2005 NISSAN X-TRAIL Service Repair Manual

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Page 2009 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual DTC P1272 FUEL PUMP
EC-1605
[YD (WITHOUT EURO-OBD)]
C
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EC

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by C

Page 2010 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-1606
[YD (WITHOUT EURO-OBD)]
DTC P1272 FUEL PUMP

2. PERFORM FUEL PUMP LEARNING VALUE CLEARING
NOTE:
If the DTC is detected because of air mixed with fuel (i.e.: caused by lack of fuel), it may be

Page 2011 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual DTC P1272 FUEL PUMP
EC-1607
[YD (WITHOUT EURO-OBD)]
C
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4. CHECK FUEL PUMP GROUND CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 29 and fuel pump t

Page 2012 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-1608
[YD (WITHOUT EURO-OBD)]
DTC P1272 FUEL PUMP

FUEL PUMP
Refer to EM-171, "FUEL PUMP" .

Page 2013 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual DTC P1273 FUEL PUMP
EC-1609
[YD (WITHOUT EURO-OBD)]
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DTC P1273 FUEL PUMPPFP:16700
DescriptionEBS0123X
To control the amount of the fuel inhalation of the fuel pump, a plunge

DTC P1273 FUEL PUMP
EC-1609
[YD (WITHOUT EURO-OBD)]
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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

Page 2014 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-1610
[YD (WITHOUT EURO-OBD)]
DTC P1273 FUEL PUMP

Wiring DiagramEBS01242
TBWA0574E

Page 2015 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual DTC P1273 FUEL PUMP
EC-1611
[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 C

Page 2016 of 4555

NISSAN X-TRAIL 2005 Service Repair Manual EC-1612
[YD (WITHOUT EURO-OBD)]
DTC P1273 FUEL PUMP

2. PERFORM FUEL PUMP LEARNING VALUE CLEARING
NOTE:
If the DTC is detected because of air mixed with fuel (i.e.: caused by lack of fuel), it may be

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