Infiniti G37 Coupe. Manual - part 1378

 

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Infiniti G37 Coupe. Manual - part 1378

 

 

HEATER & COOLING UNIT ASSEMBLY

VTL-35

< ON-VEHICLE REPAIR >

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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 

CO-8, "Draining"

.

3.

Remove cowl top cover. Refer to 

EXT-21, "Exploded View"

.

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 

IP-11, "Exploded View"

.

8.

Remove blower unit. Refer to 

VTL-30, "Exploded View"

.

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 

GI-4, "Components"

 for symbols in the figure.

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSIIA0037ZZ

JSIIA0657ZZ

JSIIA0136GB

VTL-36

< ON-VEHICLE REPAIR >

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 

VTL-45, "FRONT

DEFROSTER NOZZLE, SIDE DEFROSTER NOZZLE AND VENTILATOR DUCT : Exploded View"

14. Remove steering column mounting bolts (A) and nuts (B). Refer to 

ST-16, "WITHOUT ELECTRIC

MOTOR : Exploded View"

 (WITHOUT ELECTRIC MOTOR) or 

ST-17, "WITH ELECTRIC MOTOR :

Exploded View"

 (WITH ELECTRIC MOTOR).

15. Remove steering member mounting bolts (C).

JSIIA0038ZZ

JSIIA0039ZZ

Refer to 

GI-4, "Components"

 for symbols in the figure.

JSIIA0083GB

HEATER & COOLING UNIT ASSEMBLY

VTL-37

< ON-VEHICLE REPAIR >

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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 

STC-27, "4WAS FRONT ACTUATOR

NEUTRAL POSITION ADJUSTMENT : Description"

.

• Refer to 

CO-9, "Refilling"

 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

VTL-38

< ON-VEHICLE REPAIR >

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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