2005 INFINITI QX4 heater

HEATER CORE
ATC-161
C
D
E
F
G
H
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K
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MA
B
AT C
Revision: October 20052005 QX56
Rear Heater and Cooling Unit Assembly
Removal and InstallationEJS003YH
FRONT HEATER CORE
Removal
1. Remove the front heater and cooling unit assembly. Refer to ATC-157, "FRONT HEATER AND COOLING
UNIT ASSEMBLY" .
2. Remove the four screws and remove the upper bracket.
3. Remove the four screws and remove the heater core cover.
4. Remove the heater core pipe bracket.
LJIA0135E
1. Front cover 2. Evaporator and heater core case 3. Evaporator
4. Side cover 5. Heater core 6. Blower motor
7. Blower motor case 8. Blower motor resistor

ATC-162
HEATER CORE
Revision: October 20052005 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 microfilters with new
ones before installing the new heater core.
Installation
Installation is in the reverse order of removal.
REAR HEATER CORE
Removal
1. Partially drain the engine cooling system. Refer to MA-13, "DRAINING ENGINE COOLANT" .
2. Remove the rear RH interior trim panel. Refer to EI-35, "
BODY SIDE TRIM" .
3. Disconnect the rear heater hoses from the heater core.
4. Remove the rear heater core bracket.
5. Remove the heater core.
Installation
Installation is in the reverse order of removal.
LJIA0134E
LJIA0069E
LJIA0071E

DEFROSTER DOOR MOTOR
ATC-163
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: October 20052005 QX56
DEFROSTER DOOR MOTORPFP:27733
Removal and InstallationEJS003YI
Defroster Door Motor - Front Heater and Cooling Unit Assembly
REMOVAL
1. Remove the BCM. Refer to BCS-20, "Removal and Installation of BCM" .
2. Remove the Bose speaker amplifier if equipped. Refer to AV- 4 6 , "
Removal and Installation of BOSE
Speaker Amp." .
3. Disconnect the defroster door motor electrical connector.
4. Remove the three screws and remove the defroster door motor.
INSTALLATION
Installation is in the reverse order of removal.
LJIA0139E
1. Front heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (passenger)
4. Variable blower control 5. Air mix door motor (driver) 6. Mode door motor
7. Defroster door motor

ATC-164
INTAKE DOOR MOTOR
Revision: October 20052005 QX56
INTAKE DOOR MOTORPFP:27730
Removal and InstallationEJS003YJ
Intake Door Motor - Front Heater and Cooling Unit Assembly
REMOVAL
1. Remove the front heater and cooling unit assembly. Refer to ATC-157, "FRONT HEATER AND COOLING
UNIT ASSEMBLY" .
2. Remove the steering member from the front heater and cooling unit assembly.
3. Disconnect the intake door motor electrical connector.
4. Remove the three screws and remove the intake door motor.
INSTALLATION
Installation is in the reverse order of removal.
LJIA0139E
1. Front heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (passenger)
4. Variable blower control 5. Air mix door motor (driver) 6. Mode door motor
7. Defroster door motor

MODE DOOR MOTOR
ATC-165
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: October 20052005 QX56
MODE DOOR MOTORPFP:27731
Removal and InstallationEJS003YK
Mode Door Motor - Front Heater and Cooling Unit Assembly
REMOVAL
1. Remove the center console lower cover LH. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY"
2. Disconnect the mode door motor electrical connector.
3. Remove the two screws and remove the mode door motor.
INSTALLATION
Installation is in the reverse order of removal.
LJIA0139E
1. Front heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (passenger)
4. Variable blower control 5. Air mix door motor (driver) 6. Mode door motor
7. Defroster door motor

ATC-166
AIR MIX DOOR MOTOR
Revision: October 20052005 QX56
AIR MIX DOOR MOTOR PFP:27732
ComponentsEJS003YL
Air Mix Door Motors - Front Heater and Cooling Unit Assembly
Removal and InstallationEJS003YM
FRONT AIR MIX DOOR MOTOR (DRIVER)
Removal
1. Remove the center console lower cover LH. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Disconnect the air mix door motor electrical connector.
3. Remove the three screws and remove the air mix door motor.
Installation
Installation is in the reverse order of removal.
LJIA0139E
1. Front heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (passenger)
4. Variable blower control 5. Air mix door motor (driver) 6. Mode door motor
7. Defroster door motor

AIR MIX DOOR MOTOR
ATC-167
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: October 20052005 QX56
FRONT AIR MIX DOOR MOTOR (PASSENGER)
Removal
1. Remove the front heater and cooling unit assembly. Refer to ATC-157, "FRONT HEATER AND COOLING
UNIT ASSEMBLY" .
2. Remove the steering member from the front heater and cooling unit assembly.
3. Disconnect the air mix door motor electrical connector.
4. Remove the three screws and remove the air mix door motor.
Installation
Installation is in the reverse order of removal.
REAR AIR MIX DOOR MOTOR
Removal
1. Remove the RH rear interior trim panel. Refer to EI-35, "BODY SIDE TRIM" .
2. Disconnect the rear air mix door motor electrical connector.
3. Remove the three screws and remove the rear air mix door
motor.
Installation
Installation is in the reverse order of removal.
LJIA0021E

ATC-168
VARIABLE BLOWER CONTROL
Revision: October 20052005 QX56
VARIABLE BLOWER CONTROLPFP:27200
Removal and InstallationEJS003YN
Variable Blower Control - Front Heater and Cooling Unit Assembly
REMOVAL
1. Remove the glove box assembly. Refer to IP-14, "Instrument Lower Cover RH and Glove Box" .
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.
LJIA0139E
1. Front heater and cooling unit assembly 2. Intake door motor 3. Air mix door motor (passenger)
4. Variable blower control 5. Air mix door motor (driver) 6. Mode door motor
7. Defroster door motor