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DTC P1260 - P1267 FUEL INJECTOR ADJUSTMENT RESISTOR
EC-1407
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Diagnostic ProcedureEBS0123M
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
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![NISSAN X-TRAIL 2003 Service Repair Manual EC-1408
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DTC P1260 - P1267 FUEL INJECTOR ADJUSTMENT RESISTOR
2. CHECK FUEL INJECTOR ADJUSTMENT RESISTOR POWER SUPPLY CIRCUIT
1. Disconnect fuel injector harness connector of m NISSAN X-TRAIL 2003 Service Repair Manual EC-1408
[YD (WITHOUT EURO-OBD)]
DTC P1260 - P1267 FUEL INJECTOR ADJUSTMENT RESISTOR
2. CHECK FUEL INJECTOR ADJUSTMENT RESISTOR POWER SUPPLY CIRCUIT
1. Disconnect fuel injector harness connector of m](/manual-img/5/57404/w960_57404-1785.png)
EC-1408
[YD (WITHOUT EURO-OBD)]
DTC P1260 - P1267 FUEL INJECTOR ADJUSTMENT RESISTOR
2. CHECK FUEL INJECTOR ADJUSTMENT RESISTOR POWER SUPPLY CIRCUIT
1. Disconnect fuel injector harness connector of malfunctioning
cylinder.
2. Turn ignition switch ON.
3. Check voltage between fuel injector terminal 2 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 FUEL INJECTOR ADJUSTMENT RESISTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between fuel injector terminal 1 and ECM terminal 78.
3. 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 FUEL INJECTOR ADJUSTMENT RESISTOR
Refer to EC-1408, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace fuel injector.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-1260, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS0123N
FUEL INJECTOR ADJUSTMENT RESISTOR
1. Disconnect fuel injector harness connector.
PBIB1896E
Voltage: Approximately 5.3V
MBIB0186E
Continuity should exist.
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DTC P1260 - P1267 FUEL INJECTOR ADJUSTMENT RESISTOR
EC-1409
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2. Check continuity between terminals as shown in the figure.
If NG, replace fuel injector.
Removal and InstallationEBS0123O
FUEL INJECTOR
Refer to EM-157, "INJECTION TUBE AND FUEL INJECTOR" . Continuity should exist.
PBIB0415E
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![NISSAN X-TRAIL 2003 Service Repair Manual EC-1410
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DTC P1268 - P1271 FUEL INJECTOR
DTC P1268 - P1271 FUEL INJECTORPFP:16600
Component DescriptionEBS0126X
The fuel injector is a small, precise solenoid valve. When the NISSAN X-TRAIL 2003 Service Repair Manual EC-1410
[YD (WITHOUT EURO-OBD)]
DTC P1268 - P1271 FUEL INJECTOR
DTC P1268 - P1271 FUEL INJECTORPFP:16600
Component DescriptionEBS0126X
The fuel injector is a small, precise solenoid valve. When the](/manual-img/5/57404/w960_57404-1787.png)
EC-1410
[YD (WITHOUT EURO-OBD)]
DTC P1268 - P1271 FUEL INJECTOR
DTC P1268 - P1271 FUEL INJECTORPFP:16600
Component DescriptionEBS0126X
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the needle valve back and
allows fuel to flow through the fuel injector into the intake cylinder.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
CONSULT-II Reference Value in Data Monitor ModeEBS0126Y
Specification data are reference values.
ECM Terminals and Reference ValueEBS0126Z
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.
PBIB0465E
MONITOR ITEM CONDITION SPECIFICATION
MAIN INJ WID
Engine: After warming up
Shift lever: Neutral position
Idle speedNo-load 0.68 - 0.78 msec
Blower fan switch: ON
Rear window defogger switch: ON0.78 - 0.88 msec
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
4
5W/B
G/BFuel injector power supply
(For cylinder No. 1 and 4)
Fuel injector power supply
(For cylinder No. 2 and 3)[Engine is running]
Warm-up condition
Idle speed5 - 10V
[Engine is running]
Warm-up condition
Engine speed is 2,000 rpm5 - 10V
MBIB0883E
MBIB0884E
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EC-1411
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosi NISSAN X-TRAIL 2003 Service Repair Manual DTC P1268 - P1271 FUEL INJECTOR
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosi](/manual-img/5/57404/w960_57404-1788.png)
DTC P1268 - P1271 FUEL INJECTOR
EC-1411
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosis LogicEBS01270
The MI will not light up for these self-diagnoses.
21
22
23
24G/R
GY/L
G/R
GY/LFuel injector No. 2
Fuel injector No. 2
Fuel injector No. 3
Fuel injector No. 3[Engine is running]
Warm-up condition
Idle speed0 - 9V
[Engine is running]
Warm-up condition
Engine speed is 2,000 rpm0 - 9V
40
41
42
43G/R
GY/L
G/R
GY/LFuel injector No. 4
Fuel injector No. 4
Fuel injector No. 1
Fuel injector No. 1[Engine is running]
Warm-up condition
Idle speed0 - 9V
[Engine is running]
Warm-up condition
Engine speed is 2,000 rpm0 - 9V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
MBIB0881E
MBIB0882E
MBIB0881E
MBIB0882E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1268 No. 1 cylinder fuel injectorThe valve built into No. 1 cylinder fuel injector is
not closed properly (stuck open) when the injec-
tor is not energized.
Fuel injector P1269 No. 2 cylinder fuel injectorThe valve built into No. 2 cylinder fuel injector is
not closed properly (stuck open) when the injec-
tor is not energized.
P1270 No. 3 cylinder fuel injectorThe valve built into No. 3 cylinder fuel injector is
not closed properly (stuck open) when the injec-
tor is not energized.
P1271 No. 4 cylinder fuel injectorThe valve built into No. 4 cylinder fuel injector is
not closed properly (stuck open) when the injec-
tor is not energized.
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EC-1412
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DTC P1268 - P1271 FUEL INJECTOR
DTC Confirmation ProcedureEBS01271
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driv-
ing.
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, and select “DATA MONITOR” mode
with CONSULT-II.
2. Restart engine and let it idle for about 15 minutes.
3. If DTC is detected, go to EC-1414, "
Diagnostic Procedure" .
If DTC is not detected, go to next step.
4. Drive vehicle and maintain the following conditions for at least
60 seconds.
5. If DTC is detected, go to EC-1414, "
Diagnostic Procedure" .
CKPS·RPM 700 - 2000 rpm (A constant rotation is maintained)
COOLAN TEMP/S Less than 75°C (167°F)
Shift lever Suitable position
Accelerator pedal Hold the accelerator pedal as steady as possible.
PBIB2156E
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DTC P1268 - P1271 FUEL INJECTOR
EC-1413
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Wiring DiagramEBS01272
TBWA0569E
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![NISSAN X-TRAIL 2003 Service Repair Manual EC-1414
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DTC P1268 - P1271 FUEL INJECTOR
Diagnostic ProcedureEBS01273
1. CHECK FUEL INJECOR POWER SUPPLY CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect NISSAN X-TRAIL 2003 Service Repair Manual EC-1414
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DTC P1268 - P1271 FUEL INJECTOR
Diagnostic ProcedureEBS01273
1. CHECK FUEL INJECOR POWER SUPPLY CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect](/manual-img/5/57404/w960_57404-1791.png)
EC-1414
[YD (WITHOUT EURO-OBD)]
DTC P1268 - P1271 FUEL INJECTOR
Diagnostic ProcedureEBS01273
1. CHECK FUEL INJECOR POWER SUPPLY CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Disconnect fuel injector harness connector.
4. Check harness continuity between the following terminals corre-
sponding to the malfunctioning cylinder. Refer to Wiring Dia-
gram.
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 ECM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between the following terminals corresponding to the malfunctioning cylinder.
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 INJECTOR-I
Refer to EC-1415, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace fuel injector.
DTCTerminal
Cylinder
ECM Fuel injector
P1268 4 3 No.1
P1269 5 3 No.2
P1270 5 3 No.3
P1271 4 3 No.4
Continuity should exist.
PBIB1896E
DTCTerminal
Cylinder
ECM Fuel injector
P1268 42, 43 4 No.1
P1269 21, 22 4 No.2
P1270 23, 24 4 No.3
P1271 40, 41 4 No.4
Continuity should exist.