User Manual - Page 1168

For 2001 XTERRA.

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SEF812J
Component Description
NGEC0909
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the ball valve back and allows
fuel to flow through the injector into the intake manifold. The
amount of fuel injected depends upon the injection pulse duration.
Pulse duration is the length of time the injector remains open. The
ECM controls the injection pulse duration based on engine fuel
needs.
CONSULT-II Reference Value in Data Monitor
Mode
NGEC0910
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
INJ PULSE-B2
INJ PULSE-B1
Engine: After warming up
Air conditioner switch: OFF
Shift lever: N
No-load
Idle 2.4 - 3.7 msec
2,000 rpm 1.9 - 3.3 msec
B/FUEL SCHDL ditto
Idle 1.0 - 1.6 msec
2,000 rpm 0.7 - 1.4 msec
ECM Terminals and Reference Value
NGEC0911
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 ECMs transistor. Use a ground other than the ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
102
104
106
109
111
113
W/B
W/R
W/G
W/L
W/PU
W
Injector No. 1
Injector No. 3
Injector No. 5
Injector No. 2
Injector No. 4
Injector No. 6
[Engine is running]
Warm-up condition
Idle speed
BATTERY VOLTAGE
(11 - 14V)
SEF007V
[Engine is running]
Warm-up condition
Engine speed is 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
SEF008V
INJECTOR
VG33E
Component Description
EC-1168
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