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Nissan Leaf. Manual - part 748

HA-114

< REMOVAL AND INSTALLATION >

[WITHOUT HEAT PUMP SYSTEM]

HEATING AND COOLING UNIT ASSEMBLY

HEATING AND COOLING UNIT ASSEMBLY
HEATING AND COOLING UNIT ASSEMBLY : Removal and Installation

INFOID:0000000010122182

DANGER:

Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of

electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are

handled incorrectly. Be sure to follow the correct work procedures when performing inspection and

maintenance.

WARNING:

• Be sure to remove the service plug in order to disconnect the high voltage circuits before perform-

ing inspection or maintenance of high voltage system harnesses and parts.

• The removed service plug must always be carried in a pocket of the responsible worker or placed in

the tool box during the procedure to prevent the plug from being connected by mistake.

• Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses

before beginning work on the high voltage system.

• Never allow workers other than the responsible person to touch the vehicle containing high voltage

parts. To keep others from touching the high voltage parts, these parts must be covered with an insu-

lating sheet except when using them. Refer to

GI-34, "High Voltage Precautions"

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise

instructed in the Service Manual. A malfunction may occur if this is not observed.

REMOVAL

WARNING:

Disconnect high voltage circuit. Refer to

GI-33, "How to Disconnect High Voltage"

1. Check voltage in high voltage circuit. (Check that condenser are discharged.)
a. Lift up the vehicle, and then remove Li-ion battery under covers. Refer to

EVB-181, "Exploded View"

b. Disconnect high voltage connector from front side of Li-ion battery. Refer to

EVB-181, "Removal and

Installation"

Measure voltage between high voltage harness terminals.

DANGER:

Touching high voltage components without using the appropriate protective equipment will

cause electrocution.

28. Lower air mix door

29. Upper air mix door

30. Air mix door guide

31. Foot door rod

32. Side ventilator door

33. Foot door

34. Side ventilator door seal LH

35. Lower attachment case

36. Side ventilator seal RH

37. Center ventilator and defroster door

38. Sub defroster door

39. Upper attachment case

40. Defroster seal

41. Ventilator seal

42. Intake seal

43. Lower intake case

44. Intake door

45. Upper intake case

46. Power transistor

47. Sub harness

: Always replace after every disassembly.

: N·m (kg-m, in-lb)

JPCIA0296ZZ

HEATING AND COOLING UNIT ASSEMBLY

HA-115

< REMOVAL AND INSTALLATION >

[WITHOUT HEAT PUMP SYSTEM]

CAUTION:

For voltage measurements, use a tester which can measure to 500 V or higher.

2. Use the refrigerant recovery equipment (for HFC134a) and recover the refrigerant. Refer to

HA-85, "Recy-

cle Refrigerant"

3. Remove cowl top extension. Refer to

EXT-19, "Removal and Installation"

4. Remove bolt (A), and then disconnect low-pressure pipe (1) and

high-pressure pipe (2) from expansion valve.

CAUTION:

To prevent the inclusion of foreign matter, use a cap or vinyl

tape to seal off the connection ports of the pipe and expan-

sion valve from the atmosphere.

5. Remove instrument panel assembly. Refer to

HA-114, "HEATING AND COOLING UNIT ASSEMBLY :

Removal and Installation"

6. Remove side ventilator duct. Refer to

VTL-12, "Exploded View"

7. Disconnect drain hose (1).

8. Remove nuts (A), and then remove instrument stay (1).

Standard

: 5 V or less

JMIIA2673ZZ

AWIIA1734ZZ

AWIIA1665ZZ

HA-116

< REMOVAL AND INSTALLATION >

[WITHOUT HEAT PUMP SYSTEM]

HEATING AND COOLING UNIT ASSEMBLY

9. Remove screws (A), and then remove fuse block (J/B) (1).

10. Remove bolts (A) of ground wire from steering member.

11. Remove all harness connectors and mounting nuts necessary to allow steering column assembly to be

moved. Refer to

ST-35, "Removal and Installation"

12. Move steering column assembly to secure work space.
13. Remove all harness connectors and clips necessary to allow steering member to be removed. Move main

harness aside and secure work space so that steering member can be easily removed.

14. Remove bolts (A) and (B), and then remove steering member (1) from the vehicle.

CAUTION:

When removing steering member, 2 workers are required to prevent it from dropping.

15. Remove heating and cooling unit assembly from the vehicle.

INSTALLATION

JPIIA1789ZZ

JPIIA1790ZZ

JPIIA1791ZZ

HEATING AND COOLING UNIT ASSEMBLY

HA-117

< REMOVAL AND INSTALLATION >

[WITHOUT HEAT PUMP SYSTEM]

Note the following items, and then install in the reverse order of removal.

CAUTION:

• To prevent degradation in insulation performance, use special electric compressor oil as the com-

pressor oil.

• In order to prevent conventional PAG oil from becoming mixed in, never reuse recovered compres-

sor oil and instead always use new oil. The use of oil including the conventional PAG oil may

degrade the performance of insulation.

• To prevent performance degradation, never use a fluorescent agent in order to detect refrigerant

leakage. Also be careful that a fluorescent agent never enter the oil.

• To prevent leakage of refrigerant, replace the O-ring with a new one. Apply a coat of compressor oil

to the O-ring prior to installation.

• Perform a check for refrigerant leakage when charging with refrigerant. Refer to

HA-84, "Check

Refrigerant Leakage"

EVAPORATOR
EVAPORATOR : Removal and Installation

INFOID:0000000010122183

REMOVAL

1. Remove heating and cooling unit assembly. Refer to

HA-114, "HEATING AND COOLING UNIT ASSEM-

BLY : Removal and Installation"

2. Disassemble heating and cooling unit assembly, and then remove evaporator assembly.
3. Remove expansion valve and intake sensor from evaporator assembly.

INSTALLATION

Note the following items, and then install in the reverse order of removal.

CAUTION:

• To prevent leakage of refrigerant, replace the O-ring with a new one. Apply a coat of compressor oil

to the O-ring prior to installation.

• When installing the new evaporator, be sure to install the intake sensor in the same position as

before it was removed.

• When removing or installing the intake sensor, be sure not to rotate the bracket insertion part. Fail-

ure to do this may cause damage to the evaporator.

• After installing a new evaporator, adjust the compressor oil level. Refer to

HA-87, "Lubricant Adjust-

ing Procedure for Components Replacement Except Compressor"

EXPANSION VALVE
EXPANSION VALVE : Removal and Installation

INFOID:0000000010122184

DANGER:

Since hybrid vehicles and electric vehicles contain a high voltage battery, there is the risk of

electric shock, electric leakage, or similar accidents if the high voltage component and vehicle are

handled incorrectly. Be sure to follow the correct work procedures when performing inspection and

maintenance.

WARNING:

• Be sure to remove the service plug in order to disconnect the high voltage circuits before perform-

ing inspection or maintenance of high voltage system harnesses and parts.

• The removed service plug must always be carried in a pocket of the responsible worker or placed in

the tool box during the procedure to prevent the plug from being connected by mistake.

• Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses

before beginning work on the high voltage system.

• Never allow workers other than the responsible person to touch the vehicle containing high voltage

parts. To keep others from touching the high voltage parts, these parts must be covered with an insu-

lating sheet except when using them. Refer to

GI-34, "High Voltage Precautions"

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise

instructed in the Service Manual. A malfunction may occur if this is not observed.

REMOVAL

Content .. 746 747 748 749 ..