2001 NISSAN X-TRAIL check engine

EC-1464
[YD]
DTC P0120 ACCELERATOR PEDAL POSITION SENSOR
3. CHECK ACCELERATOR PEDAL POSITION SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect accelerator work unit harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between accelerator work unit terminals 7, 1 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair harness or connectors.
5. CHECK ACCELERATOR PEDAL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screw.
3. Check harness continuity between accelerator work unit termi-
nals 2, 8 and engine ground. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0379E
Voltage: Approximately 5V
PBIB0364E
Continuity should exist.
PBIB0385E

EC-1468
[YD]
DTC P0190 COMMON RAIL FUEL PRESSURE SENSOR
DTC P0190 COMMON RAIL FUEL PRESSURE SENSOR
PFP:16638
DescriptionEBS004RD
The common rail fuel pressure sensor is placed to the common rail. It measures the fuel pressure in the com-
mon rail. The sensor sends voltage signal to the ECM. As the pressure increases, the voltage rises.
The ECM controls the fuel pressure in the common rail by the suction control valve. The ECM uses the signal
from common rail fuel pressure sensor as a feedback signal.
CONSULT-II Reference Value in Data Monitor ModeEBS008YH
Specification data are reference values.
ECM Terminals and Reference ValueEBS008YI
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicEBS004RE
DTC Confirmation ProcedureEBS004RF
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If DTC is detected, go to EC-1470, "
Diagnostic Procedure" .
MONITOR CONDITION SPECIFICATOIN
ACT CR PRESS
●Engine: After warming up
●Air conditioner switch: OFF
●Shift lever: Neutral position
●No-loadIdle 30 - 40 MPa
2,000 rpm 40 - 50 MPa
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A23 B Sensor's ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
A27 W Sensor's power supply[Ignition switch "ON"]Approximately 5V
B13
B14Y/R
Y/RCommon rail fuel pressure
sensor[Engine is running]
●Warm-up condition
●Idle speed1.6 - 1.8V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm1.8 - 2.0V
DTC Malfunction is detected when ... Check Items (Possible Cause)
P0190
●An excessively high or low voltage from the sensor
is entered to ECM.●Harness or connectors (The sensor circuit is open
or shorted.)
●Common rail fuel pressure sensor
SEF817Y

EC-1470
[YD]
DTC P0190 COMMON RAIL FUEL PRESSURE SENSOR
Diagnostic Procedure
EBS004RH
1. CHECK COMMON RAIL FUEL PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect common rail fuel pressure sensor harness connec-
tor.
3. Turn ignition switch “ON”.
4. Check voltage between common rail fuel pressure sensor termi-
nal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 2.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
2. CHECK COMMON RAIL FUEL PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Check harness continuity between common rail fuel pressure sensor terminal 3 and engine ground. Refer
to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check harness for open or short between ECM and common rail fuel pressure sensor.
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0382E
Voltage: Approximately 5V
PBIB0405E
Continuity should exist.

DTC P0190 COMMON RAIL FUEL PRESSURE SENSOR
EC-1471
[YD]
C
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EC
4.CHECK COMMON RAIL FUEL PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminals B13, B14 and common rail fuel pressure sensor termi-
nal 2. Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness connectors.
5.CHECK COMMON RAIL FUEL PRESSURE SENSOR
Refer to EC-1471, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace common rail.
6.CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS004RI
COMMON RAIL FUEL PRESSURE SENSOR
1. Reconnect harness connector disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminals B13, B14 (Common rail
fuel pressure sensor signal) and ground under the following con-
ditions.
4. If the voltage is out of specification, disconnect common rail fuel
pressure sensor harness connector and connect it again. Then
repeat above check.
5. If NG, replace common rail.
Removal and InstallationEBS008YJ
COMMON RAIL
Refer to EM-144, "INJECTION TUBE AND FUEL INJECTOR" . Continuity should exist.
Condition Voltage V
Idle 1.6 - 1.8
2,000 rpm 1.8 - 2.0
PBIB0588E

DTC P0201 - P0204 FUEL INJECTOR
EC-1473
[YD]
C
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F
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MA
EC
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosis LogicEBS008X3
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A1
A2
A3
A4L/W
Y/PU
PU
YEDU drive No. 2
EDU drive No. 4
EDU drive No. 3
EDU drive No. 1[Engine is running]
●Warm-up condition
●Idle speed0 - 4V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm0 - 4V
A8
A9R
RPower supply for ECM[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
A29 W/PU EDU injector check signal[Engine is running]
●Warm-up condition
●Idle speed1 - 5V
[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm1 - 5V
D24
D26G
GECM relay (self-shutoff)[Ignition switch “ON”]
[Ignition switch “OFF”]
●For a few seconds after turning ignition
switch “OFF”Approximately 0V
[Ignition switch “OFF”]
●A few seconds passed after turning ignition
switch “OFF”BATTERY VOLTAGE
(11 - 14V)
PBIB0387E
PBIB0388E
PBIB0391E
PBIB0392E
DTC Malfunction is detected when .... Check Items (Possible cause)
P0201
●Injector No.1 does not operate normally.●Harness or connectors
(Injector circuit is open or shorted.)
●Electronic drive unit
●Fuel injector P0202
●Injector No.2 does not operate normally.
P0203
●Injector No.3 does not operate normally.
P0204
●Injector No.4 does not operate normally.

EC-1478
[YD]
DTC P0201 - P0204 FUEL INJECTOR
4. CHECK FUEL INJECTOR-I
Refer to EC-1478, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace fuel injector.
5. CHECK FUEL INJECTOR-II
1. Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2. Install fuel injectors to different cylinder.
3. Reconnect ECM harness connector, EDU harness connector and fuel injector harness connector.
4. Erase DTC. Refer to EC-1406, "
HOW TO ERASE DTC" .
5. Select “DATA MONITOR” mode with CONSULT-II.
6. Start engine and warm it up to the normal operating temperature.
7. Check DTC.
Same DTC is detected. >>Replace EDU.
Another DTC is detected. >>Replace fuel injector of malfunctioning cylinder.
No DTC is detected. >>GO TO 6.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS008YK
FUEL INJECTOR
1. Disconnect fuel injector.
2. Check continuity between terminals as shown in the figure.
3. If NG, replace fuel injector.
Removal and InstallationEBS008YL
FUEL INJECTOR
Refer to EM-144, "INJECTION TUBE AND FUEL INJECTOR" . Continuity should exist.
PBIB0406E

EC-1480
[YD]
DTC P0335 CRANKSHAFT POSISTION SENSOR (TDC)
On Board Diagnosis Logic
EBS004RT
DTC Confirmation ProcedureEBS004RU
Before performing the following procedure, confirm that battery voltage is more than 10V.
WITH CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2. Crank engine for at least 1 second.
3. Start engine and run it for at least 2 seconds at idle speed.
4. If DTC is detected, go to EC-1482, "
Diagnostic Procedure" .
DTC Malfunction is detected when ... Check Items (Possible Cause)
P0335
●An improper voltage signal from the sensor is sent
to ECM during running and cranking.●Harness or connectors
(The sensor circuit is open or shorted.)
●Crankshaft position sensor (TDC)
SEF817Y

EC-1482
[YD]
DTC P0335 CRANKSHAFT POSISTION SENSOR (TDC)
Diagnostic Procedure
EBS004RW
1. CHECK CRANKSHAFT POSITION SENSOR (TDC) GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
3. Disconnect crankshaft position sensor (TDC) harness connector
and ECM harness connector.
4. Check harness continuity between ECM terminal B20 and
crankshaft position sensor (TDC) terminal 1. Refer to Wiring
Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 2.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
2. CHECK CRANKSHAFT POSITION SENSOR (TDC) INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between crankshaft position sensor (TDC) terminal 2 and ECM terminal B21.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK CRANKSHAFT POSITION SENSOR (TDC)
Refer to EC-1482, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace crankshaft position sensor (TDC).
4. CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS008YW
CRANKSHAFT POSITION SENSOR(TDC)
1. Loosen the fixing bolt of the sensor.
2. Disconnect crankshaft position sensor (TDC) harness connector.
PBIB0385E
Continuity should exist.
PBIB0416E
Continuity should exist.