Nissan Almera Tino V10. Manual — part 598
EC-1218
[YD (WITH EURO-OBD)]
DTC P2146, P2149 FUEL INJECTOR POWER SUPPLY
Diagnostic Procedure
EBS013HB
1.
CHECK FUEL INJECOR POWER CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect fuel injector harness connector.
3.
Disconnect ECM 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-1002, "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.
MBIB0635E
DTC P2147, P2148 FUEL INJECTOR CIRCUIT
EC-1219
[YD (WITH EURO-OBD)]
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EC
DTC P2147, P2148 FUEL INJECTOR CIRCUIT
PFP:16600
Component Description
EBS013HC
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 Mode
EBS013HD
Specification data are reference values.
ECM Terminals and Reference Value
EBS013HE
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.
PBIB0465E
MONITOR ITEM
CONDITION
SPECIFICATION
MAIN INJ WID
●
Engine: After warming up
●
Shift lever: Neutral position
●
Idle speed
No-load
0.68 - 0.78 msec
Blower fan switch: ON
Rear window defogger switch: ON
0.78 - 0.88 msec
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA
(DC Voltage and Pulse Signal)
4
5
O/B
B
Fuel 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 speed
5 - 10V
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
5 - 10V
MBIB0883E
MBIB0884E
EC-1220
[YD (WITH EURO-OBD)]
DTC P2147, P2148 FUEL INJECTOR CIRCUIT
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
On Board Diagnosis Logic
EBS013HF
21
22
23
24
L
PU/W
L
PU/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
PU/W
B/P
PU/W
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
[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
MBIB0881E
MBIB0882E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2147
Fuel injector circuit low input
ECM detects the fuel injector circuit is shorted to
ground.
●
Harness or connectors
(The fuel injector circuit is shorted.)
P2148
Fuel injector circuit high input
ECM detects the fuel injector circuit is shorted to
power.
DTC P2147, P2148 FUEL INJECTOR CIRCUIT
EC-1221
[YD (WITH EURO-OBD)]
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EC
DTC Confirmation Procedure
EBS013HG
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 let it idle for at least 5 seconds.
4.
If 1st trip DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF817Y
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