Nissan Primera P12. Manual — part 272
DTC P1268 - P1271 FUEL INJECTOR
EC-273
[YD (WITH EURO-OBD)]
C
D
E
F
G
H
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J
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M
A
EC
DTC Confirmation Procedure
EBS013R3
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-275, "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-275, "Diagnostic Procedure"
.
WITHOUT CONSULT-II
Follow the procedure “WITH CONSULT-II” above.
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
EC-274
[YD (WITH EURO-OBD)]
DTC P1268 - P1271 FUEL INJECTOR
Wiring Diagram
EBS013R4
MBWA0634E
DTC P1268 - P1271 FUEL INJECTOR
EC-275
[YD (WITH EURO-OBD)]
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A
EC
Diagnostic Procedure
EBS013R5
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-276, "Component Inspection"
.
OK or NG
OK
>> GO TO 4.
NG
>> Replace fuel injector.
DTC
Terminal
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.
MBIB0085E
DTC
Terminal
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.
EC-276
[YD (WITH EURO-OBD)]
DTC P1268 - P1271 FUEL INJECTOR
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-273, "DTC Confirmation Procedure"
.
8.
Is another DTC displayed?
With GST
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 MODE4 with GST.
6.
Touch “ERASE”.
7.
Perform
EC-273, "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-75, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS013R6
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
EBS013R7
FUEL INJECTOR
Refer to
EM-39, "INJECTION TUBE AND FUEL INJECTOR"
Continuity should exist.
PBIB0406E
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