2006 INFINITI FX35 sensor

ATC-112
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
Intake Sensor CircuitNJS000EI
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 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.
RJIA0928E
RJIA1458E
2 – Ground : Approx. 5 V
RJIA2031E
1 – 49 : Continuity should exist.
RJIA2032E

TROUBLE DIAGNOSIS ATC-113
C
D E
F
G H
I
K L
M A
B
AT C
Revision: 2006 December 2006 FX35/FX45
3. CHECK INTAKE SENSOR
Refer to AT C - 11 3 , "
Intake Sensor" .
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis AT C - 5 3 , "
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 3 , "
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 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 AT C - 5 3 , "
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 M254, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace intake sensor. 2 – 41 : Continuity should exist.
2 – Ground : Continuity should not exist.
RJIA2033E
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
RJIA2034E

ATC-116
AMBIENT SENSOR
Revision: 2006 December 2006 FX35/FX45
AMBIENT SENSORPFP:27722
Removal and InstallationNJS000EL
REMOVAL
1. Remove front grille. Refer to EI-22, "FRONT GRILLE" .
2. Disconnect ambient sensor connector, and then remove ambi- ent sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2016E

IN-VEHICLE SENSOR ATC-117
C
D E
F
G H
I
K L
M A
B
AT C
Revision: 2006 December 2006 FX35/FX45
IN-VEHICLE SENSORPFP:27720
Removal and InstallationNJS000EM
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.
RJIA2036E

ATC-118
SUNLOAD SENSOR
Revision: 2006 December 2006 FX35/FX45
SUNLOAD SENSORPFP:27721
Removal and InstallationNJS000EN
REMOVAL
1. Remove front defroster grille (RH). Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Disconnect sunload sensor connector, and then remove the sunload sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2026E

INTAKE SENSOR ATC-119
C
D E
F
G H
I
K L
M A
B
AT C
Revision: 2006 December 2006 FX35/FX45
INTAKE SENSORPFP:27723
Removal and InstallationNJS000EO
REMOVAL
1. Remove low-pressure pipe 2 and high-pressure pipe 3. Refer to ATC-150, "Removal and Installation of
Low-pressure Pipe 2 and High-pressure Pipe 3" .
CAUTION:
Cap or wrap the joint of the pipe 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 A/C piping 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.
RJIA0928E

ATC-128
HEATER & COOLING UNIT ASSEMBLY
Revision: 2006 December 2006 FX35/FX45
Disassembly and AssemblyNJS000EV
1. Heater pipe grommet 2. Heater core 3. Heater pipe cover
4. Aspirator 5. Aspirator hose 6. Air mix door motor (driver side)
7. Air mix door (slide door) 8. Max. cool door link 9. Max. cool door lever
10. Ventilator door lever 11. Ventilator door link 12. Air mix door motor (passenger side)
13. Intake sensor bracket 14. Intake sensor 15. Foot duct (right)
16. Evaporator cover 17. Evaporator cover adaptor 18. Heater pipe bracket
SJIA1645E

ATC-154
REFRIGERANT LINES
Revision: 2006 December 2006 FX35/FX45
8. Remove condenser mounting bolts.
9. Remove radiator upper mount, move radiator and condenser to the engine side.
10. Remove condenser. CAUTION:
Be careful not to damage the core surface of the condenser and the radiator.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of A/C piping with new ones, and then apply compressor oil to it when installing
it.

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.
Removal and Installation of Refrigerant Pressure SensorNJS000FB
REMOVAL
1. Remove condenser. Refer to ATC-153, "Removal and Installation of Condenser" .
2. Remove refrigerant pressure sensor from condenser. CAUTION:
When working, be careful not to damage the condenser.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
Apply compressor oil to O-ring of refrigerant pressure sensor when installing it.
Removal and Installation of EvaporatorNJS000FC
REMOVAL
1. Remove low-pressure pipe 2 and high-pressure pipe 3. Refer to ATC-150, "Removal and Installation of
Low-pressure Pipe 2 and High-pressure Pipe 3" .
SJIA1570E
High- pressure flexible hose bracket mounting bolt
: 5.5 N·m (0.56 kg-m, 49 in-lb)
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