heater NISSAN X-TRAIL 2001 Service Repair Manual

TERMINOLOGY
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TERMINOLOGYPFP:00011
SAE J1930 Terminology List EAS000GH
All emission related terms used in this publication in accordance with SAE J1930 are listed. Accordingly, new
terms, new acronyms/abbreviations and old terms are listed in the following chart.
NEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM
Air cleaner ACL Air cleaner
Barometric pressure BARO ***
Barometric pressure sensor-BCDD BAROS-BCDD BCDD
Camshaft position CMP ***
Camshaft position sensor CMPS Crank angle sensor
Canister *** Canister
Carburetor CARB Carburetor
Charge air cooler CAC Intercooler
Closed loop CL Closed loop
Closed throttle position switch CTP switch Idle switch
Clutch pedal position switch CPP switch Clutch switch
Continuous fuel injection system CFI system ***
Continuous trap oxidizer system CTOX system ***
Crankshaft position CKP ***
Crankshaft position sensor CKPS ***
Data link connector DLC ***
Data link connector for CONSULT-II DLC for CONSULT-II Diagnostic connector for CONSULT-II
Diagnostic test mode DTM Diagnostic mode
Diagnostic test mode selector DTM selector Diagnostic mode selector
Diagnostic test mode I DTM I Mode I
Diagnostic test mode II DTM II Mode II
Diagnostic trouble code DTC Malfunction code
Direct fuel injection system DFI system ***
Distributor ignition system DI system Ignition timing control
Early fuel evaporation-mixture heater EFE-mixture heater Mixture heater
Early fuel evaporation system EFE system Mixture heater control
Electrically erasable programmable read
only memoryEEPROM ***
Electronic ignition system EI system Ignition timing control
Engine control EC ***
Engine control module ECM ECCS control unit
Engine coolant temperature ECT Engine temperature
Engine coolant temperature sensor ECTS Engine temperature sensor
Engine modification EM ***
Engine speed RPM Engine speed
Erasable programmable read only memory EPROM ***
Evaporative emission canister EVAP canister Canister
Evaporative emission system EVAP system Canister control solenoid valve
Exhaust gas recirculation valve EGR valve EGR valve

EM-70
[QR]
ENGINE ASSEMBLY
1. Release fuel pressure. Refer to EC-775, "FUEL PRESSURE RELEASE" [QR20DE (WITH EURO-OBD)],
EC-1139, "
FUEL PRESSURE RELEASE" [QR20DE (WITHOUT EURO-OBD)], EC-42, "FUEL PRES-
SURE RELEASE" [QR25DE (WITH EURO-OBD)] or EC-452, "FUEL PRESSURE RELEASE" [QR25DE
(WITHOUT EURO-OBD)].
2. Remove engine hood.
3. Drain engine coolant from radiator drain plug. Refer to CO-9, "
DRAINING ENGINE COOLANT" .
4. Remove the following parts.
●LH/RH undercovers
●LH/RH front wheels
●Battery
●Drive belts; Refer to EM-12, "REMOVAL" .
●Air duct and air cleaner case assembly; Refer to EM-14, "REMOVAL" .
●Alternator
●Radiator and radiator fan assembly; Refer to CO-11, "RADIATOR" .
5. Disconnect engine room harness from the engine side and set it aside for easier work.
6. Disconnect all the body-side vacuum hoses and air hoses at engine side.
Engine room LH
7. Disconnect fuel hose, and plug it to prevent fuel from draining. Refer to EM-16, "
INTAKE MANIFOLD"
8. Disconnect heater hose, and install plug it to prevent engine coolant from draining.
9. Disconnect select cable from transaxle (A/T models).
10. Remove clutch operating cylinder from transaxle, and move it aside (M/T models).
11. Disconnect shift cable from transaxle (M/T models).
Engine room RH
12. Remove engine coolant reservoir tank.
13. Remove air conditioner compressor with piping connected from engine. Temporarily secure it on body
with a rope to avoid putting load on it.
Vehicle underbody
14. Remove exhaust front tube.
15. Remove propeller shaft.
16. Remove steering shaft from steering gear.
17. Disconnect power steering fluid cooler piping at a point between body and engine.
18. Remove ABS sensor from brake caliper.
19. Remove brake caliper with piping connected from steering knuckle. Temporarily secure it on body with a
rope to avoid load on it.
20. Remove LH/RH suspensions from steering knuckle under strut.
Removal
21. Install engine slingers into front left of cylinder head and rear right of cylinder head.
●Use alternator bracket mounting bolt holes for the front side.
22. Lift with hoist and secure the engine in position.Slinger bolts:
Front
: 51.0 - 64.7 N·m (5.2 - 6.6 kg-m, 38 - 47 ft-lb)
Rear
: 24.5 - 31.4 N·m (2.5 - 3.2 kg-m, 18 - 23 ft-lb)
SBIA0271E

INTAKE MANIFOLD
EM-123
[YD22DDTi]
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INTAKE MANIFOLDPFP:14003
Removal and InstallationEBS00LRF
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain the engine coolant when the engine is hot.
1. Drain engine coolant. Refer to CO-29, "
Changing Engine Coolant" .
2. Remove air duct. Refer to EM-120, "
Removal and Installation" .
3. Remove charge air cooler and bracket. Refer to EM-122, "
Removal and Installation" .
4. Remove air inlet pipes. Refer to EM-127, "
Removal and Installation" .
5. Remove exhaust manifold cover.
6. Disconnect electronic EGR control valve water hoses and harness.
7. Disconnect heater hose.
8. Remove EGR Cooler.
PBIC0675E
1. Vacuum & fuel gallery 2. Water hose 3. Electronic EGR volume control valve
4. Gasket 5. EGR passage 6. EGR support
7. Water pipe 8. EGR Cooler 9. Intake manifold

EM-140
[YD22DDTi]
VACUUM PUMP
MODELS PRODUCED SINCE APRIL 2001
INSPECTION BEFORE REMOVAL
1. Disconnect vacuum hose, and connect a vacuum gauge via 3-way connector.
●Disconnect point where vacuum from vacuum pump can be measured directly and install 3-way con-
nector.
2. Start engine and measure generated vacuum at idle speed.
●If out of standard, check for air suction in vacuum route, and measure again.
●If still outside of standard, replace vacuum pump.
REMOVAL
1. Drain engine coolant. Refer to CO-29, "Changing Engine Coolant" .
2. Remove air duct and air cleaner case. Refer to EM-120, "
Removal and Installation" .
3. Remove charge air cooler and bracket. Refer to EM-122, "
Removal and Installation" .
4. Disconnect harness connector from fuel injector.
5. Remove injection tube. Refer to EM-144, "
Removal and Installation" .
6. Remove fuel injector oil seal.
7. Remove rocker cover. Refer to EM-156, "
Removal and Installation" .
8. Remove spill tube. Refer to EM-144, "
Removal and Installation" .
9. Remove nozzle support from NO.2 cylinder and fuel injector. Refer to EM-144, "
Removal and Installation"
.
10. Remove air inlet pipes. Refer to EM-127, "
Removal and Installation" .
11. Remove exhaust manifold cover.
12. Disconnect electronic EGR volume control valve water hose and harness.
13. Disconnect heater hose.
14. Remove EGR cooler.
SBIA0325E
Standard:
– 86.6 to – 101.3 kPa (– 866 to – 1,013 mbar, – 650 to – 760 mmHg, – 25.59 to – 29.92 inHg)

EM-194
[YD22DDTi]
ENGINE ASSEMBLY
REMOVAL
Description of work
Remove engine, transaxle and transfer assembly with front suspension member from vehicle down ward.
Separate suspension member, and then separate engine and transaxle.
Preparation
1. Remove engine hood.
2. Drain engine coolant from radiator drain plug.
3. Remove the following parts.
●LH/RH undercovers
●LH/RH front wheels
●Battery
●Drive belts; Refer to EM-119, "Removal and Installation" .
●Air duct and air cleaner case assembly; Refer to EM-120, "Removal and Installation" .
●Alternator
●Radiator and radiator fan assembly; Refer to CO-32, "Removal and Installation" .
●Charge air cooler
4. Disconnect engine room harness from the engine side and set it aside for easier work.
5. Disconnect all the body-side vacuum hoses and air hoses at engine side.
Engine room LH
6. Disconnect fuel feed and return hoses, and plug it to prevent fuel from draining.
7. Disconnect heater hose, and install plug it to prevent engine coolant from draining.
8. Remove clutch operating cylinder from transaxle, and move it aside.
9. Disconnect shift cable from transaxle.
Engine room RH
10. Remove engine coolant reservoir tank.
11. Remove air conditioner compressor with piping connected from engine. Temporarily secure it on body
with a rope to avoid putting load on it.
Vehicle underbody
12. Remove exhaust front tube.
13. Remove propeller shaft.
14. Remove steering shaft from steering gear.
15. Disconnect power steering fluid cooler piping at a point between body and engine.
16. Remove ABS sensor from brake caliper.
17. Remove brake caliper with piping connected from steering knuckle. Temporarily secure it on body with a
rope to avoid load on it.
18. Remove LH/RH suspensions from steering knuckle under strut.
Removal
19. Install engine slingers into front right of cylinder head and rear
left of cylinder head.
20. Lift with hoist and secure the engine in position.Slinger bolts:
: 30 - 37 N·m (3.0 - 3.8 kg-m, 22 - 27 ft-lb)
SBIA0191E

CO-10
[QR]
ENGINE COOLANT
REFILLING ENGINE COOLANT
1. Install reservoir tank, radiator drain plug and cylinder block drain plug.
●Apply sealant to the thread of cylinder block drain plug.
Use Genuine Liquid Gasket or equivalent.
2. Fill radiator and reservoir tank to specified level.
●Use genuine Nissan engine coolant or equivalent in its
quality. Refer to MA-16, "
RECOMMENDED FLUIDS AND
LUBRICANTS" .
●Pour engine coolant slowly of less than 2 (1-3/4 lmp qt)
a minute to allow air in system to escape.
3. Warm up engine to normal operating temperature without radia-
tor cap installed.
●If engine coolant overflows radiator filler hole, install
radiator cap.
4. Run engine at 3,000 rpm for 10 seconds and return to idle speed
with radiator cap installed.
●Repeat two or three times.
Watch engine coolant temperature gauge so as not to overheat the engine.
5. Stop engine and cool down to less than approximately 50°C(122°F).
●Cool down using a fan to reduce the time.
●If necessary, refill radiator up to filler neck with engine coolant.
6. Refill reservoir tank to MAX level line with engine coolant.
7. Repeat steps 4 through 6 two or more times with radiator cap installed until engine coolant level no longer
drops.
8. Check cooling system for leaks with engine running.
9. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000
rpm with heater temperature controller set at several position between COOL and WARM.
●Sound may be noticeable at heater unit.
10. If sound is heard, bleed air from cooling system by repeating steps 4 through 6 until engine coolant level
no longer drops.
●Clean excess engine coolant from engine.
FLUSHING COOLING SYSTEM
1. Fill radiator and reservoir tank with water and reinstall radiator cap.
2. Run engine and warm it up to normal operating temperature.
3. Rev engine two or three times under no-load.
4. Stop engine and wait until it cools down.
5. Drain water.
6. Repeat steps 1 through 5 until clear water begins to drain from radiator. Cylinder block drain plug:
: 7.8 - 11.8 N·m (0.8 -1.2 kg-m , 69 - 104 in-lb)
Engine coolant capacity (With reservoir tank):

Approx. 7.1 (6-1/4 Imp qt)
SMA182B
Reservoir tank: 0.6 (1/2 lmp qt)
SMA412B

CO-20
[QR]
THERMOSTAT AND WATER CONTROL VALVE
THERMOSTAT AND WATER CONTROL VALVE
PFP:21200
Removal and InstallationEBS00KOO
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator.
REMOVAL
Thermostat Removal
1. Drain engine coolant. Refer to CO-9, "DRAINING ENGINE COOLANT" .
CAUTION:
Perform when the engine cold.
2. Disconnect radiator lower hose at water inlet side.
3. Remove water inlet and thermostat.
Water Control Valve Removal
1. Drain engine coolant. Refer to CO-9, "DRAINING ENGINE COOLANT" .
2. Disconnect upper radiator hose, heater pipe and heater hose at water outlet side.
3. Remove water outlet.
4. Remove water control valve.
PBIC0239E
1. Thermostat 2. Water inlet 3. Water control valve
4. Water outlet 5. Heater hose 6. Engine coolant temperature sensor
7. Heater pipe

THERMOSTAT AND WATER CONTROL VALVE
CO-21
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INSPECTION AFTER REMOVAL
●Place a string so that it is caught in the valves of the thermostat
and water control valve. Immerse fully in a container filled with
water. Heat while stirring. (The example in the figure shows the
thermostat.)
●The valve opening temperature is the temperature at which the
valve opens and the falls from the thread.
●Continue heating. Check the full-open lift amount.
NOTE:
The full-open lift amount standard temperature for the water
control valve is the reference value.
● After checking the full-open lift amount, lower the water temper-
ature and check the valve closing temperature.
Standard values
INSTALLATION
Install in the reverse order of removal paying attention to the following.
●Install the engine coolant temperature sensor.
Use Genuine Liquid Gasket or equivalent.
Installation of Thermostat and Water Control Valve
●Install the thermostat and water control valve with the whole cir-
cumference of each flange part fit securely inside the rubber
ring. (The example in the figure shows the thermostat.)
●Install the thermostat with the jiggle valve facing upwards. (The
position deviation may be within the range of ±10°)
●Install the water control valve with the up-mark facing up and the
frame center part facing upwards. (The position deviation may
be within the range of ±10°)
Heater Pipe Installation
First apply a neutral detergent to the O-ring, then quickly insert the insertion parts of the heater pipe into the
installation holes.
SLC252B
Thermostat Water control valve
Valve opening temperature 80.5 - 83.5°C (177 - 182° F) 93.5 - 96.5°C (200 - 206°F)
Full-open lift amountMore than 8 mm/ 95°C
(0.315 in/ 203 °F)More than 8 mm/ 108°C
(0.315 in/ 226 ° F)
Valve closing temperature 77°C (171°F) 90°C (194° F)
PBIC0157E
PBIC0158E

ENGINE COOLANT
CO-31
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8. Repeat steps 5 through 7 two or more times with radiator cap installed until engine coolant level no longer
drops.
9. Check cooling system for leaks with engine running.
10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000
rpm with heater temperature controller set at several position between COOL and WARM.
●Sound may be noticeable at heater unit.
11. If sound is heard, bleed air from cooling system by repeating steps 5 through 7 until engine coolant level
no longer drops.
●Clean excess engine coolant from engine.
FLUSHING COOLING SYSTEM
1. Fill radiator with water until water spills from the air relief hole, then close air relief flag. Fill radiator and
reservoir tank with water and reinstall radiator cap.
2. Run engine and warm it up to normal operating temperature.
3. Rev engine two or three times under no-load.
4. Stop engine and wait until it cools down.
5. Drain water.
6. Repeat steps 1 through 5 until clear water begins to drain from radiator.

THERMOSTAT AND WATER PIPING
CO-41
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THERMOSTAT AND WATER PIPINGPFP:21200
Removal and InstallationEBS00BK9
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
engine coolant escaping from the radiator.
REMOVAL
1. Remove the engine undercover and splash cover (right and left).
2. Drain engine coolant. Refer to CO-29, "
DRAINING ENGINE COOLANT" .
CAUTION:
Perform when the engine cold.
3. Remove radiator lower hose from water inlet side.
4. Remove water inlet and thermostat.
5. Remove thermostat housing.
SBIA0133E
1. Thermostat 2. Water inlet 3. Thermostat housing
4. Water inlet pipe 5. Heater return pipe 6. Gasket