Nissan Primera P12. Instruction — part 354
DTC P2146, P2149 FUEL INJECTOR POWER SUPPLY
EC-601
[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
EBS015BX
21
22
23
24
L
L
W
W
Fuel injector No. 2
Fuel injector No. 2
Fuel injector No. 3
Fuel injector No. 3
[Engine is running]
●
Warm-up condition
●
Idle speed
0 - 9V
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
0 - 9V
40
41
42
43
B/P
B/P
PU/G
PU/G
Fuel injector No. 4
Fuel injector No. 4
Fuel injector No. 1
Fuel injector No. 1
[Engine is running]
●
Warm-up condition
●
Idle speed
0 - 9V
G/R
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
0 - 9V
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage and Pulse Signal)
MBIB0881E
MBIB0882E
MBIB0882E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2146
No. 1 and 4 cylinder fuel
injector power supply cir-
cuit open
An improper voltage signal is sent to ECM
through No. 1 and 4 cylinder fuel injector.
●
Harness or connectors
(The fuel injector circuit is open.)
P2149
No. 2 and 3 cylinder fuel
injector power supply cir-
cuit open
An improper voltage signal is sent to ECM
through No. 2 and 3 cylinder fuel injector.
EC-602
[YD (WITHOUT EURO-OBD)]
DTC P2146, P2149 FUEL INJECTOR POWER SUPPLY
DTC Confirmation Procedure
EBS015BY
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.
TESTING CONDITION
Before performing the following procedure, confirm the ambient temperature is more than -20
°
C (-4
°
F).
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Start engine and let it idle for at least 5 seconds.
4.
If DTC is detected, go to
EC-604, "Diagnostic Procedure"
.
SEF817Y
DTC P2146, P2149 FUEL INJECTOR POWER SUPPLY
EC-603
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
EBS015BZ
MBWA0636E
EC-604
[YD (WITHOUT EURO-OBD)]
DTC P2146, P2149 FUEL INJECTOR POWER SUPPLY
Diagnostic Procedure
EBS015C0
1.
CHECK FUEL INJECOR POWER 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 Diagram.
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 INTERMITTENT INCIDENT
Refer to
EC-408, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Terminal
Cylinder
ECM
Fuel injector
4
3
No.1
5
3
No.2
5
3
No.3
4
3
No.4
Continuity should exist.
MBIB0085E
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