Infiniti G20 (P11). Manual — part 296
SEF237X
Component Inspection
=NCEC0326
IGNITION COIL
NCEC0326S01
1.
Disconnect ignition coil harness connector.
2.
Check resistance as shown in the figure.
SEF238X
3.
For checking secondary coil, remove distributor cap.
4.
Check resistance between ignition coil harness connector ter-
minal 8 and coil tower metal tip 9 (secondary terminal) on the
distributor head.
Terminal
Resistance [at 25°C (77°F)]
7 - 8 (Primary coil)
Approximately 0.8
Ω
8 - secondary terminal on distributor
head (Secondary coil)
Approximately 16 k
Ω
If NG, replace distributor.
SEF943X
POWER TRANSISTOR
NCEC0326S02
1.
Disconnect distributor harness connector.
2.
Check power transistor resistance between terminals 5 and 7.
Terminals
Resistance
Result
5 and 7
Except 0
Ω
OK
0
Ω
NG
If NG, replace distributor.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
IGNITION SIGNAL
Component Inspection
EC-595
SEF138X
Component Description
NCEC0435
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 needle 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
NCEC0436
MONITOR ITEM
CONDITION
SPECIFICATION
INJ PULSE-B1
I
Engine: After warming up
I
Air conditioner switch: OFF
I
Shift lever: “N”
I
No-load
Idle
2.4 - 3.2 msec
2,000 rpm
1.9 - 2.8 msec
B/FUEL SCHDL
I
Engine: After warming up
I
Air conditioner switch: OFF
I
Shift lever: “N”
I
No-load
Idle
1.0 - 1.6 msec
2,000 rpm
0.7 - 1.3 msec
ECM Terminals and Reference Value
NCEC0437
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.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
101
103
105
107
R/B
Y/B
G/B
L/B
Injector No. 1
Injector No. 2
Injector No. 3
Injector No. 4
[Engine is running]
I
Warm-up condition
I
Idle speed
BATTERY VOLTAGE
(11 - 14V)
SEF011W
[Engine is running]
I
Warm-up condition
I
Engine speed is 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
SEF012W
INJECTOR
Component Description
EC-596
Wiring Diagram
NCEC0434
TEC724
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Wiring Diagram
EC-597
Diagnostic Procedure
NCEC0438
1
CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
SEF190Y
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.
MEC703B
Clicking noise should be heard.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 2.
INJECTOR
Diagnostic Procedure
EC-598
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