Nissan Primera P12. Manual — part 347
DTC P1268 - P1271 FUEL INJECTOR
EC-573
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
4.
CHECK FUEL INJECTOR-II
With CONSULT-II
1.
Remove two fuel injectors of malfunctioning cylinder and another cylinder.
2.
Install fuel injectors to different cylinder.
3.
Reconnect ECM harness connector and fuel injector harness connector.
4.
Turn ignition switch ON.
5.
Select “SELF DIAG RESULTS” mode with CONSULT-II.
6.
Touch “ERASE”.
7.
Perform
EC-570, "DTC Confirmation Procedure"
.
8.
Is another DTC displayed?
Yes or No
Yes
>> Replace fuel injector of malfunctioning cylinder.
No
>> GO TO 5.
5.
CHECK INTERMITTENT INCIDENT
Refer to
EC-408, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS015AJ
FUEL INJECTOR
1.
Disconnect fuel injector.
2.
Check continuity between terminals as shown in the figure.
3.
If NG, replace fuel injector.
Removal and Installation
EBS015AK
FUEL INJECTOR
Refer to
EM-39, "INJECTION TUBE AND FUEL INJECTOR"
Continuity should exist.
PBIB0406E
EC-574
[YD (WITHOUT EURO-OBD)]
DTC P1272 FUEL PUMP
DTC P1272 FUEL PUMP
PFP:16700
Description
EBS015AL
When the fuel pressure in fuel rail increases to excessively high, fuel
pressure relief valve opens to carry excess fuel to the return hose.
CONSULT-II Reference Value in Data Monitor Mode
EBS015AM
Specification data are reference values.
ECM Terminals and Reference Value
EBS015AN
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.
MBIB0924E
MONITOR ITEM
CONDITION
SPECIFICATION
PUMP CURRENT
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: Neutral position
●
No-load
Idle
1,700 - 1,900 mA
2,000 rpm
1,600 - 1,800 mA
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage and Pulse Signal)
10
Y/L
Fuel pump power supply
[Engine is running]
●
Warm-up condition
●
Idle speed
0 - 12.5V
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
0 - 12.5V
MBIB0885E
MBIB0886E
DTC P1272 FUEL PUMP
EC-575
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosis Logic
EBS015AO
The MI will not light up for this self-diagnosis.
DTC Confirmation Procedure
EBS015AP
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.
Start engine and keep engine speed more than 4,000 rpm for at
least 5 seconds, then release the accelerator pedal.
4.
If DTC is detected, go to
EC-577, "Diagnostic Procedure"
.
29
L
Fuel pump
[Engine is running]
●
Warm-up condition
●
Idle speed
0.5 - 1.0V
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
0.5 - 1.0V
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage and Pulse Signal)
MBIB0887E
MBIB0888E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1272
Fuel rail pressure relief
valve open
Fuel rail pressure relief valve is open
because of fuel pressure control system
malfunction.
●
Harness or connectors
(Fuel pump circuit is open or shorted.)
●
Fuel pump
●
Fuel rail pressure sensor
●
Air mixed with fuel
●
Lack of fuel
SEF817Y
EC-576
[YD (WITHOUT EURO-OBD)]
DTC P1272 FUEL PUMP
Wiring Diagram
EBS015AQ
MBWA0396E
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