2003 NISSAN X-TRAIL Dual fan circuit

EC-78
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS

When there is an open circuit on MI circuit, the ECM can not warn the driver by lighting up MI when there is
trouble on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system has trouble and MI circuit is open by means of
operating fail-safe function.
The fail-safe function also operates when above diagnoses except MI circuit are detected and demands the
driver to repair the trouble.
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning
ignition switch ON or START.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned ON or START 40°C (104°F)
More than approx. 4 minutes after ignition ON
or START80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0221
P0222
P2135Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P1121 Electric throttle control
actuator(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.
(ECM detect the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the
engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or
more.
P1122 Electric throttle control
functionECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1124
P1126Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1128 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1229 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2122
P2123
P2127
P2128
P2138Accelerator pedal position
sensorThe ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor. DTC No. Detected items Engine operating condition in fail-safe mode
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

IDX-4
ALPHABETICAL INDEX
EC-926, EC-1251
Daytime light system ........................................... LT-20
Daytime running light - See Daytime light system LT-20
DEF - Wiring diagram ....................................... GW-21
Desiccant Assembly ...................................... ATC-156
Diagnosis sensor unit ..................................... SRS-41
Diagnostic trouble code (DTC) ...................... EC-1223
Diagnostic trouble code (DTC) for OBD system EC-19,
EC-54
, EC-482, EC-513, EC-874, EC-894, EC-1205
Diagnostic trouble code (DTC) inspection priority chart
EC-76
, EC-523, EC-904, EC-1230
Differential gear (FF M/T) ..................... MT-23, MT-28
DLC - Wiring diagram ........................ EC-469, EC-861
Door glass ........................................... GW-80, GW-83
Door glass Fitting Adjustment ............. GW-80, GW-83
Door lock ................................................. BL-91, BL-95
Door mirror ........................................................ GW-86
Door trim ............................................................. EI-32
Door, front .......................................................... BL-18
Door, rear ........................................................... BL-18
Drive belt inspection(QR20DEQR25DE) ......... MA-20
Drive belt inspection(YD22DDTi) ...................... MA-27
Drive belt(QR20DEQR25DE) .......................... EM-13
Drive belt(YD22DDTi) ..................................... EM-131
Drive shaft (front) ............................................. FAX-11
Drive shaft (rear) ............................................. RAX-10
Driver air bag .................................................. SRS-30
Dropping resistor (A/T) ...................... AT-160, AT-393
DTC work support ............................................ EC-111
DTRL - Wiring diagram ....................................... LT-20
Dual pressure switch ........ ATC-18, ATC-95, ATC-158
Duct and grilles ............................... ATC-137, MTC-33
E
ECM input/output signal ....................... EC-95
, EC-543
ECM power supply EC-124, EC-282, EC-571, EC-664,
EC-937
, EC-1261
ECM relay ...................................... EC-1110, EC-1399
ECM/PW - Wiring diagram ................. EC-283, EC-665
ECTS - Wiring diagram ...... EC-164, EC-599, EC-983,
EC-1293
EGR function ................ EC-1073, EC-1080, EC-1465
EGR volume control valve ............ EC-1073, EC-1080,
EC-1465
EGRC/V - Wiring diagram ............. EC-1076, EC-1083,
EC-1467
Electric sunroof .................................................. RF-10
Electric throttle control actuator ........ EC-290, EC-292,
EC-310
, EC-668, EC-671, EC-690
Electrical load signal circuit ................ EC-456, EC-848
Electrical unit ..................................................... PG-72
Electrical units location ...................................... PG-65
Electronic ignition (EI) system ............. EC-37, EC-499
Engine control circuit diagram EC-93, EC-541, EC-917,
EC-1243
Engine control component parts location .......... EC-88,
EC-536
Engine control module (ECM) ........... EC-279, EC-661, EC-1089
, EC-1091, EC-1378, EC-1380
Engine control system diagram and chart ........ EC-30,
EC-492
, EC-883, EC-1214
Engine coolant temperature sensor (ECTS) ... EC-162,
EC-597
, EC-981, EC-1291
Engine coolant(QR20DEQR25DE) .................... CO-9
Engine coolant(YD22DDTi) .............................. CO-31
Engine fail-safe system ....................... EC-77, EC-524
Engine oil filter replacement(QR20DEQR25DE) .........
MA-25
Engine oil filter replacement(YD22DDTi) MA-33, MA-35
Engine oil precautions .......................................... GI-7
Engine oil replacement(QR20DEQR25DE) ..... MA-23
Engine oil replacement(YD22DDTi) .................. MA-33
Engine oil(QR20DEQR25DE) ............................. LU-7
Engine oil(YD22DDTi) ....................................... LU-20
Engine removal(QR20DEQR25DE) ................ EM-78
Engine removal(YD22DDTi) ........................... EM-208
ETC1 - Wiring diagram ..................... EC-293, EC-673
ETC2 - Wiring diagram ..................... EC-304, EC-684
ETC3 - Wiring diagram ..................... EC-311, EC-691
EVAP canister purge volume control solenoid valve ....
EC-265
, EC-473, EC-809, EC-865
EVAP vapor lines inspection(QR20DEQR25DE) ........
MA-26
Evaporative emission (EVAP) system EC-473, EC-865
Evaporator .................................................... ATC-158
Exhaust manifold(QR20DEQR25DE) .............. EM-23
Exhaust manifold(YD22DDTi) ......................... EM-141
Exhaust system ................................................... EX-2
Exhaust system inspection ..................... EX-2, MA-37
Expansion valve ............................................ ATC-159
Exterior EI-21, EI-22, EI-24, EI-25, EI-26, EI-27, EI-28,
EI-30
, EI-31
F
F/FOG - Wiring diagram ......................... LT-52
, LT-53
F/PUMP - Wiring diagram EC-444, EC-836, EC-1134,
EC-1422
Fan control amp. ............................. ATC-84, ATC-129
Fan switch ....................................................... MTC-18
FIAR - Wiring diagram .................. EC-1117, EC-1406
Final drive (FF M/T) .............................. MT-23, MT-28
Finisher, interior - See Trim ................................ EI-32
Finisher, rear panel ............................................. EI-31
Floor trim ............................................................. EI-38
Flow charts ......................................................... GI-23
Fluid temperature sensor (A/T) ........................ AT-111
Fluorescent leak detector ............................. ATC-160
Flywheel (clutch) ................................................ CL-14
Flywheel runout(QR20DEQR25DE) EM-108, EM-235
Fog lamp, front ................................................... LT-52
Fork rod (M/T) ....................................... MT-22, MT-27
Freeze frame data EC-55, EC-514, EC-895, EC-1223
FRO2 - Wiring diagram ..................... EC-772, EC-787
Front bumper ...................................................... EI-14
Front disc brake ................................................. BR-27
Front door .......................................................... BL-18