NISSAN X-TRAIL 2003 Service Repair Manual

DTC P1275 FUEL PUMP
EC-1433
[YD (WITHOUT EURO-OBD)]
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosis LogicEBS0124I
DTC Confirmation ProcedureEBS0124J
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Keep engine speed more than 2,000 rpm for at least 60 sec-
onds.
4. If DTC is detected, go to EC-1435, "
Diagnostic Procedure" .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1275 Fuel pump exchangeFuel pressure is too much higher than the target
value.

Harness or connectors
(The fuel pump circuit is open or
shorted.)

Fuel pump

Fuel rail pressure sensor
SEF817Y

EC-1434
[YD (WITHOUT EURO-OBD)]
DTC P1275 FUEL PUMP

Wiring DiagramEBS0124K
TBWA0574E

DTC P1275 FUEL PUMP
EC-1435
[YD (WITHOUT EURO-OBD)]
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Diagnostic ProcedureEBS0124L
1. CHECK ECM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector and fuel pump harness
connectors.
3. Check harness continuity between ECM terminal 10 and fuel
pump terminal 2.
Refer to Wiring Diagram.
4. 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 FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 29 and fuel pump terminal 1.
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 FUEL RAIL PRESSURE SENSOR
Refer to EC-1312, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace fuel rail.
4. CHECK FUEL PUMP
Refer to EC-1436, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. REPLACE FUEL PUMP
1. Replace fuel pump.
2. Perform Fuel Pump Learning Valve Clearing. Refer to EC-1221, "
Fuel Pump Learning Value Clearing" .
>>INSPECTION END
6. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.
PBIB1943E
Continuity should exist.

EC-1436
[YD (WITHOUT EURO-OBD)]
DTC P1275 FUEL PUMP

Component InspectionEBS0124M
FUEL PUMP
1. Check continuity between fuel pump terminals 1 and 2.
2. If NG, replace fuel pump.
Removal and InstallationEBS0124N
FUEL PUMP
Refer to EM-161, "FUEL PUMP" . Continuity should exist.
SEF807Z

DTC P2135 APP SENSOR
EC-1437
[YD (WITHOUT EURO-OBD)]
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DTC P2135 APP SENSORPFP:18002
DescriptionEBS0124O
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensors detect the accelera-
tor pedal position and sends a signal to the ECM. The ECM uses the
signal to determine the amount of fuel to be injected.
CONSULT-II Reference Value in Data Monitor ModeEBS0124P
Specification data are reference values.
*: These signals are converted by ECM internally. Thus, these differ from ECM terminals voltage.
ECM Terminals and Reference ValueEBS0124Q
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.
PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL POS SEN*

Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.2 - 0.7V
Accelerator pedal: Fully depressed 3.9 - 4.9V
ACCEL SEN 2*

Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.1 - 0.4V
Accelerator pedal: Fully depressed 1.9 - 2.4V
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
82 BAccelerator pedal position
sensor 1 power supply[Ignition switch ON]Approximately 5.3V
83 WAccelerator pedal position
sensor 1[Ignition switch ON]

Engine stopped

Accelerator pedal: Fully released0.5 - 1.0V
[Ignition switch ON]

Engine stopped

Accelerator pedal: Fully depressed4.2 - 5.2V
84 RAccelerator pedal position
sensor 1 ground[Ignition switch ON]Approximately 0.3V
85 —Sensor ground
(Accelerator pedal posi-
tion sensor shield circuit)[Ignition switch ON]Approximately 0.3V
90 LAccelerator pedal position
sensor 2 power supply[Ignition switch ON]Approximately 5.3V

EC-1438
[YD (WITHOUT EURO-OBD)]
DTC P2135 APP SENSOR

On Board Diagnosis LogicEBS0124R
The MI will not light up for this self-diagnosis.
DTC Confirmation ProcedureEBS0124S
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. Depress accelerator pedal slowly spending 5 seconds, and then
release it slowly spending 5 seconds.
5. If DTC is detected, go to EC-1440, "
Diagnostic Procedure" .
91 GAccelerator pedal position
sensor 2[Ignition switch ON]

Engine stopped

Accelerator pedal: Fully released0.4 - 0.7V
[Ignition switch ON]

Engine stopped

Accelerator pedal: Fully depressed2.2 - 2.7V
92 YAccelerator pedal position
sensor 2 ground[Ignition switch ON]Approximately 0.3V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2135Accelerator pedal position
sensor 1, 2 signal correla-
tionThe correlation between APP sensor 1 signal
and APP sensor 2 signal is out of the normal
range.

Harness or connectors
(The APP sensor circuit is open or
shorted.)

Accelerator pedal position sensor
SEF817Y

DTC P2135 APP SENSOR
EC-1439
[YD (WITHOUT EURO-OBD)]
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Wiring DiagramEBS0124T
TBWA0730E

EC-1440
[YD (WITHOUT EURO-OBD)]
DTC P2135 APP SENSOR

Diagnostic ProcedureEBS0124U
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten engine ground screws. Refer to EC-1267, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
PBIB2020E

DTC P2135 APP SENSOR
EC-1441
[YD (WITHOUT EURO-OBD)]
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2. CHECK APP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness
connector.
2. Turn ignition switch ON.
3. Check voltage between APP sensor terminals 4, 6 and ground
with CONSULT-II or tester.
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 APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between APP sensor terminals 3 and ECM terminal 84, APP sensor terminal 1
and ECM terminal 92.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 83 and APP sensor terminal 5, ECM terminal 91 and
APP sensor terminal 2.
Refer to Wiring Diagram.
2. 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 or connectors.
5. CHECK APP SENSOR
Refer to EC-1442, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace accelerator pedal assembly.
PBIB1893E
Voltage: Approximately 5.3V
PBIB0560E
Continuity should exist.
Continuity should exist.

EC-1442
[YD (WITHOUT EURO-OBD)]
DTC P2135 APP SENSOR

6. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS0124V
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 83 (APP sensor 1 sig-
nal), 91 (APP sensor 2 signal) and body ground under the fol-
lowing conditions.
4. If NG, replace accelerator pedal assembly.
Removal and InstallationEBS0124W
ACCELERATOR PEDAL
Refer to ACC-2, "ACCELERATOR CONTROL SYSTEM" .
Terminal Accelerator pedal Voltage
83
(Accelerator pedal position
sensor 1)Fully released 0.5 - 1.0V
Fully depressed 4.2 - 5.2V
91
(Accelerator pedal position
sensor 2)Fully released 0.4 - 0.7V
Fully depressed 2.2 - 2.7V
MBIB0615E