Nissan Leaf. Instruction — 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 Instruction. 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
b. Disconnect high voltage connector from front side of Li-ion battery. Refer to
.
c.
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]
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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
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 :
.
6. Remove side ventilator duct. Refer to
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]
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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
.
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
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 Instruction. A malfunction may occur if this is not observed.
REMOVAL
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