2003 NISSAN X-TRAIL cooling

ATC-120
HEATER CORE
HEATER CORE
PFP:27140
Removal and InstallationEJS000W0
1. Remove the heater & cooling unit. Refer to .AT C - 11 5 , "HEATER
&COOLING UNIT ASSEMBLY"
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.
RJIA0069E

ATC-122
DUCTS AND GRILLES
Foot Duct
EJS000V5
1. Remove the heater & cooling unit. Refer toATC-115, "HEATER
&COOLING UNIT ASSEMBLY".
2. Remove the foot duct.
Floor ductEJS000V6
1. Remove the front seats.
2. Remove the instrument lower center panel.
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-125
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AT C
ComponentsEJS000V8
Refer to pageAT C - 5reading "Precautions for Refrigerant connection".
NOTE:
This illustration is for RHD models. The blower unit and heater&cooling unit layouts for LHD models are sym-
metrically opposite.
*1 LubricantAT C - 2 1 , "LUBRICANT
RETURN OPERATION"
*3 Refrigerant leaksATC-140, "Check-
ing for Refrigerant Leaks"
*4 Performance test diagnosesAT C - 8 3 ,
"PERFORMANCE TEST DIAG-
NOSES"
*2 Checking for refrigerant leaksAT C -
140
RJIA0576E

ATC-126
REFRIGERANT LINES
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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RJIA0578E

REFRIGERANT LINES
ATC-139
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AT C
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:
lReplace 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.
lMark the mounting position of the intake sensor bracket.
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REFRIGERANT LINES
ATC-143
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AT C
Check all around the service valves. Ensure service valve caps are secured on the service valves (to pre-
vent leaks).
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.
Service Data and Specifications (SDS)EJS000VN
COMPRESSOR
SHA708EA
ModelWith gasoline engine With diesel engine
CALSONIC KANSEI make V-6 ZEXEL VALEO make DKV-11G
Type V-6 variable displacement Vane rotary

CO-1
ENGINE COOLING SYSTEM
B ENGINE
CONTENTS
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SECTION
A
CO
ENGINE COOLING SYSTEM
QR20DE
PRECAUTIONS .......................................................... 3
Precautions For Liquid Gasket ................................. 3
REMOVAL OF LIQUID GASKET .......................... 3
LIQUID GASKET APPLICATION PROCEDURE..... 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
OVERHEATING CAUSE ANALYSIS .......................... 5
Troubleshooting Chart .............................................. 5
COOLING SYSTEM .................................................... 7
Cooling Circuit .......................................................... 7
ENGINE COOLANT .................................................... 9
Inspection ................................................................. 9
LEVEL CHECK ..................................................... 9
LEAK CHECK ....................................................... 9
Changing Engine Coolant ........................................ 9
DRAINING ENGINE COOLANT ........................... 9
REFILLING ENGINE COOLANT ........................ 10
FLUSHING COOLING SYSTEM ......................... 10
RADIATOR ................................................................ 12
Removal and Installation ........................................ 12
REMOVAL ........................................................... 12
INSTALLATION ................................................... 12
Disassembly and Assembly Radiator Fan ............. 13
DISASSEMBLY ................................................... 13
ASSEMBLY ......................................................... 13
INSPECTION ......................................................... 13
CHECKING RADIATOR CAP .............................. 13
CHECKING RADIATOR ...................................... 14
RADIATOR (ALUMINUM TYPE) .............................. 15
Disassembly and Assembly ................................... 15
PREPARATION ................................................... 15
DISASSEMBLY ................................................... 15
ASSEMBLY ......................................................... 16
INSPECTION ...................................................... 18WATER PUMP .......................................................... 19
Removal and Installation ........................................ 19
REMOVAL ........................................................... 19
INSPECTION AFTER REMOVAL ....................... 20
INSTALLATION ................................................... 20
INSPECTION AFTER INSTALLATION ................ 20
THERMOSTAT AND WATER CONTROL VALVE .... 21
Removal and Installation ........................................ 21
REMOVAL ........................................................... 21
INSPECTION AFTER REMOVAL ....................... 22
INSTALLATION ................................................... 22
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 23
Capacity .................................................................. 23
Thermostat ............................................................. 23
Water Control Valve ................................................ 23
Radiator .................................................................. 23
Tightening Torque ................................................... 23
YD22DDTi
PRECAUTIONS ........................................................ 24
Precautions For Liquid Gasket ............................... 24
REMOVAL AND LIQUID GASKET ...................... 24
LIQUID GASKET APPLICATION PROCEDURE... 24
PREPARATION ......................................................... 25
Special Service Tools ............................................. 25
OVERHEATING CAUSE ANALYSIS ........................ 26
Troubleshooting Chart ............................................ 26
COOLING SYSTEM .................................................. 28
Cooling Circuit ........................................................ 28
ENGINE COOLANT .................................................. 30
Inspection ............................................................... 30
LEVEL CHECK .................................................... 30
LEAK CHECK ...................................................... 30
Changing Engine Coolant ....................................... 30
DRAINING ENGINE COOLANT .......................... 30
REFILLING ENGINE COOLANT ......................... 31
FLUSHING COOLING SYSTEM ......................... 32
RADIATOR ................................................................ 33
Removal and Installation ........................................ 33

OVERHEATING CAUSE ANALYSIS
CO-5
[QR20DE]
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OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartEBS009SB
Symptom Check items
Cooling sys-
tem parts
malfunctionPoor heat transferWater pump malfunction Worn or loose drive belt
— Thermostat stuck closed —
Damaged finsDust contamination or
paper clogging
Mechanical damage
Clogged radiator cooling
tubeExcess foreign material
(rust, dirt, sand, etc.)
Reduced air flowCooling fan does not oper-
ate
—— High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper coolant mixture
ratio———
Poor coolant quality — — —
Insufficient coolantCoolant leaksCooling hoseLoose clamp
Cracked hose
Water pump Poor sealing
Radiator capLoose
Poor sealing
RadiatorO-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tankExhaust gas leaks into
cooling systemCylinder head deterioration
Cylinder head gasket dete-
rioration