
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ATC-94
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TROUBLE DIAGNOSIS
 When checking sunload sensor, select a place where sunshine directly on it.
If NG, replace sunload sensor.
Intake Sensor CircuitINFOID:0000000001328199
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on t he 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 IN TAKE SENSOR AND GROUND
1. Disconnect intake sensor connector.
2. Turn ignition switch ON.
SHA930E
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TROUBLE DIAGNOSISATC-95
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3. Check voltage between intake sensor harness connector M254 terminal 2 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 M254 terminal 1 and unified meter and A/C amp. harness con-
nector M57 terminal 49.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3.CHECK INTAKE SENSOR
Refer to "Intake Sensor".
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-43, "
Self-Diagnosis Function" and perform self-diagnosis STEP-2.
Confirm that code No. 20 is displayed.
NG >> 1. Replace intake sensor. 2. Go to self-diagnosis ATC-43, "
Self-Diagnosis Function" 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 M254 terminal 2 and unified meter and A/C amp. harness con-
nector M57 terminal 41.
4. Check continuity between intake sensor harness connector M254 terminal 2 and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis ATC-43, "
Self-Diagnosis Function" and perform self-diagnosis STEP-2.
Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.
COMPONENT INSPECTION
Intake Sensor
2 – Ground : Approx. 5 V
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1 – 49 : Continuity should exist.
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2 – 41 : Continuity should exist.
2 – Ground : Continuity should not exist.
RJIA2033E
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ATC-96
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TROUBLE DIAGNOSIS
After disconnecting intake sensor connector M254, measure resis-
tance between terminals 1 and 2 at sensor side. Refer to the table
below.
If NG, replace intake sensor.
Temperature °C ( °F) Resistance k Ω
− 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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CONTROLLERATC-97
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CONTROLLER
Removal and Installation of A/C and AV SwitchINFOID:0000000001328200
REMOVAL
Refer to AV-42, "Removal and Installation for A/C and AV Switch".
INSTALLATION
Installation is basically the reverse order of removal.
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ATC-98
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AUTO AMP
AUTO AMP
Removal and Installation of Unified Meter and A/C AmpINFOID:0000000001328201
REMOVAL
1. Remove audio unit. Refer to AV-41, "Removal and Installation of Audio Unit".
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 SENSORATC-99
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AMBIENT SENSOR
Removal and InstallationINFOID:0000000001328202
REMOVAL
1. Remove front grille. Refer to EI-22.
2. Disconnect ambient sensor c onnector, and then remove ambi-
ent sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2016E
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ATC-100
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IN-VEHICLE SENSOR
IN-VEHICLE SENSOR
Removal and InstallationINFOID:0000000001328203
REMOVAL
1. Remove instrument driver lower panel. Refer to IP-10.
2. Remove mounting screw, and then remove in-vehicle sensor.
INSTALLATION
Installation is basically the reverse order of removal.
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SUNLOAD SENSORATC-101
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SUNLOAD SENSOR
Removal and InstallationINFOID:0000000001328204
REMOVAL
1. Remove front defroster grille (RH). Refer to IP-10.
2. Disconnect sunload sensor connector, and then remove the sunload sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2026E
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ATC-102
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INTAKE SENSOR
INTAKE SENSOR
Removal and InstallationINFOID:0000000001328205
REMOVAL
1. Remove low-pressure pipe 2 and high-pressure pipe 3. Refer to ATC-133, "Removal and Installation of
Low-Pressure Pipe 2 and High-pressure Pipe 3".
CAUTION:
Cap or wrap the joint of evaporator, low-pressure pipe 1 and high-pressure pipe 2 with suitable
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 pipe 1, 2 and high-p ressure pipe 2, 3 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 sensor
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 comp leted, 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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