Infiniti EX35. Manual - part 1480

VTL-38

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HEATER & COOLING UNIT ASSEMBLY

Removal and Installation

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REMOVAL

1.

Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.

2.

Drain engine coolant from cooling system. Refer to 

CO-7, "Draining"

.

3.

Remove cowl top cover. Refer to 

EXT-22, "Exploded View"

.

4.

Remove engine cover. Refer to 

EM-25, "Exploded View"

.

5.

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.

6.

Disconnect one-touch joint between high-pressure pipe 1 (4)
and high-pressure pipe 2 (3) 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.

7.

Remove clamps (A), and then disconnect heater hoses (1).

8.

Remove instrument panel assembly. Refer to 

IP-11, "Exploded View"

.

9.

Remove defroster nozzle. Refer to 

VTL-52, "DEFROSTER NOZZLE : Exploded View"

.

10. Remove adaptor duct. Refer to 

VTL-51, "ADAPTOR DUCT : Exploded View"

.

11. Remove blower unit. Refer to 

VTL-31, "Exploded View"

.

12. Remove mounting nuts (A), and then remove instrument stay (left) (1) and instrument stay (right) (2).

49. Max. cool door lever

50.

Defroster door lever

51.

Defroster door link

52. Max. cool door link

53.

Intake sensor

54.

Intake sensor bracket

55. Air mix door motor (passenger side)

56.

Air mix door adapter

57.

Heater & cooling unit case (right)

58. Max. cool door (right)

59.

Max. cool door (left)

60.

Air mix door (Slide door)

*With left and right ventilation temperature separately system.

Refer to 

GI-4, "Components"

 for symbols in the figure.

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HEATER & COOLING UNIT ASSEMBLY

VTL-39

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13. Remove clamp (A), and then disconnect drain hose (1).

14. Remove mounting bolts (A) from steering member (1).

15. Remove mounting bolts (A) from steering member (1).

16. Remove ground bolts (B) from steering member.

17. Remove steering column mounting nuts (C) and bolts (D). Refer to 

ST-17, "WITHOUT ELECTRIC

MOTOR : Exploded View"

 (WITHOUT ELECTRIC MOTOR) or 

ST-20, "WITH ELECTRIC MOTOR :

Exploded View"

 (WITH ELECTRIC MOTOR).

18. Remove harness connector and clips of vehicle harness from steering member.

19. Remove mounting bolts (A) from steering member (1).

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VTL-40

< ON-VEHICLE REPAIR >

HEATER & COOLING UNIT ASSEMBLY

20. Remove steering member, and then remove heater & cooling unit assembly.

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:
• Refer to 

CO-8, "Refilling"

 when filling radiator with engine coolant.

• Recharge the refrigerant.

MODE DOOR MOTOR

VTL-41

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MODE DOOR MOTOR

Exploded View

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Removal and Installation

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REMOVAL

1.

Remove blower unit. Refer to 

VTL-31, "Exploded View"

.

1.

Air mix door motor (driver side)

2.

Air mix door motor adapter

3.

Heater & cooling unit assembly

4.

Ventilator door lever

5.

Foot door lever

6.

Foot door link

7.

Air mix door motor adapter

8.

Air mix door motor (passenger side) 9.

Ventilator door link

10. Blower unit

11.

Intake door lever 2

12. Intake door motor

13. Intake door link

14.

Intake door lever 1

15. Mode door motor

16. Mode door motor bracket

17.

Main link

18. Main link sub

19. Max.cool door link

20.

Defroster door link

21. Max.cool door lever

22. Defroster door lever

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