2005 NISSAN X-TRAIL relay

EC-13
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ECA
DTC P0606 ECM ...................................................1229
Description ..........................................................1229
On Board Diagnosis Logic ..................................1229
DTC Confirmation Procedure ..............................1229
Diagnostic Procedure ..........................................1230
DTC P0628, P0629 FUEL PUMP ..........................1231
Description ..........................................................1231
CONSULT-II Reference Value in Data Monitor Mode
1231
On Board Diagnosis Logic ..................................1231
DTC Confirmation Procedure ..............................1231
Wiring Diagram ...................................................1232
Diagnostic Procedure ..........................................1234
Component Inspection ........................................1235
Removal and Installation .....................................1235
DTC P0642, P0643 SENSOR POWER SUPPLY ..1236
On Board Diagnosis Logic ..................................1236
DTC Confirmation Procedure ..............................1236
Wiring Diagram ...................................................1237
Diagnostic Procedure ..........................................1238
DTC P0652, P0653 SENSOR POWER SUPPLY ..1240
On Board Diagnosis Logic ..................................1240
DTC Confirmation Procedure ..............................1240
Wiring Diagram ...................................................1241
Diagnostic Procedure ..........................................1242
DTC P0686 ECM RELAY .......................................1245
On Board Diagnosis Logic ..................................1245
DTC Confirmation Procedure ..............................1245
Wiring Diagram ...................................................1246
Diagnostic Procedure ..........................................1247
Component Inspection ........................................1248
DTC P1211 TCS CONTROL UNIT ........................1249
Description ..........................................................1249
On Board Diagnosis Logic ..................................1249
DTC Confirmation Procedure ..............................1249
Diagnostic Procedure ..........................................1249
DTC P1212 TCS COMMUNICATION LINE ...........1250
Description ..........................................................1250
On Board Diagnosis Logic ..................................1250
DTC Confirmation Procedure ..............................1250
Diagnostic Procedure ..........................................1250
DTC P1260 - P1267 FUEL INJECTOR ADJUST-
MENT RESISTOR ..................................................1251
Description ..........................................................1251
On Board Diagnosis Logic ..................................1251
DTC Confirmation Procedure ..............................1252
Wiring Diagram ...................................................1253
Diagnostic Procedure ..........................................1254
Component Inspection ........................................1255
Removal and Installation .....................................1256
DTC P1268 - P1271 FUEL INJECTOR .................1257
Component Description .......................................1257
CONSULT-II Reference Value in Data Monitor Mode
1257
On Board Diagnosis Logic ..................................1257
DTC Confirmation Procedure ..............................1258
Wiring Diagram ...................................................1259
Diagnostic Procedure ..........................................1261Component Inspection .........................................1262
Removal and Installation .....................................1262
DTC P1272 FUEL PUMP .......................................1263
Description ...........................................................1263
CONSULT-II Reference Value in Data Monitor Mode
1263
On Board Diagnosis Logic ...................................1263
DTC Confirmation Procedure ..............................1263
Wiring Diagram ....................................................1265
Diagnostic Procedure ..........................................1266
Component Inspection .........................................1268
Removal and Installation .....................................1269
DTC P1273 FUEL PUMP .......................................1270
Description ...........................................................1270
CONSULT-II Reference Value in Data Monitor Mode
1270
On Board Diagnosis Logic ...................................1270
DTC Confirmation Procedure ..............................1270
Wiring Diagram ....................................................1271
Diagnostic Procedure ..........................................1272
Component Inspection .........................................1274
Removal and Installation .....................................1274
DTC P1274 FUEL PUMP .......................................1275
Description ...........................................................1275
CONSULT-II Reference Value in Data Monitor Mode
1275
On Board Diagnosis Logic ...................................1275
DTC Confirmation Procedure ..............................1275
Wiring Diagram ....................................................1276
Diagnostic Procedure ..........................................1278
Component Inspection .........................................1279
Removal and Installation .....................................1279
DTC P1275 FUEL PUMP .......................................1280
Description ...........................................................1280
CONSULT-II Reference Value in Data Monitor Mode
1280
On Board Diagnosis Logic ...................................1280
DTC Confirmation Procedure ..............................1280
Wiring Diagram ....................................................1281
Diagnostic Procedure ..........................................1283
Component Inspection .........................................1284
Removal and Installation .....................................1284
DTC P2135 APP SENSOR ....................................1285
Description ...........................................................1285
CONSULT-II Reference Value in Data Monitor Mode
1285
On Board Diagnosis Logic ...................................1285
DTC Confirmation Procedure ..............................1285
Wiring Diagram ....................................................1287
Diagnostic Procedure ..........................................1289
Component Inspection .........................................1291
Removal and Installation .....................................1291
DTC P2146, P2149 FUEL INJECTOR POWER SUP-
PLY .........................................................................1292
Component Description .......................................1292
CONSULT-II Reference Value in Data Monitor Mode
1292
On Board Diagnosis Logic ...................................1292
DTC Confirmation Procedure ..............................1293

EC-17
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ECA
1570
On Board Diagnosis Logic ..................................1570
DTC Confirmation Procedure ..............................1570
Wiring Diagram ...................................................1571
Diagnostic Procedure ..........................................1573
Component Inspection ........................................1574
Removal and Installation .....................................1574
DTC P0642, P0643 SENSOR POWER SUPPLY ..1575
On Board Diagnosis Logic ..................................1575
DTC Confirmation Procedure ..............................1575
Wiring Diagram ...................................................1576
Diagnostic Procedure ..........................................1577
DTC P0652, P0653 SENSOR POWER SUPPLY ..1579
On Board Diagnosis Logic ..................................1579
DTC Confirmation Procedure ..............................1579
Wiring Diagram ...................................................1580
Diagnostic Procedure ..........................................1581
DTC P0686 ECM RELAY .......................................1584
On Board Diagnosis Logic ..................................1584
DTC Confirmation Procedure ..............................1584
Wiring Diagram ...................................................1585
Diagnostic Procedure ..........................................1586
Component Inspection ........................................1587
DTC P1211 TCS CONTROL UNIT ........................1588
Description ..........................................................1588
On Board Diagnosis Logic ..................................1588
DTC Confirmation Procedure ..............................1588
Diagnostic Procedure ..........................................1588
DTC P1212 TCS COMMUNICATION LINE ...........1589
Description ..........................................................1589
On Board Diagnosis Logic ..................................1589
DTC Confirmation Procedure ..............................1589
Diagnostic Procedure ..........................................1589
DTC P1260 - P1267 FUEL INJECTOR ADJUST-
MENT RESISTOR ..................................................1590
Description ..........................................................1590
On Board Diagnosis Logic ..................................1590
DTC Confirmation Procedure ..............................1591
Wiring Diagram ...................................................1592
Diagnostic Procedure ..........................................1593
Component Inspection ........................................1594
Removal and Installation .....................................1595
DTC P1268 - P1271 FUEL INJECTOR .................1596
Component Description .......................................1596
CONSULT-II Reference Value in Data Monitor Mode
1596
On Board Diagnosis Logic ..................................1596
DTC Confirmation Procedure ..............................1597
Wiring Diagram ...................................................1598
Diagnostic Procedure ..........................................1600
Component Inspection ........................................1601
Removal and Installation .....................................1601
DTC P1272 FUEL PUMP .......................................1602
Description ..........................................................1602
CONSULT-II Reference Value in Data Monitor Mode
1602
On Board Diagnosis Logic ..................................1602
DTC Confirmation Procedure ..............................1602
Wiring Diagram ...................................................1604Diagnostic Procedure ..........................................1605
Component Inspection .........................................1607
Removal and Installation .....................................1607
DTC P1273 FUEL PUMP .......................................1609
Description ...........................................................1609
CONSULT-II Reference Value in Data Monitor Mode
1609
On Board Diagnosis Logic ...................................1609
DTC Confirmation Procedure ..............................1609
Wiring Diagram ....................................................1610
Diagnostic Procedure ..........................................1611
Component Inspection .........................................1613
Removal and Installation .....................................1613
DTC P1274 FUEL PUMP .......................................1614
Description ...........................................................1614
CONSULT-II Reference Value in Data Monitor Mode
1614
On Board Diagnosis Logic ...................................1614
DTC Confirmation Procedure ..............................1614
Wiring Diagram ....................................................1615
Diagnostic Procedure ..........................................1617
Component Inspection .........................................1618
Removal and Installation .....................................1618
DTC P1275 FUEL PUMP .......................................1619
Description ...........................................................1619
CONSULT-II Reference Value in Data Monitor Mode
1619
On Board Diagnosis Logic ...................................1619
DTC Confirmation Procedure ..............................1619
Wiring Diagram ....................................................1620
Diagnostic Procedure ..........................................1622
Component Inspection .........................................1623
Removal and Installation .....................................1623
DTC P2135 APP SENSOR ....................................1624
Description ...........................................................1624
CONSULT-II Reference Value in Data Monitor Mode
1624
On Board Diagnosis Logic ...................................1624
DTC Confirmation Procedure ..............................1624
Wiring Diagram ....................................................1626
Diagnostic Procedure ..........................................1628
Component Inspection .........................................1630
Removal and Installation .....................................1630
DTC P2146, P2149 FUEL INJECTOR POWER SUP-
PLY .........................................................................1631
Component Description .......................................1631
CONSULT-II Reference Value in Data Monitor Mode
1631
On Board Diagnosis Logic ...................................1631
DTC Confirmation Procedure ..............................1631
Wiring Diagram ....................................................1632
Diagnostic Procedure ..........................................1634
DTC P2147, P2148 FUEL INJECTOR CIRCUIT ...1635
Component Description .......................................1635
CONSULT-II Reference Value in Data Monitor Mode
1635
On Board Diagnosis Logic ...................................1635
DTC Confirmation Procedure ..............................1635
Wiring Diagram ....................................................1636

EC-34
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM

System ChartEBS010L8
*1: This sensor is not used to control the engine system under normal conditions.
*2: This input signal is sent to the ECM through CAN communication line.
*3: This output signal is sent from the ECM through CAN communication line.
*4: For models with ESP
*5: For models without ESP
*6: For QR25DE engine modelsInput (Sensor) ECM Function Output (Actuator)

Camshaft position sensor (PHASE)

Crankshaft position sensor (POS)

Mass air flow sensor

Engine coolant temperature sensor

Heated oxygen sensor 1

Throttle position sensor

Accelerator pedal position sensor

Park/neutral position (PNP) switch

Intake air temperature sensor

Power steering pressure sensor

Ignition switch

Battery voltage

Knock sensor

Refrigerant pressure sensor

Stop lamp switch

Heated oxygen sensor 2*1

TCM (Transmission control module)*2

ESP/TCS/ABS control unit*2 *4

ABS actuator and electric unit
(control unit)*2 *5

Air conditioner switch

Wheel sensor*2

Electrical load signal

ASCD steering switch*6

ASCD brake switch*6

ASCD clutch switch*6

Stop lamp switchFuel injection & mixture ratio control Fuel injector
Electronic ignition system Power transistor
Fuel pump control Fuel pump relay
On board diagnostic system
MI (On the instrument panel)*
3
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control Air conditioner relay
Power valve control*
6VIAS control solenoid valve
ASCD vehicle speed control*
6Electric throttle control actuator
Cooling fan control Cooling fan relay

EC-38
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM


At idle

At low battery voltage

During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Air Conditioning Cut ControlEBS010LB
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.

When the accelerator pedal is fully depressed.

When cranking the engine.

At high engine speeds.

When the engine coolant temperature becomes excessively high.

When operating power steering during low engine speed or low vehicle speed.

When engine speed is excessively low.

When refrigerant pressure is excessively low or high.
Fuel Cut Control (at No Load and High Engine Speed)EBS010LC
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 1,800 rpm under no load (for example, the shift position is neutral and engine
speed is over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies
based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under EC-35, "
Multiport Fuel Injection (MFI) System" .
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch Air conditioner ON signal
Air conditioner
cut controlAir conditioner relay Throttle position sensor Throttle valve opening angle
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
2
Engine coolant temperature sensor Engine coolant temperature
Battery
Battery voltage*
2
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
Wheel sensor*
1Vehicle speed
Sensor Input Signal to ECM ECM function Actuator
Park/neutral position (PNP) switch Neutral position
Fuel cut control Fuel injector Accelerator pedal position sensor Accelerator pedal position
Engine coolant temperature sensor Engine coolant temperature
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed
Wheel sensor* Vehicle speed

TROUBLE DIAGNOSIS
EC-77
[QR (WITH EURO-OBD)]
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EC

DTC Inspection Priority ChartEBS010LQ
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC U1000 and/or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC
U1000 and U1001. Refer to EC-133, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
*: For QR25DE engine modelsPriority Detected items (DTC)
1

U1000 U1001 CAN communication line

P0102 P0103 Mass air flow sensor

P0112 P0113 Intake air temperature sensor

P0117 P0118 Engine coolant temperature sensor

P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor

P0327 P0328 Knock sensor

P0335 Crankshaft position sensor (POS)

P0340 Camshaft position sensor (PHASE)

P0500 Vehicle speed sensor

P0605 ECM

P0705 Park/Neutral position (PNP) sensor

P1229 Sensor power supply

P1610-P1615 NATS

P1706 Park/Neutral position (PNP) switch

P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
2

P0031 P0032 Heated oxygen sensor 1 heater

P0037 P0038 Heated oxygen sensor 2 heater

P0132 P0133 P0134 P1143 P1144 Heated oxygen sensor 1

P0138 P0139 P1146 P1147 Heated oxygen sensor 2

P0444 EVAP canister purge volume control solenoid valve

P0550 Power steering pressure sensor

P0710 P0720 P725 P0740 P0745 P0750 P0755 P1705 P1760 A/T related sensors and solenoid valves

P1065 ECM power supply

P 1111 I n ta k e v a l v e t i m i n g c o n t r o l s o l e n o i d v a l v e

P1122 Electric throttle control function

P1124 P1126 Throttle control motor relay

P1128 Throttle control mother

P1211 TCS control unit

P1212 TCS communication line

P1720 Vehicle speed sensor

P1805 Brake switch
3

P0011 Intake valve timing control

P0171 P0172 Fuel injection system function

P0300 - P0304 Misfire

P0420 Three way catalyst function

P0731 - P0734 A/T function

P1121 Electric throttle control actuator

P1217 Engine over temperature (OVERHEAT)

P1564 ASCD steering switch*

P1572 ASCD brake switch*

P1574 ASCD vehicle speed sensor*

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

Fail-Safe ChartEBS010LR
When the DTC listed bellow is detected, the ECM enters fail-safe mode and the MI lights up.
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.
DTC No. Detected items Engine operating condition in fail-safe mode
P0102
P0103Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
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 (A/T), neutral position (M/T) 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.
Engine operating condition in fail-safe mode Engine speed will not rise more than 2,500 rpm due to the fuel cut

EC-96
[QR (WITH EURO-OBD)]
TROUBLE DIAGNOSIS

2PU/RHeated oxygen sensor 2
heater[Engine is running]

Warm-up condition

Engine speed is below 3,600 rpm after the fol-
lowing conditions are met
–Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for 1
minute under no load0 - 1.0V
[Ignition switch: ON]

Engine stopped
[Engine is running]

Engine speed is above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
3W/BThrottle control motor
relay power supply[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
4GThrottle control motor
(Close)[Ignition switch: ON]

Engine stopped

Shift lever: D (A/T), 1st (M/T)

Accelerator pedal: Fully released0 - 14V
5RThrottle control motor
(Open)[Ignition switch: ON]

Engine stopped

Shift lever: D (A/T), 1st (M/T)

Accelerator pedal: Fully depressed0 - 14V
6*
1YVIAS control solenoid
valve[Engine is running]
Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Engine speed is above 5,000 rpm0 - 1.0V
12 PPower steering pressure
sensor[Engine is running]

Steering wheel is being turned0.5 - 4.0V
[Engine is running]

Steering wheel is not being turned0.4 - 0.8V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB1104E
PBIB1105E

TROUBLE DIAGNOSIS
EC-101
[QR (WITH EURO-OBD)]
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EC

84 L/YElectrical load signal
(Headlamp signal)[Ignition switch: ON]

Lighting switch: 2ND position (placed in LOW
position for models with Xenon headlamp)BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]

Lighting switch: OFFApproximately 0V
85 LG DATA link connector[Ignition switch: ON]

CONSULT-II or GST is disconnectedBATTERY VOLTAGE
(11 - 14V)
86 GY/R CAN communication line[Ignition switch: ON]1.0 - 2.5V
89 G Cooling fan relay (High)[Engine is running]

Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]

Cooling fan is high speed operating0 - 1.0V
90 RSensor power supply
(Accelerator pedal position
sensor 1)[Ignition switch: ON]Approximately 5V
91 BR/YSensor power supply
(Accelerator pedal position
sensor 2)[Ignition switch: ON]Approximately 5V
93 BRElectrical load signal
(Rear window defogger
signal)[Ignition switch: ON]

Rear window defogger switch: ONBATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]

Rear window defogger switch: OFFApproximately 0V
94 G/R CAN communication line[Ignition switch: ON]2.5 - 4.0V
96 LG/B Heater fan switch[Engine is running]

Heater fan switch: ONApproximately 0V
[Engine is running]

Heater fan switch: OFFBATTERY VOLTAGE
(11 - 14V)
97 PU Cooling fan relay (Low)[Ignition switch: ON]

Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]

Cooling fan is operating0 - 1.0V
98 B/WAccelerator pedal position
sensor 2[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully released0.15 - 0.6V
[Ignition switch: ON]

Engine stopped

Accelerator pedal: Fully depressed1.95 - 2.4V
99*
1W/R ASCD steering switch[Ignition switch: ON]

ASCD steering switch: OFFApproximately 4V
[Ignition switch: ON]

MAIN switch: PressedApproximately 0V
[Ignition switch: ON]

CANCEL switch: PressedApproximately 1V
[Ignition switch: ON]

RESUME/ACCELERATE switch: PressedApproximately 3V
[Ignition switch: ON]

SET/COAST switch: PressedApproximately 2V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)