2007 INFINITI QX56 sensor

ATC-122
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
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 in take sensor harness connector
M146 terminal 2 and front air control harness connector M49 ter-
minal 9.
4. Check continuity between in take sensor harness connector
M146 terminal 2 and ground.
OK or NG
OK >> 1. Replace front air control. Refer to ATC-123, "Removal and Installation".
2. Go to ATC-48, "
A/C System Self-Diagnosis Function" and perform self-diagnosis.
NG >> Repair harness or connector.
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector, measure resistance
between terminals 1 and 2 at sensor harness side, using the table
below.
If NG, replace intake sensor. 2 - 9 : Continuity should exist.
2 - Ground : Continuity should not exist.
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Temperature
°C ( °F) Resistance k Ω
− 15 (5) 209.0
− 10 (14) 160.0
− 5 (23) 123.0
0 (32) 95.8
5 (41) 74.9
10 (50) 58.9
15 (59) 46.7
20 (68) 37.3
25 (77) 30.0
30 (86) 24.2
35 (95) 19.7
40 (104) 16.1 45 (113) 13.2
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ATC-124
< SERVICE INFORMATION >
AMBIENT SENSOR
AMBIENT SENSOR
Removal and InstallationINFOID:0000000003533271
REMOVAL
1. Disconnect the ambient sensor electrical connector.NOTE:
The ambient sensor is located behind the front bumper, in front
of the condenser.
2. Release the ambient sensor clip and then remove the ambient sensor.
INSTALLATION
Installation is in the reverse order of removal.
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IN-VEHICLE SENSORATC-125
< SERVICE INFORMATION >
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IN-VEHICLE SENSOR
Removal and InstallationINFOID:0000000003533272
REMOVAL
1. Remove the cluster lid D. Refer to IP-10, "Removal and Installation".
2. Remove the two screws and remove the in-vehicle sensor from cluster lid D.
INSTALLATION
Installation is in the reverse order of removal.
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ATC-126
< SERVICE INFORMATION >
OPTICAL SENSOR
OPTICAL SENSOR
Removal and InstallationINFOID:0000000003533273
The optical sensor is located in the top center of the instrument
panel. Refer to LT-44, "
Optical Sensor".
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INTAKE SENSORATC-127
< SERVICE INFORMATION >
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INTAKE SENSOR
Removal and InstallationINFOID:0000000003533274
REMOVAL
1. Remove the glove box . Refer to IP-10, "Removal and Installation".
2. Disconnect the intake sensor electrical connector. NOTE:
The intake sensor is located on the top of the front heater and
cooling unit assembly next to the A/C evaporator cover.
3. Twist the intake sensor to remove the intake sensor from the front heater and cooling unit assembly.
INSTALLATION
Installation is in the reverse order of removal.
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ATC-152
< SERVICE INFORMATION >
REFRIGERANT LINES
Component
INFOID:0000000003533292
Front A/C Compressor and Condenser
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1. High-pressure service valve 2. Grommet 3. High-pressure pipe
4. Refrigerant pressure sensor 5. Condenser 6. Compressor shaft seal
7. High-pressure flexible hose 8. Low-pressure flexible hose 9. Low-pressure service valve
10. Low-pressure pipe 11. Expansion valve (front) 12. Drain hose

REFRIGERANT LINESATC-161
< SERVICE INFORMATION >
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5. Remove the front and rear bumper fascia. Refer to EI-12 (front), EI-14 (rear).
6. Reposition the front fender protector out of the way. Refer to EI-22
.
7. Disconnect the chassis harness connector.
8. Remove the spare wheel and tire.
9. Remove the tailpipe and tailpipe hanger bracket. Refer to EX-3, "
Removal and Installation".
10. Remove the seatbelt latch anchor. Refer to RSU-21, "
Component".
11. Remove the front floor heat shield.
12. Disconnect each end of the underfloor rear high- and low-pressure A/C and heater core pipes. Refer to
ATC-152, "
Component".
CAUTION:
Cap or wrap the joint of the pipes with suitable material such as viny l tape to avoid the entry of air.
13. Set two suitable jacks at the RH body mount points to support the vehicle body when it is separated from the RH side of the frame.
14. Remove the RH body mount bolts. Refer to BL-135, "
Body Mounting".
15. Use the vehicle hoist to lower the RH side of the frame from the RH side of the body [approximately 305
mm (12 in)] until there is sufficient clearance to remove the underfloor rear high- and low-pressure A/C
and heater core pipes from between the body and the frame.
16. Remove the underfloor rear high- and low-pressure A/ C and heater core pipes from the back of the vehi-
cle.
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-152, "
Component".
CAUTION:
• Replace the O-ring of the high/low-pressure pipe with a new one, then apply compressor oil to it
when installing it.
• After charging refrigerant, check for leaks.
Removal and Installation for Refrigerant Pressure SensorINFOID:0000000003533301
REMOVAL
1. Discharge the refrigerant. Refer to ATC-150, "HFC-134a (R-134a) Service Procedure".
2. Disconnect the refrigerant pressu re sensor electrical connector
and remove the refrigerant pressure sensor from the condenser.
CAUTION:
Be careful not to damage the condenser fins.
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-152, "
Component".
CAUTION:
• Be careful not to damage the condenser fins.
• Replace the O-ring of the refrig erant pressure sensor with a new one, then apply compressor oil to it
when installing it.
• After charging refrigerant, check for leaks.
Removal and Installation for CondenserINFOID:0000000003533302
REMOVAL
1. Discharge the refrigerant. Refer to .
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ATC-162
< SERVICE INFORMATION >
REFRIGERANT LINES
2. Remove the radiator. Refer to CO-13.
CAUTION:
Be careful not to damage the core su rface of the condenser and the radiator.
3. Disconnect the high-pressure flexible hose and the high-pressure pipe from the condenser.
CAUTION:
Cap or wrap the joint of the pipe with suitable ma terial such as vinyl tape to avoid the entry of air.
4. Disconnect the refrigerant pressure sensor connector. • Remove the refrigerant pressure sensor from the condenseras necessary.
5. Lift the condenser out of the mounting grommets to remove the condenser.
INSTALLATION
Installation is in the reverse order of removal.
Refer to ATC-152, "
Component".
CAUTION:
• Replace the O-rings of the high-p ressure pipe, refrigerant pressure sensor, and high-pressure flexi-
ble hose with new ones, then apply compr essor oil to them when installing them.
• After charging refrigerant, check for leaks.
• Replace the grommets as necessary.
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