INFINITI FX35 2007 Service Manual

HEATER & COOLING UNIT ASSEMBLY ATC-125
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Revision: 2006 July 2007 FX35/FX45
HEATER & COOLING UNIT ASSEMBLYPFP:27110
Removal and InstallationNJS000EU
REMOVAL
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
2. Drain coolant from cooling system. Refer to CO-11, "
Changing Engine Coolant" (VQ35DE) or CO-38,
"Changing Engine Coolant" (VK45DE).
3. Remove cowl top cover. Refer to EI-23, "
COWL TOP" .
4. Remove high-pressure pipe 2 mounting clip.
5. Remove low-pressure flexible hose bracket mounting bolt. Refer to ATC-146, "
Removal and Installation of
Low-pressure Flexible Hose" .
6. Disconnect low-pressure pipe 1 and high-pressure pipe 2 from evaporator.
a. Set a disconnector [high-pressure side (SST: 9253089908), low- pressure side (SST: 9253089916)] on A/C piping.
b. Slide a disconnector toward vehicle front until it clicks.
c. Slide A/C piping toward vehicle front and disconnect it.
CAUTION:
Cap or wrap the joint of low-pressure pipe 1, 2 and high-
pressure pipe 2, 3 with suitable material such as vinyl tape
to avoid the entry of air.
7. Remove electric throttle control actuator (VQ35DE). Refer to EM-19, "
INTAKE MANIFOLD COLLECTOR" .
8. Disconnect two heater hoses from heater core.
9. Remove instrument panel and pad. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
10. Remove blower unit. Refer to ATC-120, "
BLOWER UNIT" .
RJIA2037E
RJIA2077E
RJIA2041E

ATC-126
HEATER & COOLING UNIT ASSEMBLY
Revision: 2006 July 2007 FX35/FX45
11. Remove mounting nuts and bolts, and then remove instrument stays (left and right side).
12. Remove mounting bolts from heater & cooling unit assembly.
13. Disconnect drain hose.
14. Remove center and side ventilator ducts, defroster nozzle and side defroster ducts. Refer to ATC-134,
"Removal of Defroster Nozzle, Ducts and Ventilator Ducts" .
15. Remove steering column mounting bolts and nut.
16. Remove steering member mounting bolts, nut and harness clips.
17. Remove steering member, and then remove heater & cooling unit assembly.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings of low-pressure pipe 1 and high-pressure pipe 2 with new ones, and then apply
compressor oil to it when installing it.

Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping
straight in axial direction.
RJIA2042E
SJIA1223E
SJIA1656E

HEATER & COOLING UNIT ASSEMBLY ATC-127
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Revision: 2006 July 2007 FX35/FX45

Insert piping securely until a click is heard.

After piping connection is completed, pull male-side piping by hand to make sure that connection
does not come loose.

When recharging refrigerant, check for leaks.
NOTE:

When filling radiator with coolant, refer to CO-11, "Changing Engine Coolant" (VQ35DE) or CO-38,
"Changing Engine Coolant" (VK45DE).

Recharge the refrigerant.
Heater & cooling unit assembly mounting bolt : 6.8 N·m (0.69 kg-m, 60 in-lb)
Steering member mounting nut and bolt : 12 N·m (1.2 kg-m, 9 fl-lb)
Steering column mounting nut and bolt : 16.7 N·m (1.7 kg-m, 12 fl-lb)

ATC-128
HEATER & COOLING UNIT ASSEMBLY
Revision: 2006 July 2007 FX35/FX45
Disassembly and AssemblyNJS000EV
1. Heater pipe grommet 2. Heater core 3. Heater pipe cover
4. Aspirator 5. Aspirator hose 6. Air mix door motor (driver side)
7. Air mix door (slide door) 8. Max. cool door link 9. Max. cool door lever
10. Ventilator door lever 11. Ventilator door link 12. Air mix door motor (passenger side)
13. Intake sensor bracket 14. Intake sensor 15. Foot duct (right)
16. Evaporator cover 17. Evaporator cover adaptor 18. Heater pipe bracket
PJIA0157E

HEATER & COOLING UNIT ASSEMBLY ATC-129
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Revision: 2006 July 2007 FX35/FX45
19. Insulator 20. Heater case (right) 21. Low-pressure pipe 2
22. O-ring 23. High-pressure pipe 3 24. Expansion valve
25. Evaporator 26. Heater case (left) 27. Foot duct (left)
28. Center case 29. Max. cool door (left) 30. Ventilator door
31. Side link 32. Mode door motor 33. Defroster door
34. Max. cool door (right) 35. Defroster door lever 36. Defroster door link
: N·m (kg-m, in-lb)
: Always replace after every disassembly.

ATC-130
MODE DOOR MOTOR
Revision: 2006 July 2007 FX35/FX45
MODE DOOR MOTORPFP:27731
Removal and InstallationNJS000EW
REMOVAL
1. Remove blower unit. Refer to ATC-120, "BLOWER UNIT" .
2. Remove mounting screws, and then remove mode door motor.
3. Disconnect mode door motor connector.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA0954E

AIR MIX DOOR MOTOR ATC-131
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Revision: 2006 July 2007 FX35/FX45
AIR MIX DOOR MOTOR PFP:27732
Removal and InstallationNJS000EX
REMOVAL
Driver Side
1. Set the temperature control switch (driver side) at 18 °C (60 °F), and then disconnect the battery cable from
the negative terminal.
2. Remove instrument driver lower panel. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
3. Remove mounting screws, and then remove air mix door motor.
4. Disconnect air mix door motor connector.
Passenger Side
1. Set the temperature control switch (passenger side) at 18 °C (60 °F), and then disconnect the battery cable
from the negative terminal.
2. Remove blower unit. Refer to ATC-120, "
BLOWER UNIT" .
3. Remove mounting screws, and then remove air mix door motor.
4. Disconnect air mix door motor connector.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA0956E
RJIA0955E

ATC-132
HEATER CORE
Revision: 2006 July 2007 FX35/FX45
HEATER COREPFP:27140
Removal and InstallationNJS000EY
REMOVAL
1. Remove heater & cooling unit assembly. Refer to ATC-125, "HEATER & COOLING UNIT ASSEMBLY" .
2. Remove foot duct (left). Refer to ATC-136, "
Removal of Foot Ducts" .
3. Remove mounting screws, and then remove heater pipe cover.
4. Remove heater pipe bracket.
5. Slide heater core (shown in the figure) to driver side.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2046E

DUCTS AND GRILLES ATC-133
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Revision: 2006 July 2007 FX35/FX45
DUCTS AND GRILLESPFP:27860
Removal and InstallationNJS000EZ
COMPONENT LAYOUT
REMOVAL
Removal of Center Ventilator Grilles
1. Remove cluster lid C. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Remove mounting screws, and then remove center ventilator grilles.
Removal of Side Ventilation
Remove side ventilation. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
Removal of Rear Ventilator Grilles
1. Remove center pillar lower garnish. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
1. Defroster nozzle 2. Side defroster duct (left) 3. Side ventilator duct (left)
4. Instrument panel 5. Side ventilation (left) 6. Center ventilator grille (left)
7. Center ventilator grille (right) 8. Side ventilation (right) 9. Center ventilator duct (right)
10. Side ventilator duct (right) 11. Side defroster duct (right) 12. Center ventilator duct
13. Center ventilator duct (left)
PJIA0166E
RJIA2048E

ATC-134
DUCTS AND GRILLES
Revision: 2006 July 2007 FX35/FX45
2. Remove mounting clips, and then remove rear ventilator grilles.
Removal of Defroster Nozzle, Ducts and Ventilator Ducts
1. Remove instrument panel and pad. Refer to IP-10, "INSTRUMENT PANEL ASSEMBLY" .
2. Remove mounting screws, and then remove side defroster ducts.
3. Remove mounting screws, and then remove defroster nozzle.
4. Remove mounting screws, and then remove side ventilator ducts (right and left).
5. Remove mounting screws, and then remove center ventilator duct.
RJIA2050E
RJIA2051E