2006 INFINITI M35 cooling

HEATER & COOLING UNIT ASSEMBLY
ATC-137
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2006 January2006 M35/M45
CAUTION:
Replace O-rings of A/C piping 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.
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-40,
"Changing Engine Coolant" (VK45DE).
Recharge the refrigerant.
Heater & cooling unit assembly mounting bolt
: 6.9 Nꞏm (0.7 kg-m, 61 in-lb)
Instrument stay mounting nut and bolt
: 12 Nꞏm (1.25 kg-m, 9 ft-lb)

ATC-138
HEATER & COOLING UNIT ASSEMBLY
Revision: 2006 January2006 M35/M45
Disassembly and AssemblyNJS000HG
1. Aspirator 2. Aspirator hose 3. Front heater duct (left)
4. Foot duct (left) 5. Ventilator door (left) 6. Ventilator door (right)
7. Foot duct (right) 8. Main link sub (right) 9. Ventilator door lever (right)
10. Ventilator door link (right) 11. Main link (right) 12. Mode door motor (passenger side)
13. Max. cool door link (right) 14. Air mix door motor (passenger side) 15. Intake sensor
16. Intake sensor bracket 17. Low-pressure pipe 1 18. High-pressure pipe 2
19. Expansion valve 20. Cooler pipe grommet 21. Insulator
22. Evaporator cover adapter 23. Air mix door (Slide door) 24. Clip
25. Heater & cooling unit case (left) 26. Heater pipe grommet 27. Heater core
28. Upper ventilator door motor 29. Air mix door motor (driver side) 30. Mode door motor (driver side)
31. Main link (left) 32. Main link sub (left) 33. Ventilator door lever (left)
34. Center case 35. Max. cool door lever (right) 36. Evaporator cover
RJIA4122E

HEATER & COOLING UNIT ASSEMBLY
ATC-139
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2006 January2006 M35/M45
37. Evaporator 38. Heater & cooling unit case (right) 39. Upper ventilator door
40. Heater pipe cover 41. Upper ventilator door rod 42. Upper ventilator door lever
43. Defroster door link 44. Ventilator door link (left) 45. Max. cool door lever (left)
46. Max. cool door (left) 47. Max. cool door (right) 48. Defroster door (right)
49. Defroster door (left) 50. Max. cool door link (left) 51. Defroster door lever

ATC-140
MODE DOOR MOTOR
Revision: 2006 January2006 M35/M45
MODE DOOR MOTORPFP:27731
Removal and InstallationNJS000HH
REMOVAL
Driver Side
1. Remove heater & cooling unit assembly. Refer to ATC-135, "HEATER & COOLING UNIT ASSEMBLY" .
2. Remove mounting screws, and then remove mode door motor.
3. Disconnect mode door motor connector.
Passenger Side
1. Remove blower unit. Refer to ATC-130, "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.
RJIA4124E
RJIA4123E

AIR MIX DOOR MOTOR
ATC-141
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2006 January2006 M35/M45
AIR MIX DOOR MOTOR PFP:27732
Removal and InstallationNJS000HI
REMOVAL
Driver Side
1. Set the temperature (driver side) at 18C (60F), and then disconnect the battery cable from the negative
terminal.
2. Remove heater & cooling unit assembly. Refer to ATC-135, "
HEATER & COOLING UNIT 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 (passenger side) at 18C (60F), and then disconnect the battery cable from the neg-
ative terminal.
2. Remove blower unit. Refer to ATC-130, "
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.
RJIA4126E
RJIA4125E

ATC-142
UPPER VENTILATOR DOOR MOTOR
Revision: 2006 January2006 M35/M45
UPPER VENTILATOR DOOR MOTORPFP:27731
Removal and InstallationNJS000HJ
REMOVAL
1. Remove heater & cooling unit assembly. Refer to ATC-135, "HEATER & COOLING UNIT ASSEMBLY" .
2. Remove mounting screws.
3. Disconnect upper ventilator door motor connector.
4. Disconnect upper ventilator door rod, and then remove upper
ventilator door motor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA4127E

HEATER CORE
ATC-143
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2006 January2006 M35/M45
HEATER COREPFP:27140
Removal and InstallationNJS000HK
REMOVAL
1. Remove heater & cooling unit assembly. Refer to ATC-135, "HEATER & COOLING UNIT ASSEMBLY" .
2. Remove mounting screws, and then remove heater pipe cover.
3. Remove mounting screws, and then remove foot duct (left).
4. Slide heater core (shown in the figure) to leftward.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA4128E

ATC-162
REFRIGERANT LINES
Revision: 2006 January2006 M35/M45
Removal and Installation of Low-Pressure Pipe 1 and High-Pressure Pipe 2NJS000HS
REMOVAL
1. Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
2. Set the temperature control switch (passenger side) at 18
C (60F), and then disconnect the battery cable
from the negative terminal.
3. Remove cowl top cover. Refer to EI-18, "
COWL TOP" .
4. Remove mounting bolt from low-pressure flexible hose bracket.
5. Remove high-pressure pipe 1 from vehicle clip.
6. Disconnect one-touch joints.
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 the pipe with suitable material such
as vinyl tape to avoid the entry of air.
7. Remove instrument passenger lower panel and glove box. Refer
to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
8. Remove foot grille (right). Refer to ATC-149, "
Removal of Foot
Grilles" .
9. Remove air mix door motor (passenger side). Refer to ATC-141, "
AIR MIX DOOR MOTOR" .
10. Remove mode door motor (passenger side). Refer to ATC-140, "
MODE DOOR MOTOR" .
11. Remove main link (right) and max. cool door link (right). Refer to ATC-135, "
HEATER & COOLING UNIT
ASSEMBLY" .
12. Remove mounting screws, and then remove evaporator cover.
RJIA4169E
RJIA4117E
RJIA4170E