2003 NISSAN X-TRAIL ENGINE COOLING SYSTEM

ENGINE MAINTENANCE (YD22DDTI)
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2. Check radiator cap relief pressure.

When connecting radiator cap to radiator cap tester (commer-
cial service tool) and radiator cap tester adapter (special ser-
vice tool), apply engine coolant to the cap seal surface.

Replace radiator cap if there is an unusualness in negative-
pressure valve, or if the relief pressure exceed the limit.
CHECKING RADIATOR SYSTEM FOR LEAKS

To check for leaks, apply pressure to the cooling system with
radiator cap tester (commercial service tool) and radiator cap
tester adapter (special service tool).
WARNING:
Never remove the radiator cap when the engine is hot. Seri-
ous burns could occur from high pressure engine coolant
escaping from the radiator.
CAUTION:
Higher test pressure than specified may cause radiator
damage.
NOTE:
In a case that engine coolant decreases, replenish radiator with engine coolant.

If anything is found, repair or replace damaged parts.
Checking Fuel LinesELS000CE
Inspect fuel lines, filler cap and tank for improper attachment, leaks,
cracks, damage, loose connections, chafing or deterioration.
If necessary, repair or replace faulty parts.
Changing Fuel FilterELS000CF
Standard:
78 - 98 kPa (0.78 - 0.98 bar, 0.8 - 1.0 kg/cm
2 , 11 - 14 psi)
Limit:
59 kPa (0.59 bar, 0.6 kg/cm
2 , 9 psi)
SLC135B
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2 , 23 psi)
SLC134B
SMA803A
PBIC2501E

CHASSIS AND BODY MAINTENANCE
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6. Check fluid condition.

If fluid is very dark or smells burned, refer to AT section for
checking operation of A/T. Flush cooling system after repair of
A/T.

If A/T fluid contains frictional material (clutches, bands, etc.),
replace radiator and flush cooler line using cleaning solvent
and compressed air after repair of A/T. Refer to CO-12,
"RADIATOR" , CO-14, "RADIATOR (ALUMINUM TYPE)" .
7. Install the removed dipstick in the A/T fluid charging pipe.
Changing A/T FluidELS000BW
1. Warm up A/T fluid.
2. Stop engine.
3. Drain A/T fluid from drain plug and refill with new A/T fluid.
Always refill same volume with drained fluid.
4. Run engine at idle speed for five minutes.
5. Check fluid level and condition. Refer to MA-38, "
Checking A/T Fluid" . If fluid is still dirty, repeat steps 2
through 5.
Checking Transfer OilELS000BT
Check for oil leakage and oil level.
CAUTION:
Never start engine while checking oil level.
Changing Transfer OilELS000BU
1. Drain oil from drain plug and refill with new gear oil.
SMA853B
Fluid grade:
Genuine Nissan ATF or equivalent. Refer to MA-
17, "RECOMMENDED FLUIDS AND LUBRI-
CANTS" .
Fluid capacity (With torque converter):
Approx. 8.5 (7-1/2 lmp qt)
Drain plug:
: 34 N·m (3.5 kg-m, 25 ft-lb)
SMA052D
Filler plug:
: 9.8 - 19.6 N·m (1.0 - 1.9 kg-m, 87 - 173 in-lb)
SDIA0513E

HEATER UNIT
MTC-27
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MTC

HEATER UNITPFP:27100
Removal and InstallationEJS001F9
REMOVAL
1. Drain coolant from cooling system. Refer to CO-9, "Changing Engine Coolant" for QR engine or CO-31,
"Changing Engine Coolant" for YD engine.
2. Disconnect two heater hoses from heater core pipe.
3. Remove instrument panel. Refer to IP-11, "
Removal and Installation" .
4. Remove blower unit. Refer to ATC-125, "
BLOWER UNIT" .
5. Remove clips of vehicle harness from steering member.
6. Remove mounting nuts, and then remove instrument stay.
7. Remove mounting bolts from heater (& cooling) unit.
RJIA0060E
RJIA0061E
RJIA2444E

HARNESS
PG-61
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Wiring Diagram Codes (Cell Codes) EKS0032J
Use the chart below to find out what each wiring diagram code stands for.
Refer to the wiring diagram code in the alphabetical index to find the location (page number) of each wiring
diagram.
Code Section Wiring Diagram Name
1STSIG AT A/T 1st Signal
2NDSIG AT A/T 2nd Signal
3RDSIG AT A/T 3rd Signal
4THSIG AT A/T 4th Signal
4WD TF 4WD Control system
A/C ATC Air Conditioner
ABS BRC Anti-Lock Brake System
APP1PW EC Accelerator Pedal Position Sensor 1 Power Supply
APP2PW EC Accelerator Pedal Position Sensor 2 Power Supply
APPS1 EC Accelerator Pedal Position Sensor
APPS2 EC Accelerator Pedal Position Sensor
APPS3 EC Accelerator Pedal Position Sensor
AT/IND DI A/T Indicator
AUDIO AV Audio
BA/FTS AT A/T Fluid Temperature Sensor and TCM Power Supply
BACK/L LT Back-Up Lamp
BOOST EC Turbocharger Boost Sensor
BRK/SW EC Brake Switch
CAN AT CAN Communication Line
CAN EC CAN Communication Line
CAN LAN CAN System
CHARGE SC Charging System
CHIME DI Warning Chime
CIGAR WW Cigarette Lighter
CLOCK DI Clock
CKPS EC Crankshaft Position Sensor
CMPS EC Camshaft Position Sensor
COOL/F EC Cooling Fan Control
D/LOCK BL Power Door Lock
DEF GW Rear Window Defogger
DTRL LT Headlamp - With Daytime Light System
ECM/PW EC ECM Power Supply for Back-Up
ECMRLY EC ECM Relay
ECTS EC Engine Coolant Temperature Sensor
EGVC/V EC EGR Volume Control Valve
EGRVLV EC EGR Volume Control Valve
ENGSS AT Engine Speed Signal
ESP BRC ESP/TCS/ABS Control System
ETC1 EC Electric Throttle Control Function
ETC2 EC Electric Throttle Control Motor Relay
ETC3 EC Electric Throttle Control Motor

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IDX
ALPHABETICAL INDEX
Blower unit ....................... ATC-125, MTC-22, MTC-24
BOOST - Wiring diagram ............... EC-1040, EC-1347
Boring/horning cylinder block(QR20DEQR25DE) .......
EM-103
Brake booster .................................................... BR-23
Brake fluid change ............................................... BR-8
Brake fluid level ................................................. MA-41
Brake fluid level and line check ........................... BR-8
Brake hydraulic line ........................................... BR-10
Brake inspection ................................................ MA-43
Brake lines and cables inspection ..................... MA-41
Brake master cylinder ........................................ BR-14
Brake pedal ......................................................... BR-6
Brake switch ..... EC-380, EC-733, EC-1177, EC-1475
BRK/SW - Wiring diagram EC-381, EC-735, EC-1178,
EC-1476
Bulb specifications .............................................. LT-92
Bumper, front ....................................................... EI-14
Bumper, rear ........................................................ EI-17
C
Camshaft inspection(QR20DEQR25DE) .......... EM-55
Camshaft inspection(YD22DDTi) .................... EM-171
Camshaft position sensor (CMPS) EC-1056, EC-1062,
EC-1363
, EC-1369
Camshaft position sensor (PHASE) .. EC-254, EC-646
Camshaft(QR20DEQR25DE) ........................... EM-53
Camshaft(YD22DDTi) ...................................... EM-170
CAN - Wiring diagram ......... EC-133, EC-580, EC-945,
EC-1269
, LAN-10, LAN-26, LAN-51, LAN-69, LAN-87
CAN (Controller Area Network) ........... BRC-8, LAN-9,
LAN-25
, LAN-50, LAN-68, LAN-86
CAN communication EC-38, EC-132, EC-500, EC-579,
EC-888
, EC-944, EC-1268, AT-32, AT-97, AT-329,
TF-43
, BRC-8, LAN-9, LAN-25, LAN-50, LAN-68,
LAN-86
Canister-See EVAP canister ............. EC-476, EC-868
CHARGE - Wiring diagram .................... SC-13, SC-14
Charging system ................................................ SC-12
Chassis and body maintenance ........................ MA-37
CHIME - Wiring diagram ................ DI-52, DI-55, DI-56
CIGAR - Wiring diagram .................................. WW-27
Cigarette lighter ............................................... WW-27
Circuit breaker ................................................... PG-12
CKPS - Wiring diagram .. EC-947, EC-1046, EC-1052,
EC-1271
, EC-1353, EC-1359
Clearance lamp ........................................ LT-4, LT-60
Clock ................................................................... DI-61
CLOCK - Wiring diagram .................................... DI-61
Closed loop control .............................. EC-35, EC-497
Clutch cover ....................................................... CL-14
Clutch disc ......................................................... CL-14
Clutch master cylinder ......................................... CL-8
Clutch operating cylinder ................................... CL-10
Clutch pedal ......................................................... CL-5
Clutch release bearing ....................................... CL-12
Clutch release mechanism ................................ CL-12
Clutch withdrawal lever ...................................... CL-12
CMPS - Wiring diagram . EC-947, EC-1058, EC-1064,
EC-1271
, EC-1365, EC-1371
Coil spring (rear) ............................................... RSU-8
Collision diagnosis .......................................... SRS-48
Combination meter ............................................... DI-4
Combination switch ............................................. LT-40
Component Location (auto A/C) ......... ATC-35, MTC-4
Compression pressure(QR20DEQR25DE) ..... EM-67
Compression pressure(YD22DDTi) ................ EM-196
Compressor clutch removal and installation .. ATC-146
Compressor special service tool ...................... ATC-14
Condenser ..................................................... ATC-155
Connecting rod bearing clearance(QR20DEQR25DE)
EM-101
Connecting rod bearing clearance(YD22DDTi) EM-232
Connecting rod bushing clearance(YD22DDTi) EM-226
Connecting rod(QR20DEQR25DE) ............... EM-101
Connecting rod(YD22DDTi) .............. EM-223, EM-228
CONSULT for engine ......................... EC-102, EC-551
CONSULT-II for engine ................... EC-926, EC-1251
Control lever (M/T) ............................................. MT-14
Control unit ..................................... ATC-120, MTC-21
Control units (terminal arrangement) ................. PG-72
Controller Area Network (CAN) ........... BRC-8, LAN-9,
LAN-25
, LAN-50, LAN-68, LAN-86
Converter housing installation ......................... AT-523
COOL/F - Wiring diagram EC-352, EC-704, EC-1014,
EC-1322
Coolant replacement(QR20DEQR25DE) ........ MA-20
Coolant replacement(YD22DDTi) ..................... MA-28
Cooling circuit (engine)(QR20DEQR25DE) ....... CO-7
Cooling circuit (engine)(YD22DDTi) ................. CO-29
Cooling fan ............................................ CO-18, CO-36
Cooling fan relay EC-363, EC-715, EC-1024, EC-1331
Coupling sleeve (M/T) ........................... MT-20, MT-25
Cowl top .............................................................. EI-20
Cowl top cover .................................................... EI-20
Crankcase ventilation system .......... EC-888, EC-1219
Crankcase ventilation system - See Positive crankcase
ventilation ........................................... EC-478
, EC-870
Crankshaft position sensor (POS) ..... EC-247, EC-638
Crankshaft position sensor (TDC) EC-1044, EC-1050,
EC-1351
, EC-1357
Crankshaft(QR20DEQR25DE) ........................ EM-83
Cylinder block boring(QR20DEQR25DE) ...... EM-104
Cylinder block boring(YD22DDTi) ................... EM-230
Cylinder block(QR20DEQR25DE) ................... EM-82
Cylinder block(YD22DDTi) .............................. EM-212
Cylinder head bolt tightening(QR20DEQR25DE) ........
EM-69
Cylinder head bolt tightening(YD22DDTi) ....... EM-198
Cylinder head gasket selection(YD22DDTi) ... EM-199
Cylinder head(QR20DEQR25DE) ................... EM-67
Cylinder head(YD22DDTi) .............................. EM-196
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Data link connector ............................ EC-469
, EC-861
Data link connector for Consult ......... EC-104, EC-553,

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IDX
ALPHABETICAL INDEX
Front Door Trim ................................................... EI-32
Front fog lamp .................................................... LT-52
Front passenger air bag .................................. SRS-35
Front seat .......................................................... SE-24
Front seat belt ...................................................... SB-3
Front seat belt pre-tensioner .... SB-2, SRS-3, SRS-40
Front side air bag ............................................. SRS-37
Front suspension ............................................... FSU-5
Front washer ...................................................... WW-4
Front wiper ......................................................... WW-4
FRPS - Wiring diagram .................... EC-999, EC-1309
FTS - Wiring diagram ...................... EC-994, EC-1304
FUEL - Wiring diagram ...................... EC-218, EC-225
Fuel check valve ................................ EC-473, EC-865
Fuel cut control (at no load high engine speed) EC-38,
EC-500
, EC-887, EC-1218
Fuel filler lid ...................................................... BL-103
Fuel filter .......................................... EC-890, EC-1221
Fuel filter replacement(QR20DEQR25DE) .......... FL-4
Fuel filter replacement(YD22DDTi) ....... FL-17, MA-31
Fuel gauge ............................................................ DI-4
Fuel injection control system ........... EC-885, EC-1216
Fuel injection system ......................... EC-216, EC-223
Fuel injector adjustment resistor .... EC-1115, EC-1404
Fuel injector and fuel tube(QR20DEQR25DE) . EM-32
Fuel injector and fuel tube(YD22DDTi) ............ EM-157
Fuel line inspection(QR20DEQR25DE) . FL-3, MA-23
Fuel line inspection(YD22DDTi) ............ FL-16, MA-31
Fuel pressure check ............................ EC-48, EC-510
Fuel pressure release .......................... EC-48, EC-510
Fuel pump .......... EC-443, EC-835, EC-890, EC-1127,
EC-1416
Fuel pump and gauge(QR20DEQR25DE) .......... FL-4
Fuel rail pressure sensor ................. EC-997, EC-1307
Fuel system(QR20DEQR25DE) .......................... FL-3
Fuel system(YD22DDTi) ..................................... FL-16
Fuel tank(QR20DEQR25DE) ............................ FL-11
Fuel tank(YD22DDTi) ......................................... FL-23
Fuel temperature sensor ................. EC-993, EC-1303
Fuse ................................................................... PG-12
Fuse and fusible link box ................................... PG-76
Fusible link ......................................................... PG-12
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Gauges ................................................................. DI-4
Gear components (M/T) ....................... MT-20, MT-25
Generator .......................................................... SC-12
Generator - See Alternator ................................ SC-12
Generic scan tool (GST) .................... EC-112, EC-931
Glass .................................................. GW-80, GW-83
GLOW - Wiring diagram EC-1070, EC-1170, EC-1458
Glow plug ....................................... EC-1169, EC-1457
Glow plug(YD22DDTi) ..................................... EM-152
Glow relay ...................... EC-1069, EC-1169, EC-1457
GPS antenna ..................................................... AV-43
Grille - See Exterior ............................................. EI-19
Ground distribution ............................................ PG-13
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H/AIM - Wiring diagram ...................................... LT-29
H/LAMP - Wiring diagram ........................... LT-4, LT-7
H/MIRROR - Wiring diagram ............................ GW-21
Harness connector ............................................. PG-70
Harness layout ................................................... PG-30
Headlamp ............................................................. LT-4
Headlamp aiming control .................................... LT-29
Headlamp leveler - See Headlamp aiming control .......
LT-29
Headlamp washer ............................................ WW-20
Headlining - See Roof trim .................................. EI-39
Heated oxygen sensor 1 .... EC-176, EC-183, EC-193,
EC-318
, EC-324, EC-611, EC-618, EC-786
Heated oxygen sensor 1 heater ......... EC-138, EC-771
Heated oxygen sensor 2 .... EC-201, EC-208, EC-330,
EC-338
, EC-792
Heated oxygen sensor 2 heater ......... EC-144, EC-776
Heated seat ........................................... SE-18, SE-21
HEATER - Wiring diagram ................................ MTC-6
Heater and cooling unit (Heater core) ............ ATC-131
Heater mirror ..................................................... GW-21
Heater system - Wiring diagram ....................... MTC-6
Heater unit (heater core) .. ATC-136, MTC-27, MTC-30
HFC134a (R134a) system precaution ............... ATC-4
HFC134a (R134a) system service procedure ATC-141
HFC134a (R134a) system service tools .......... ATC-15
HFC134a system service equipment precaution ..........
ATC-10
HO2S1 - Wiring diaram ...... EC-178, EC-186, EC-196,
EC-613
, EC-620
HO2S1H - Wiring diagram ............................... EC-140
HO2S2 - Wiring diagram .... EC-203, EC-211, EC-333,
EC-341
HO2S2H - Wiring diagram ............................... EC-146
Hood .................................................................. BL-12
Horn ................................................................. WW-25
HORN - Wiring diagram ................................... WW-25
How to erase DTC ........................... EC-514, EC-1223
How to erase DTC for OBD system ..... EC-63, EC-895
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IATS - Wiring diagram ...... EC-158
, EC-977, EC-1287
IATSEN - Wiring diagram ................................ EC-782
Identification ...................................... ATC-12, ATC-13
Idle air volume learning ........................ EC-46, EC-508
Idle speed ............. EC-79, EC-526, EC-905, EC-1231
Ignition coil ......................................... EC-417, EC-798
Ignition coil(QR20DEQR25DE) ....................... EM-29
Ignition control system ....................... EC-417, EC-798
Ignition timing ....................................... EC-79, EC-526
IGNSYS - Wiring diagram .................. EC-418, EC-799
ILL - Wiring diagram ........................................... LT-66
Illumination .......................................................... LT-66
In vehicle sensor ........... ATC-111, ATC-113, ATC-122
INJE/PW - Wiring diagram ............. EC-1158, EC-1446
INJECT - Wiring diagram . EC-429, EC-821, EC-1008,