2008 NISSAN LATIO service

REFRIGERANT LINES
MTC-77
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Type 2 A/C System
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1. Evaporator 2. Expansion valve 3. Low-pressure service valve
4. High-pressure service valve 5. Refrigerant pressure sensor 6. Shaft seal
7. Drain hose

MTC-78
< SERVICE INFORMATION >
REFRIGERANT LINES
Idler Pulley - Without A/C
Refer to MTC-4, "Precaution for Refrigerant Connection".
Removal and Installation of CompressorINFOID:0000000001704324
REMOVAL
1. Use the recovery/recycling equipment to evacuate the refrigerant.
2. Remove the two engine undercovers, using power tools.
3. Remove low-pressure flexible hose nut (A) and high-pressure
flexible hose bolt (B) from compressor.
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
NOTE:
Type 1 shown, type 2 is similar.
4. Remove A/C compressor belt. Refer to EM-13
.
5. Disconnect compressor connector (C).
6. Remove bolts (A) from compressor (1), using power tools.
7. Remove compressor (1) downward from the engine compart-
ment.
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1. Idler pulley 2. Bracket 3. Shaft
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REFRIGERANT LINES
MTC-79
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INSPECTION FOR CLUTCH DISC TO PULLEY CLEARANCE
1. Check the clearance around the entire periphery of the clutch disc.
• Measure the clearance for the type 1 compressor as shown.
• Measure the clearance for the type 2 compressor as shown.
2. If specified clearance is not obtained, replace compressor.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace O-rings of low-pressure flexible hose and high-pressure flexible hose with a new ones, and
apply compressor oil when installing.
• When recharging refrigerant, check for leaks.
Removal and Installation of Low-Pressure Flexible HoseINFOID:0000000001704325
REMOVAL
1. Use the recovery/recycling equipment to evacuate the refrigerant.
2. Remove engine cover. Refer to EM-18
.
3. Remove cowl top cover. Refer to EI-21
.
4. Remove lower dash insulator.
5. Remove ground wire harness (1).
6. Remove bolt (A) and nut (B) from low-pressure flexible hose (2)
bracket.Clutch disc to pulley clearance : 0.3 - 0.6 mm (0.012 - 0.024 in)
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Compressor bolts : 25 N·m (2.6 kg-m, 18 ft-lb)
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MTC-80
< SERVICE INFORMATION >
REFRIGERANT LINES
7. Remove bolt (A), and then disconnect low-pressure flexible
hose (1) and high-pressure pipe (2).
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
8. Remove nut (A), and then remove low-pressure flexible hose (1)
from compressor (2).
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace O-rings for A/C piping with new ones, and apply compressor oil when installing.
• When recharging refrigerant, check for leaks.
Removal and Installation of High-pressure Flexible HoseINFOID:0000000001704326
REMOVAL
1. Use the recovery/recycling equipment to evacuate the refrigerant.
2. Remove high-pressure flexible hose (1) bolt (A) from condenser
(2).
3. Remove bolt (A), and then remove high-pressure flexible hose
(1) from compressor (2).
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
INSTALLATION
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REFRIGERANT LINES
MTC-81
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Installation is in the reverse order of removal.
CAUTION:
• Replace O-rings of high-pressure flexible hose with a new ones, and apply compressor oil when
installing.
• When recharging refrigerant, check for leaks.
Removal and Installation of High-pressure PipeINFOID:0000000001704327
REMOVAL
1. Remove low-pressure flexible hose. Refer to MTC-79, "Removal and Installation of Low-Pressure Flexible
Hose".
2. Remove high-pressure pipe from the clips.
3. Remove high-pressure pipe bolt (A), and then remove high-
pressure pipe (1) from condenser (2).
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace O-rings of high-pressure pipe with a new ones, and apply compressor oil when installing.
• When recharging refrigerant, check for leaks.
Removal and Installation of Refrigerant Pressure SensorINFOID:0000000001704328
REMOVAL
1. Use the recovery/recycling equipment to evacuate the refrigerant.
2. Disconnect connector, and then remove refrigerant pressure
sensor (1) from condenser (2).
CAUTION:
When working, be careful not to damage the condenser
fins.
1. High-pressure pipe A. High-pressure pipe clips
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MTC-82
< SERVICE INFORMATION >
REFRIGERANT LINES
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace O-rings of refrigerant pressure sensor with a new one, and apply compressor oil when
installing.
• When recharging refrigerant, check for leaks.
Removal and Installation of CondenserINFOID:0000000001704329
REMOVAL
1. Remove the three upper headlamp bolts to reposition the headlamps out of the way
2. Remove the radiator core support upper. Refer to BL-19
.
3. Remove high-pressure flexible hose and high-pressure pipe from condenser. Refer to MTC-80, "
Removal
and Installation of High-pressure Flexible Hose" and MTC-81, "Removal and Installation of High-pres-
sure Pipe" .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
4. Disconnect refrigerant pressure sensor connector.
5. Tilt radiator toward rear of vehicle, and then remove condenser
(1) from between radiator and radiator core support upper.
CAUTION:
Be careful not to damage the core surface of condenser and
radiator.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace O-rings for A/C piping with new ones, and apply compressor oil when installing.
• When recharging refrigerant, check for leaks.
Removal and Installation of Liquid TankINFOID:0000000001704330
REMOVAL
1. Remove the condenser. Refer to MTC-82, "Removal and Installation of Condenser" .
2. Clean liquid tank and its surrounding area, and remove dirt and rust from liquid tank.
CAUTION:
Be sure to clean carefully.
3. Remove bolts (A) and (B) from liquid tank.
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REFRIGERANT LINES
MTC-83
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4. Remove liquid tank bracket (1) from protruding part of con-
denser (2).
5. Slide liquid tank (3) upward, and then remove liquid tank (3).
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Make sure liquid tank bracket (2) is securely installed at pro-
trusion of condenser (3). [Make sure liquid tank bracket (2)
does not move to a position below center of liquid tank (1).]
• Replace O-rings for A/C piping with new ones, and apply com-
pressor oil when installing.
• When recharging refrigerant, check for leaks. Refer to MTC-
84, "Checking of Refrigerant Leaks" .
Removal and Installation of EvaporatorINFOID:0000000001704331
REMOVAL
1. Remove A/C unit assembly. Refer to MTC-58 .
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
2. Remove air conditioner filter. Refer to MTC-68
.
3. Remove foot duct (right). Refer to MTC-69, "
Removal and Installation" .
4. Remove screws (A), and then remove expansion valve cover
(1).
5. Remove screws (A), and then remove evaporator cover (1).
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MTC-84
< SERVICE INFORMATION >
REFRIGERANT LINES
6. Remove evaporator (1) with lower blower case (2) from A/C unit
assembly.
7. Remove thermo control amp. (3) from evaporator (1), if
equipped (TYPE 1 systems).
8. Remove evaporator (1) from lower blower case (2).
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace O-rings for A/C piping with new ones, and apply compressor oil when installing.
• Mark the position of the thermo control amp., if equipped (TYPE 1 systems).
• When recharging refrigerant, check for leaks.
Removal and Installation of Expansion ValveINFOID:0000000001704332
REMOVAL
1. Use the recovery/recycling equipment to evacuate the refrigerant.
2. Remove cowl top cover. Refer to EI-21
.
3. Remove lower dash insulator.
4. Disconnect low-pressure flexible hose and high-pressure pipe from evaporator. Refer to MTC-58
.
5. Remove expansion valve bolts (A), and then remove expansion
valve (1).
CAUTION:
Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Replace O-rings of evaporator with new ones, and apply compressor oil when installing.
• When recharging refrigerant, check for leaks.
Checking of Refrigerant LeaksINFOID:0000000001704333
Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C oil leak-
age, damage and corrosion. A/C oil leakage may indicate an area of refrigerant leakage. Allow extra inspec-
tion time in these areas when using either an electronic refrigerant leak detector or fluorescent dye leak
detector.
If dye is observed, confirm the leak with an electronic refrigerant leak detector. It is possible a prior leak was
repaired and not properly cleaned.
When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all
system components and connections.
When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected
leak area at 25 to 50 mm (1 to 2 in) per second and no further than 1/4 inch from the component.
CAUTION:
Moving the electronic leak detector probe slower and closer to the suspected leak area will improve
the chances of finding a leak.
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