INFINITI QX56 2010 Factory Service Manual

IN-VEHICLE SENSORVTL-9
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IN-VEHICLE SENSOR
Removal and InstallationINFOID:0000000005147606
REMOVAL
1. Remove the lower instrument panel LH. Refer to IP-11, "Exploded View".
2. Remove the two screws (A) and remove the in-vehicle sensor (1).
INSTALLATION
Installation is in the reverse order of removal.
ALIIA0060ZZ
Revision: April 20092010 QX56

VTL-10
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OPTICAL SENSOR
OPTICAL SENSOR
Removal and InstallationINFOID:0000000005147607
REMOVAL
1. Remove the defroster grille from the instrument panel. Refer to VTL-36, "Removal and Installation".
2. Disconnect the optical sensor connector (2).
3. Twist the optical sensor (1) counter clockwise to remove it from the defroster grille.
INSTALLATION
Installation is in the reverse order of removal.
ALIIA0061ZZ
Revision: April 20092010 QX56

INTAKE SENSORVTL-11
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INTAKE SENSOR
Removal and InstallationINFOID:0000000005147608
REMOVAL
1. Remove the instrument lower panel RH and glove box. Refer to IP-17, "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. Pull up on 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.
LJIA0133E
Revision: April 20092010 QX56

VTL-12
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BLOWER MOTOR
BLOWER MOTOR
ComponentINFOID:0000000005147609
Front Blower MotorRear Blower Motor
Removal and InstallationINFOID:0000000005147610
FRONT BLOWER MOTOR
Removal
1. Remove the glove box assembly. Refer to IP-17, "Removal and Installation".
2. Disconnect the front blower motor electrical connector.
3. Remove the three screws and remove the front blower motor.
4. Remove the blower motor wheel as necessary to transfer to the new blower motor.
Installation
Installation is in the reverse order of removal.
LJIA0136E
1. Front heater and cooling unit assembly 2. Front blower motor 3. Front variable blower control
AWIIA0085ZZ
1. Rear blower motor2. Rear heater and cooling unit assembly 3. Rear variable blower control
Revision: April 20092010 QX56

BLOWER MOTORVTL-13
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REAR BLOWER MOTOR
Removal
1. Remove the rear heater and cooling unit assembly. Refer to VTL-17, "Removal and Installation".
2. Disconnect the rear blower motor electrical connector.
3. Remove the three screws and remove the rear blower motor.
4. Remove the blower motor wheel as necessary to transfer to the new blower motor.
Installation
Installation is in the reverse order of removal.
Revision: April 20092010 QX56

VTL-14
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VARIABLE BLOWER CONTROL
VARIABLE BLOWER CONTROL
ComponentsINFOID:0000000005147622
Front Variable Blower Control - Front Heater and Cooling Unit Assembly
LJIA0139E
1. Front heater and cooling unit assembly 2. Intake door motor3. Air mix door motor (driver)
4. Variable blower control 5. Air mix door motor (passenger) 6. Mode door motor
7. Defroster door motor
Revision: April 20092010 QX56

VARIABLE BLOWER CONTROLVTL-15
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Rear Variable Blower Control - Rear Heater and Cooling Unit Assembly
Removal and InstallationINFOID:0000000005147623
FRONT VARIABLE BLOWER CONTROL
Removal
1. Remove the glove box assembly. Refer to IP-17, "Removal and Installation".
2. Disconnect the variable blower control electrical connector.
3. Remove the two screws and remove the variable blower control.
Installation
Installation is in the reverse order of removal.
REAR VARIABLE BLOWER CONTROL
Removal
1. Remove the luggage side finisher lower RH. Refer to INT-19, "Removal and Installation".
2. Disconnect the rear blower motor resistor electrical connector.
3. Remove the two screws and remove the rear blower motor resistor.
Installation
Installation is in the reverse order of removal.
ALIIA0066ZZ
1. Air mix door motor 2. Heater core 3. Blower motor
4. Variable blower control 5. Rear heater and cooling unit assembly Front
Revision: April 20092010 QX56

VTL-16
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HEATER & COOLING UNIT ASSEMBLY
HEATER & COOLING UNIT ASSEMBLY
ComponentINFOID:0000000005147612
Front A/C System
WJIA1578E
1. High-pressure service valve 2. Grommet3. High-pressure pipe
4. Refrigerant pressure sensor 5. Condenser 6. Compressor shaft seal
Revision: April 20092010 QX56

HEATER & COOLING UNIT ASSEMBLYVTL-17
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Rear A/C System
NOTE:
Refer to HA-5, "
Precaution for Refrigerant Connection".
Removal and InstallationINFOID:0000000005147613
FRONT HEATER AND COOLING UNIT ASSEMBLY
Removal
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
AWIIA0134GB
1. Rear heater and cooling unit assembly 2. Rear A/C pipes 3. Rear A/C heater core pipes
4. Rear heater core hose 5. Rear blower motor6. Underfloor rear A/C pipes
7. Underfloor rear heater core pipes A. Bolt torque specification B. Leak checking order (l - r)
C. Tightening torque D. Wrench sizeE. O-ring size
Front
NOTE: The O-ring size 8 is the high-side and the O-ring size 16 is the low-side.
Revision: April 20092010 QX56

VTL-18
< ON-VEHICLE REPAIR >
HEATER & COOLING UNIT ASSEMBLY
1. Move the two front seats to the rear most position on the seat track.
2. Disconnect the battery negative terminal and battery positive terminal.
3. Discharge the refrigerant from the A/C system. Refer to HA-20, "
HFC-134a (R-134a) Service Procedure".
4. Drain the coolant from the engine cooling system. Refer to CO-11, "
Changing Engine Coolant".
5. Disconnect the front heater hoses from the front heater core.
6. Disconnect the high/low pressure pipes from the front expansion valve.
7. Remove the instrument panel and console panel. Refer to IP-12, "
Removal and Installation".
8. Disconnect the instrument panel wire harness at the RH and LH in-line connector brackets, and the fuse block (J/B) electrical connectors. Refer to PG-9, "
Wiring Diagram — Battery Power Supply —".
9. Disconnect the steering member from each side of the vehicle body.
10. Remove the front heater and cooling unit assembly with it attached to the steering member, from the vehi-
cle.
CAUTION:
Use care not to damage the seats and interior tr im panels when removing the front heater and
cooling unit assembly with it at tached to the steering member.
11. Remove the front heater and cooling unit assembly from the steering member.
Installation
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply com-
pressor oil to it when installing it.
• After charging the refrigerant, check for leaks.
NOTE:
• Fill the engine cooling system with the specified coolant mixture. Refer to CO-11, "
Changing Engine Cool-
ant".
• Recharge the A/C system. Refer to HA-20, "
HFC-134a (R-134a) Service Procedure".
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge the refrigerant from the A/C system. Refer to HA-20, "HFC-134a (R-134a) Service Procedure".
2. Drain the coolant from the engine cooling system. Refer to CO-11, "
Changing Engine Coolant".
3. Remove the luggage side finisher lower and upper RH. Refer to INT-19, "
Removal and Installation".
4. Disconnect the rear heater core hoses from the rear heater core.
5. Disconnect the rear A/C pipes from the rear expansion valve.
6. Disconnect the following electrical connectors: • Rear blower motor
• Rear variable blower control
• Rear air mix door motor
• Rear mode door motor
7. Disconnect the ducts and drain tube from the rear heater and cooling unit assembly.
8. Remove the rear heater and cooling unit assembly.
Installation
Installation is in the reverse order of removal.
CAUTION:
• Replace the O-ring of the low-pressure pipe and high-pressure pipe with a new one, and apply com-
pressor oil to it when installing it.
• After charging the refrigerant, check for leaks.
NOTE:
• Fill the engine cooling system with the specified coolant mixture. Refer to CO-11, "
Changing Engine Cool-
ant".
• Recharge the A/C system. Refer to HA-20, "
HFC-134a (R-134a) Service Procedure".
Revision: April 20092010 QX56