2004 INFINITI QX56 Factory Service Manual

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Page 545 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-140
BLOWER MOTOR
Revision: August 20072004 QX56
BLOWER MOTORPFP:27226
ComponentsEJS002D1
Front Blower Motor
Rear Blower Motor
Removal and InstallationEJS002D2
FRONT BLOWER MOTOR
Removal
1. Remove

Page 546 of 3371

INFINITI QX56 2004 Factory Service Manual BLOWER MOTOR
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REAR BLOWER MOTOR
Removal
1. Remove the rear RH interior trim panel. Refer to EI-35, "CENTER PILLAR LOWER FINISHER" .
2

Page 547 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-142
IN-CABIN MICROFILTER
Revision: August 20072004 QX56
IN-CABIN MICROFILTERPFP:27277
Removal and InstallationEJS002D3
FUNCTION
The air inside the passenger compartment is filtered by the in-cabin

Page 548 of 3371

INFINITI QX56 2004 Factory Service Manual IN-CABIN MICROFILTER
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Revision: August 20072004 QX56
5. Install the in-cabin microfilter cover.
6. Install the lower glove box in the instrument panel and secure it

Page 549 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-144
HEATER & COOLING UNIT ASSEMBLY
Revision: August 20072004 QX56
HEATER & COOLING UNIT ASSEMBLYPFP:27110
ComponentsEJS002D4
Front Heater and Cooling Unit Assembly
WJIA0957E
1. High-pressure A/C p

Page 550 of 3371

INFINITI QX56 2004 Factory Service Manual HEATER & COOLING UNIT ASSEMBLY
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Rear A/C
Removal and InstallationEJS002D5
FRONT HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge

Page 551 of 3371

INFINITI QX56 2004 Factory Service Manual ATC-146
HEATER & COOLING UNIT ASSEMBLY
Revision: August 20072004 QX56
4. Remove the exhaust system. Refer to EX-3, "Removal and Installation" .
5. Disconnect the front heater hoses from the front hea

ATC-146
HEATER & COOLING UNIT ASSEMBLY
Revision: August 20072004 QX56
4. Remove the exhaust system. Refer to EX-3, "Removal and Installation" .
5. Disconnect the front heater hoses from the front heater core.
6. Disconnect the high/low pressure pipes from the front expansion valve.
7. Move the two front seats to the rearmost position on the seat track.
8. Remove the instrument panel and console panel. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
9. Remove the steering column. Refer to PS-10, "
Removal and Installation" .
10. 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-40, "
Harness Layout" .
11. Disconnect the steering member from each side of the vehicle body.
12. 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.
13. 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-13, "REFILLING ENGINE
COOLANT" .
Recharge the A/C system. Refer to ATC-162, "Evacuating System and Charging Refrigerant" .
REAR HEATER AND COOLING UNIT ASSEMBLY
Removal
1. Discharge the refrigerant from the A/C system. Refer to ATC-162, "Discharging Refrigerant" .
2. Drain the coolant from the engine cooling system. Refer to MA-12, "
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 rear RH interior trim panel. Refer to EI-34,
"Removal and Installation" .
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-13, "REFILLING ENGINE
COOLANT" .
Recharge the A/C system. Refer to ATC-162, "Evacuating System and Charging Refrigerant" .
LJIA0021E

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INFINITI QX56 2004 Factory Service Manual HEATER CORE
ATC-147
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Revision: August 20072004 QX56
HEATER COREPFP:27140
ComponentsEJS002D6
Front Heater and Cooling Unit Assembly
LJIA0138E
1. Heater core cover 2. Heater c

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