Infiniti G37 Coupe. Manual — part 1378
HEATER & COOLING UNIT ASSEMBLY
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Removal and Installation
INFOID:0000000001665944
REMOVAL
1.
Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
2.
Drain engine coolant from cooling system. Refer to
3.
Remove cowl top cover. Refer to
4.
Disconnect one-touch joint between low-pressure pipe 1 (1) and
low-pressure pipe 2 (2) with disconnector (SST: 9253089916)
(A).
CAUTION:
Cap or wrap the joint of the A/C piping with suitable mate-
rial such as vinyl tape to avoid the entry of air.
5.
Disconnect one-touch joint between high-pressure pipe 1 (3)
and high-pressure pipe 2 (4) with disconnector (SST:
9253089908).
CAUTION:
Cap or wrap the joint of the A/C piping with suitable mate-
rial such as vinyl tape to avoid the entry of air.
6.
Remove clamp (A), and then disconnect heater hoses (1).
7.
Remove instrument panel & pad. Refer to
8.
Remove blower unit. Refer to
9.
Remove clips of vehicle harness from steering member.
10. Remove mounting nuts (A), and then remove instrument stays (1).
37.
Max. cool door lever
38.
Foot door link
39. Defroster door link
40.
Max. cool door link
41.
Main link sub
42. Evaporator cover
43.
Heater & cooling unit case (right)
44.
Evaporator
45. Drain hose
46.
Clamp
47.
Air mix door (Slide door)
48. Air mix door adapter
49.
Heater pipe cover
50.
Max. cool door (left)
51. Defroster door (left)
52.
Center case
53.
Defroster door (right)
54. Max. cool door (right)
*
With left and right ventilation temperature separately system.
Refer to
for symbols in the figure.
Refer to
JSIIA0037ZZ
JSIIA0657ZZ
JSIIA0136GB
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HEATER & COOLING UNIT ASSEMBLY
11. Remove clamp (A), and then remove drain hose (1).
12. Remove mounting bolts (A) from heater & cooling unit assembly
(1).
13. Remove front defroster nozzle, side defroster nozzles and ventilator duct. Refer to
DEFROSTER NOZZLE, SIDE DEFROSTER NOZZLE AND VENTILATOR DUCT : Exploded View"
.
14. Remove steering column mounting bolts (A) and nuts (B). Refer to
(WITHOUT ELECTRIC MOTOR) or
(WITH ELECTRIC MOTOR).
15. Remove steering member mounting bolts (C).
JSIIA0038ZZ
JSIIA0039ZZ
Refer to
for symbols in the figure.
JSIIA0083GB
HEATER & COOLING UNIT ASSEMBLY
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16. Remove steering member (1), and then remove heater & cooling unit (2).
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• 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 clicks is heard.
• After piping connection is completed, pull male-side piping by hand to make sure that connection
does not come loose.
• Check for leakages when recharging refrigerant.
NOTE:
• Perform 4WAS front actuator adjustment (WITH 4WAS). Refer to
NEUTRAL POSITION ADJUSTMENT : Description"
• Refer to
when filling radiator with engine coolant.
• Recharge the refrigerant.
Heater & cooling unit (1) assembly mounting bolt (A)
: 6.9 N·m (0.7 kg·m, 61 in-lb)
JSIIA0039ZZ
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MODE DOOR MOTOR
MODE DOOR MOTOR
Exploded View
INFOID:0000000001713726
1.
Aspirator
2.
Aspirator hose
3.
Front heater duct
4.
Foot duct (left)
5.
Defroster seal
6.
Packing
7.
Ventilator seal
8.
Ventilator door
9.
Foot duct (right)
10. Defroster door lever
11.
Foot door lever
12.
Ventilator door lever
13. Ventilator door link
14.
Main link
15.
Mode door motor bracket
16. Mode door motor
17.
Air mix door motor (passenger side)
18.
Intake sensor
19. Intake sensor bracket
20.
O-ring
21.
Low-pressure pipe 1
22. High-pressure pipe 2
23.
Expansion valve
24.
Cooler pipe grommet
25. Insulator
26.
Evaporator cover adapter
27.
Heater pipe bracket
28. Case rubber
29.
Case packing
30.
Heater & cooling unit case (left)
31. Heater pipe grommet
32.
Heater core
33.
Air mix door motor (driver side)
*
34. Foot door (left)
35.
Rear ventilator door
36.
Foot door (right)
JSIIA0863GB
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