2006 INFINITI QX56 Factory Service Manual

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Page 553 of 3383

INFINITI QX56 2006 Factory Service Manual ATC-152
IN-CABIN MICROFILTER
Revision: November 20092006 QX56
5. Install the in-cabin microfilter cover.
6. Install the lower glove box in the instrument panel and secure it
with the two hinge pins.
L

Page 554 of 3383

INFINITI QX56 2006 Factory Service Manual HEATER & COOLING UNIT ASSEMBLYATC-153
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Revision: November 2009 2006 QX56
HEATER & COOLING UNIT ASSEMBLYPFP:27110
ComponentsEJS003YE
Front Heater and Cooling Unit Assembly
WJ

Page 555 of 3383

INFINITI QX56 2006 Factory Service Manual ATC-154
HEATER & COOLING UNIT ASSEMBLY
Revision: November 20092006 QX56
Rear Heater and Cooling Unit Assembly
Removal and InstallationEJS003YF
FRONT HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Move th

Page 556 of 3383

INFINITI QX56 2006 Factory Service Manual HEATER & COOLING UNIT ASSEMBLYATC-155
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Revision: November 2009 2006 QX56
4. Drain the coolant from the engine cooling system. Refer to MA-13, "DRAINING ENGINE COOLANT" .
5.

HEATER & COOLING UNIT ASSEMBLYATC-155
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Revision: November 2009 2006 QX56
4. Drain the coolant from the engine cooling system. Refer to MA-13, "DRAINING 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-10, "
INSTRUMENT PANEL ASSEMBLY" .
8. Remove the steering column. Refer to PS-10, "
STEERING COLUMN" .
9. 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-4, "
POWER SUPPLY ROUTING CIRCUIT" .
10. Disconnect the steering member from each side of the vehicle body.
11. 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 trim panels when removing the front heater and
cooling unit assembly with it attached to the steering member.
12. 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
compressor 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 MA-14, "REFILLING ENGINE
COOLANT" .
Recharge the A/C system. Refer to ATC-171, "Evacuating System and Charging Refrigerant" .
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge the refrigerant from the A/C system. Refer to ATC-171, "Discharging Refrigerant" .
2. Drain the coolant from the engine cooling system. Refer to MA-13, "
DRAINING ENGINE COOLANT" .
3. Disconnect the rear heater core hoses from the rear heater core.
4. Disconnect the rear A/C pipes from the rear expansion valve.
5. Remove the luggage side finisher lower RH. Refer to EI-35,
"BODY SIDE TRIM" .
6. Disconnect the following electrical connectors:
Rear blower motor
Rear blower motor resistor
Rear air mix door motor
7. Disconnect the ducts 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
compressor 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 MA-14, "REFILLING ENGINE
COOLANT" .
Recharge the A/C system. Refer to ATC-171, "Evacuating System and Charging Refrigerant" .
LJIA0021E

Page 557 of 3383

INFINITI QX56 2006 Factory Service Manual ATC-156
HEATER CORE
Revision: November 20092006 QX56
HEATER COREPFP:27140
ComponentsEJS003YG
Front Heater and Cooling Unit Assembly
LJIA0138E
1. Heater core cover2. Heater core pipe bracket 3. Heater

Page 558 of 3383

INFINITI QX56 2006 Factory Service Manual HEATER COREATC-157
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Revision: November 2009 2006 QX56
Rear Heater and Cooling Unit Assembly
Removal and InstallationEJS003YH
FRONT HEATER CORE
Removal
1. Remove the front he

Page 559 of 3383

INFINITI QX56 2006 Factory Service Manual ATC-158
HEATER CORE
Revision: November 20092006 QX56
5. Remove the heater core.
NOTE:
If the in-cabin microfilters are contaminated from coolant leaking
from the heater core, replace the in-cabin micr

Page 560 of 3383

INFINITI QX56 2006 Factory Service Manual DEFROSTER DOOR MOTORATC-159
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Revision: November 2009 2006 QX56
DEFROSTER DOOR MOTORPFP:27733
Removal and InstallationEJS003YI
Defroster Door Motor - Front Heater and Cooling

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