2005 NISSAN X-TRAIL DTC 0123

DTC P1272 FUEL PUMP
EC-1605
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic ProcedureEBS0123U
1. CHECK FUEL TRANSPORT PUMP OPERATION
Perform Diagnostic Procedure for fuel transport pump. Refer to EC-1685
.
OK or NG
OK >> GO TO 2.
NG >> Follow the instruction of Diagnostic Procedure for fuel transport pump.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
10 Y/L Fuel pump power supply[Engine is running]

Warm-up condition

Idle speed0 - 12.5V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0 - 12.5V
29 L Fuel pump[Engine is running]

Warm-up condition

Idle speed0.5 - 1.0V
[Engine is running]

Warm-up condition

Engine speed is 2,000 rpm0.5 - 1.0V
MBIB0885E
MBIB0886E
MBIB0887E
MBIB0888E

DTC P1272 FUEL PUMP
EC-1607
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

4. 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 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK FUEL PUMP
Refer to EC-1607, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> GO TO 8.
6. CHECK FUEL RAIL PRESSURE SENSOR
Refer to EC-1471, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace fuel rail.
7. CHECK INTERMITTENT INCIDENT
Refer to EC-1414, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace.
8. REPLACE FUEL PUMP
1. Replace fuel pump.
2. Perform Fuel Pump Learning Value Clearing. Refer to EC-1370, "
Fuel Pump Learning Value Clearing" .
>>INSPECTION END
Component InspectionEBS012AP
FUEL PUMP
1. Check continuity between fuel supply pump terminals 1 and 2.
2. If NG, replace fuel pump.
Removal and InstallationEBS0123W
FUEL RAIL
Refer to EM-167, "INJECTION TUBE AND FUEL INJECTOR" . Continuity should exist.
Continuity should exist.
SEF807Z

DTC P1273 FUEL PUMP
EC-1609
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

DTC P1273 FUEL PUMPPFP:16700
DescriptionEBS0123X
To control the amount of the fuel inhalation of the fuel pump, a plunger is built into the fuel pump. When the
amount of the fuel inhalation of fuel pump increases, the fuel raises the fuel exhalation pressure. As a result,
the fuel injection pressure is raised. When the load of the engine increases, the ECM sends a signal to the fuel
pump to raise the injection pressure.
CONSULT-II Reference Value in Data Monitor ModeEBS0123Y
Specification data are reference values.
On Board Diagnosis LogicEBS01240
The MI will not light up for this self-diagnosis.
NOTE:

If DTC P1273 is displayed with DTC P0652 or P0653, first perform trouble diagnosis for DTC P0652
or P0653. Refer to EC-1609, "
DTC P1273 FUEL PUMP" .
DTC Confirmation ProcedureEBS01241
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 10 sec-
onds.
4. If DTC is detected, go to EC-1611, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Keep engine speed more than 2,000 rpm for at least 10 seconds.
3. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
4. Perform Diagnostic Test Mode II (Self-diagnostic results) with ECM.
5. If DTC is detected, go to EC-1611, "
Diagnostic Procedure" .
MONITOR ITEM CONDITION SPECIFICATION
PUMP CURRENT

Engine: After warming up

Air conditioner switch: OFF

Shift lever: Neutral position

No-loadIdle 1,700 - 1,900 mA
2,000 rpm 1,600 - 1,800 mA
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1273
1273Fuel pump insufficient flowECM detects the abnormal pulse of fuel pres-
sure.

Fuel pump

Air mixed with fuel

Lack of fuel

Fuel rail pressure sensor

Fuel transport pump operation
SEF817Y

ACC-2
ACCELERATOR CONTROL SYSTEM

ACCELERATOR CONTROL SYSTEMPFP:18005
Removal and InstallationEBS00KP5
REMOVAL
1. Disconnect accelerator pedal position sensor harness connector.
2. Loosen nuts, and remove accelerator pedal assembly.
CAUTION:

Do not disassemble accelerator pedal assembly. Do not remove accelerator pedal position sen-
sor from accelerator pedal assembly.

Avoid impact from dropping etc. during handling.

Be careful to keep accelerator pedal assembly away from water.

Do not adjust adjusting screw (painted white).
INSTALLATION
Installation is the reverse order of removal.
INSPECTION AFTER INSTALLATION

Make sure that accelerator pedal moves smoothly within the whole operation range.

Make sure that accelerator pedal securely returns to the original position.

For the electrical inspection of accelerator pedal position sensor, refer to EC-409, "DTC P2122, P2123
APP SENSOR" (QR20DE and QR25DE) or EC-1099, "DTC P0122, P0123 APP SENSOR" (YD22DDTi).
CAUTION:
When the harness connector of the accelerator pedal position sensor is disconnected, perform
“Accelerator Pedal Released Position Learning”. (QR20DE and QR25DE) Refer to EC-46, "
Acceler-
ator Pedal Released Position Learning" (WITH EURO-OBD) or EC-559, "Accelerator Pedal
Released Position Learning" (WITHOUT EURO-OBD).
NOTE:
In the case of YD22DDTi, it is unnecessary to perform “Accelerator Pedal Released Position Learning”
even when disconnecting the harness connector of the accelerator pedal position sensor.
1. Accelerator pedal assembly
PBIC2412E