2001 NISSAN X-TRAIL cooling

ATC-122
HEATER & COOLING UNIT ASSEMBLY
HEATER & COOLING UNIT ASSEMBLY
PFP:27110
Removal and InstallationEJS000UT
REMOVAL
1. Discharge refrigerant from A/C system.
2. Drain coolant from cooling system. Refer to CO-9, "
Changing
Engine Coolant" for QR engine, CO-29, "Changing Engine
Coolant" for YD engine.
3. Disconnect two heater hoses from heater core pipe.
4. Remove the instrument panel.
5. Remove the blower unit.
6. Remove clips of vehicle harness from steering member.
7. Remove the instrument stay.
8. Remove the bolts from heater & cooling unit.
9. Remove the steering member.
10. Remove the heater & cooling unit.
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HEATER & COOLING UNIT ASSEMBLY
ATC-123
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INSTALLATION
1. Installation is basically the reverse order of removal.
NOTE:
When filling radiator with coolant, refer to CO-9, "
Changing Engine Coolant" for QR engine, CO-29, "Chang-
ing Engine Coolant" for YD engine.
Disassembly and AssemblyEJS000UU
NOTE:
This illustration is for RHD models. The layout for LHD models is symmetrically opposite.
1. Cooler grommet 2. Screw 3. Heater pipe support
4. Screw 5. Expansion valve cover 6. Bolt
7. Expansion valve 8. Insulator 9. Evaporator
10. Slide door unit (Air mix door) 11. Evaporator cover 12. Screw
13. Screw 14. Air mix door motor 15. mode door motor
16. Screw 17. Ventilator door link 1 18. Ventilator door link 2
19. Ventilator door lever 20. Rod 21. Rod holder
22. Main link 23. Max cool door lever 24. Defroster door lever
25. Screw 26. Foot duct (right side) 27. Heater core
28. Heater core cover 29. Foot duct (left side) 30. Intake sensor bracket
31. Intake sensor 32. Screw 33. Aspirator
34. Screw 35. Heater & cooling unit case (right
side)36. Defroster door
37. Ventilator door 38. Max cool door 39. Heater & cooling unit case (left side)
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ATC-126
HEATER CORE
HEATER CORE
PFP:27140
Removal and InstallationEJS000W0
1. Remove the heater & cooling unit. Refer to ATC-122, "Removal
and Installation" .
2. Remove the heater pipe support.
3. Remove the foot duct and heater core cover.
4. Remove the heater core from the heater & cooling unit.
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ATC-128
DUCTS AND GRILLES
FOOT DUCT
1. Remove the heater & cooling unit. Refer to ATC-122, "Removal
and Installation" .
2. Remove the foot duct.
FLOOR DUCT
1. Remove the front seats. Refer to SE-7, "FRONT SEAT" .
2. Remove the instrument lower center panel. Refer to IP-5,
"Removal and Installation" .
3. Remove the front floor duct.
4. Peel back the floor trim to a point where the floor duct is visible.
5. Remove the mounting screw and clip from the rear floor duct.
6. Remove the rear floor duct.
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REFRIGERANT LINES
ATC-131
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ComponentsEJS00287
Refer to page AT C - 5 , "Precautions for Refrigerant Connection" .
WITH GASOLINE ENGINE
NOTE:
This illustration is for RHD models. The blower unit and heater & cooling unit layouts for LHD models are sym-
metrically opposite.
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ATC-132
REFRIGERANT LINES
WITH DIESEL ENGINE
NOTE:
This illustration is for LHD models. The blower unit and heater & cooling unit layouts for RHD models are sym-
metrically opposite.
Removal and Installation for CompressorEJS000V9
REMOVAL
WITH GASOLINE ENGINE
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REFRIGERANT LINES
ATC-145
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Removal and Installation for EvaporatorEJS000VG
REMOVAL
1. Using the recycling and recovery equipment (for HFC134a), dis-
charge the refrigerant from A/C system.
2. Disconnect the low-pressure flexible hose and the high-pressure
pipe from the evaporator.
CAUTION:
Cap or wrap the joint of the low-pressure flexible hose and
the high-pressure pipe with a suitable tool such as a vinyl
tape to avoid the entry of air.
3. Remove the cooler grommet cover and cooler grommet.
4. Remove the expansion valve cover and expansion valve.
5. Remove the blower unit.
6. Remove the evaporator cover.
7. Slide the evaporator, then remove it from the heater & cooling
unit.
8. Remove the intake sensor from the evaporator, then remove the
evaporator.
INSTALLATION
CAUTION:
●Replace the O-rings of the low-pressure flexible hose and the high-pressure pipe with new ones,
then apply compressor oil to them when installing them.
●Mark the mounting position of the intake sensor bracket.
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REFRIGERANT LINES
ATC-149
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NOTE:
After removing A/C manifold gauge set from service valves, wipe any residue from valves to prevent any
false readings by leak detector.
Cooling unit (Evaporator)
With engine OFF, turn blower fan on "High" for at least 15 seconds to dissipate any refrigerant trace in the
cooling unit. Wait a minimum of 10 minutes accumulation time (refer to the manufacturer's recommended
procedure for actual wait time) before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least 10 seconds. Use caution not to contaminate the probe tip with water
or dirt that may be in the drain hose.
5. If a leak detector detects a leak, verify at least once by blowing compressed air into area of suspected
leak, then repeat check as outlined above.
6. Do not stop when one leak is found. Continue to check for additional leaks at all system components.
If no leaks are found, perform steps 7 - 10.
7. Start engine.
8. Set the heater A/C control as follows;
a. A/C switch: ON
b. Face mode
c. Intake position: Recirculation
d. Max cold temperature
e. Fan speed: High
9. Run engine at 1,500 rpm for at least 2 minutes.
10. Turn engine off and perform leak check again following steps 4 through 6 above.
Refrigerant leaks should be checked immediately after stopping the
engine. Begin with the leak detector at the compressor. The pres-
sure on the high pressure side will gradually drop after refrigerant
circulation stops and pressure on the low pressure side will gradually
rise, as shown in the graph. Some leaks are more easily detected
when pressure is high.
11. Before connecting ACR4 to vehicle, check ACR4 gauges. No refrigerant pressure should be displayed. If
pressure is displayed, recover refrigerant from equipment lines and then check refrigerant purity.
12. Discharge A/C system using approved refrigerant recovery equipment. Repair the leaking fitting or com-
ponent as necessary.
13. Evacuate and recharge A/C system and perform the leak test to confirm no refrigerant leaks.
14. Conduct A/C performance test to ensure system works properly.
SHA839E