Nissan Frontier D22. Instruction — part 359
INJECTOR CIRCUIT
EC-539
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
INJECTOR CIRCUIT
PFP:16600
Component Description
UBS00DD4
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
UBS00DD5
Specification data are reference values.
SEF812J
MONITOR ITEM
CONDITION
SPECIFICATION
INJ PULSE-B1
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: P or N
●
No-load
Idle
2.5 - 3.3 msec
2,000 rpm
2.4 - 3.2 msec
B/FUEL SCHDL
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: P or N
●
No-load
Idle
0.8 - 1.2 msec
2,000 rpm
0.8 - 1.2 msec
EC-540
[KA24DE]
INJECTOR CIRCUIT
Wiring Diagram
UBS00DD6
BBWA0459E
INJECTOR CIRCUIT
EC-541
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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 ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
102
104
109
111
W/B
W/R
W/L
W/PU
Injector No. 1
Injector No. 3
Injector No. 2
Injector No. 4
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
SEF011W
SEF012W
EC-542
[KA24DE]
INJECTOR CIRCUIT
Diagnostic Procedure
UBS00DD7
1.
CHECK OVERALL FUNCTION
With CONSULT-II
1.
Start engine.
2.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
3.
Make sure that each circuit produces a momentary engine
speed drop.
Without CONSULT-II
1.
Start engine.
2.
Listen to each injector operating sound.
Clicking noise should be heard.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
2.
CHECK POWER SUPPLY
1.
Stop engine.
2.
Disconnect injector harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between injector terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
SEF981Z
MEC703B
Voltage
: Battery voltage
SEF271W
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст