![INFINITI FX35 2008 Service Manual
EC-334
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DTC P0420, P0430 THREE
WAY CATALYST FUNCTION
OK or NG
OK >> GO TO 5.
NG >> Follow the EC-80, "
Basic Inspection".
5.CHECK FUEL INJECTOR
1. Stop engine and then INFINITI FX35 2008 Service Manual
EC-334
< SERVICE INFORMATION >[VQ35DE]
DTC P0420, P0430 THREE
WAY CATALYST FUNCTION
OK or NG
OK >> GO TO 5.
NG >> Follow the EC-80, "
Basic Inspection".
5.CHECK FUEL INJECTOR
1. Stop engine and then](/manual-img/42/57017/w960_57017-1573.png)
EC-334
< SERVICE INFORMATION >[VQ35DE]
DTC P0420, P0430 THREE
WAY CATALYST FUNCTION
OK or NG
OK >> GO TO 5.
NG >> Follow the EC-80, "
Basic Inspection".
5.CHECK FUEL INJECTOR
1. Stop engine and then turn ignition switch ON.
2. Check voltage between ECM terminals 21, 22, 23, 40, 41, 42 and ground with CONSULT-III or tester.
Refer to Wiring Diagram for fuel injector, EC-553, "
Wiring Dia-
gram".
OK or NG
OK >> GO TO 6.
NG >> Perform EC-554, "
Diagnosis Procedure".
6.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Reconnect ECM harness connector disconnected.
3. Remove fuel pump fuse in IPDM E/R to release fuel pressure. NOTE:
Do not use CONSULT-III to releas e fuel pressure, or fuel pres-
sure applies again during the following procedure.
4. Start engine.
5. After engine stalls, crank it two or three times to release all fuel
pressure.
6. Turn ignition switch OFF.
7. Remove all ignition coil harness connectors to avoid the electri-
cal discharge from the ignition coils.
8. Remove ignition coil and spark plug of the cylinder to be
checked.
9. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
10. Connect spark plug and harness connector to ignition coil.
11. Fix ignition coil using a rope etc. with gap of 13 - 17 mm between the edge of the spark plug and grounded metal portion
as shown in the figure.
12. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded metal por-
tion.
CAUTION:
Do not approach to the spar k plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the el ectrical discharge voltage
becomes 20kV or more.
It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
OK or NG
Items Specifications
Target idle speed 650 ± 50 rpm (in P or N position)
Ignition timing 15 ± 5 ° BTDC (in P or N position)
Voltage: Battery voltage
PBIB2250E
Spark should be generated.
PBIB1603E
PBIB2325E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
![INFINITI FX35 2008 Service Manual
DTC P0420, P0430 THREE WAY CATALYST FUNCTION
EC-335
< SERVICE INFORMATION > [VQ35DE]
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OK >> GO TO 10.
NG >> GO TO 7.
7.CHECK FUNCTION OF
IGNITION COIL-II
1. Turn ignit INFINITI FX35 2008 Service Manual
DTC P0420, P0430 THREE WAY CATALYST FUNCTION
EC-335
< SERVICE INFORMATION > [VQ35DE]
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OK >> GO TO 10.
NG >> GO TO 7.
7.CHECK FUNCTION OF
IGNITION COIL-II
1. Turn ignit](/manual-img/42/57017/w960_57017-1574.png)
DTC P0420, P0430 THREE WAY CATALYST FUNCTION
EC-335
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OK >> GO TO 10.
NG >> GO TO 7.
7.CHECK FUNCTION OF
IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a known-good spark plug.
3. Crank engine for about 3 seconds, and recheck whet her spark is generated between the spark plug and
the grounded metal portion.
OK or NG
OK >> GO TO 8.
NG >> Check ignition coil, power transistor and their circuits. Refer to EC-569
.
8.CHECK SPARK PLUG
Check the spark plugs and check for fouling, etc.
OK or NG
OK >> GO TO 9.
NG >> Repair or replace spark plug (s) with standard type one (s). For spark plug type ignition coil. Refer to MA-17,
"Changing Spark Plugs (Platinum-Tipped Type)".
9.CHECK FUNCTION OF IGNITION COIL-III
1. Reconnect the initial spark plugs.
2. Crank engine for about 3 seconds, and recheck whet her spark is generated between the spark plug and
the grounded portion.
OK or NG
OK >> INSPECTION END
NG >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to MA-17, "
Changing
Spark Plugs (Platinum-Tipped Type)".
10.CHECK FUEL INJECTOR
1. Turn ignition switch OFF.
2. Remove fuel injector assembly. Refer to EM-45
.
Keep fuel hose and all fuel injectors connected to fuel injector gallery.
3. Disconnect all ignition coil harness connectors.
4. Reconnect all fuel injector harness connectors disconnected.
5. Turn ignition switch ON. Make sure fuel does not drip from fuel injector.
OK or NG
OK (Does not drip.)>>GO TO 11.
NG (Drips.)>>Replace the fuel injector(s) from which fuel is dripping.
11 .CHECK INTERMITTENT INCIDENT
Refer to EC-139
.
Trouble is fixed.>> INSPECTION END
Trouble is not fixed.>>Replace three way catalyst assembly. Spark should be generated.
SEF156I
Spark should be generated.
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
![INFINITI FX35 2008 Service Manual
IGNITION SIGNALEC-579
< SERVICE INFORMATION > [VQ35DE]
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3. Check resistance between ignition coil terminals as follows.
4. If NG, Replace ignition coil with power trans INFINITI FX35 2008 Service Manual
IGNITION SIGNALEC-579
< SERVICE INFORMATION > [VQ35DE]
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3. Check resistance between ignition coil terminals as follows.
4. If NG, Replace ignition coil with power trans](/manual-img/42/57017/w960_57017-1818.png)
IGNITION SIGNALEC-579
< SERVICE INFORMATION > [VQ35DE]
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3. Check resistance between ignition coil terminals as follows.
4. If NG, Replace ignition coil with power transistor.
If OK, go to next step.
5. Turn ignition switch OFF.
6. Reconnect all harness connectors disconnected.
7. Remove fuel pump fuse in IPDM E/R to release fuel pressure. NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pres-
sure applies again during the following procedure.
8. Start engine.
9. After engine stalls, crank it two or three times to release all fuel
pressure.
10. Turn ignition switch OFF.
11. Remove ignition coil harness connectors to avoid the electrical
discharge from the ignition coils.
12. Remove ignition coil and spark plug of the cylinder to be
checked.
13. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
14. Connect spark plug and harness connector to ignition coil.
15. Fix ignition coil using a rope etc. with gap of 13 - 17 mm between the edge of the spark plug and grounded metal portion
as shown in the figure.
16. Crank engine for about 3 seconds, and check whether spark is generated between the spark plug and the grounded part.
CAUTION:
Do not approach to the spar k plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the el ectrical discharge voltage
becomes 20kV or more.
It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm or less, the spark might be generated even if the coil is malfunc-
tioning.
17. If NG, Replace ignition coil with power transistor.
CONDENSER
1. Turn ignition switch OFF.
2. Disconnect condenser harness connector.
3. Check resistance between condenser terminals 1 and 2.
Terminal No. (Polarity) Resistance Ω [at 25 °C (77 °F)]
1 and 2 Except 0 or ∞
1 and 3 Except 0
2 and 3
Spark should be generated.
PBIB0847E
PBIB1603E
PBIB2325E
Resistance: Above 1 M Ω [at 25 °C (77 °F)]
PBIB0794E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
![INFINITI FX35 2008 Service Manual
EC-666
< SERVICE INFORMATION >[VK45DE]
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
Trouble Diagnosis IntroductionINFOID:0000000001326523
INTRODUCTION
The engine has an ECM to control major systems such as fu INFINITI FX35 2008 Service Manual
EC-666
< SERVICE INFORMATION >[VK45DE]
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
Trouble Diagnosis IntroductionINFOID:0000000001326523
INTRODUCTION
The engine has an ECM to control major systems such as fu](/manual-img/42/57017/w960_57017-1905.png)
EC-666
< SERVICE INFORMATION >[VK45DE]
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
Trouble Diagnosis IntroductionINFOID:0000000001326523
INTRODUCTION
The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leaks, fouled spark plugs, or
other malfunctions with the engine.
It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the incidents. A road
test with CONSULT-III (or GST) or a circuit tester connected should
be performed. Follow the Work Flow on "Work Flow".
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a dr iveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Di agnostic Worksheet like the example
on "Worksheet Sample" should be used.
Start your diagnosis by looking fo r conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.
WORK FLOW
MEF036D
SEF233G
SEF234G
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
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TROUBLE DIAGNOSISEC-677
< SERVICE INFORMATION > [VK45DE]
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Engine Control Com
ponent Parts LocationINFOID:0000000001326527
1. IPDM E/R 2. ICC brake hold relay
(ICC model INFINITI FX35 2008 Service Manual
TROUBLE DIAGNOSISEC-677
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Engine Control Com
ponent Parts LocationINFOID:0000000001326527
1. IPDM E/R 2. ICC brake hold relay
(ICC model](/manual-img/42/57017/w960_57017-1916.png)
TROUBLE DIAGNOSISEC-677
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Engine Control Com
ponent Parts LocationINFOID:0000000001326527
1. IPDM E/R 2. ICC brake hold relay
(ICC models only)3. Refrigerant pressure sensor
4. Intake valve timing control position sensor (Bank 2) 5. Intake valve timing control solenoid
valve (Bank 2) 6. Electric throttle control actuator
7. Cooling fan motor 8. Intake valve timing control solenoid valve (Bank 1)9. Intake valve timing control position
sensor (Bank 1)
10. Camshaft position sensor (PHASE) 11. Mass air flow sensor
(with intake air temperature sensor) 12. Ignition coil (with power transistor)
and spark plug (Bank 1)
13. Vacuum tank 14. VIAS control solenoid valve 15. Engine coolant temperature sensor
16. Fuel injector (Bank 1) 17. Power valve actuator 18. Knock sensor (Bank 1)
19. Knock sensor (Bank 2) 20. Fuel injector (Bank 2) 21. EVAP canister purge volume control solenoid valve
22. EVAP service port 23. Ignition coil (with power transistor) and spark plug (Bank 2)
PBIB3224E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
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TROUBLE DIAGNOSISEC-703
< SERVICE INFORMATION > [VK45DE]
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*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.
DTC & SR INFINITI FX35 2008 Service Manual
TROUBLE DIAGNOSISEC-703
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*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.
DTC & SR](/manual-img/42/57017/w960_57017-1942.png)
TROUBLE DIAGNOSISEC-703
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*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
For details, refer to
EC-633, "Emission-related Diagnostic Information".
SRT WORK SUPPORT Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
DTC WORK SUPPORT Mode
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
FUEL INJEC-
TION Engine: Return to the original
trouble condition
Change the amount of fuel injec-
tion using CONSULT-III. If trouble symptom disappears, see
CHECK ITEM.
Harness and connectors
Fuel injector
A/F sensor 1
IGNITION TIM-
ING Engine: Return to the original
trouble condition
Timing light: Set
Retard the ignition timing using
CONSULT-III. If trouble symptom disappears, see
CHECK ITEM.
Perform Idle Air Volume Learning.
POWER BAL-
ANCE Engine: After warming up, idle the
engine.
A/C switch: OFF
Shift lever: N
Cut off each fuel injector signal one at a time using CONSULT-III. Engine runs rough or dies.
Harness and connectors
Compression
Fuel injector
Power transistor
Spark plug
Ignition coil
COOLING FAN* Ignition switch: ON
Turn the cooling fan “HI”, “MID”
and “OFF” using CONSULT-III. Cooling fan moves and stops. Harness and connectors
Cooling fan motor
IPDM E/R
ENG COOLANT
TEMP Engine: Return to the original
trouble condition
Change the engine coolant tem- perature using CONSULT-III. If trouble symptom disappears, see
CHECK ITEM. Harness and connectors
Engine coolant temperature sen-
sor
Fuel injector
FUEL PUMP RE-
LAY Ignition switch: ON (Engine
stopped)
Turn the fuel pump relay “ON” and “OFF” using CONSULT-III
and listen to operating sound. Fuel pump relay makes the operat-
ing sound.
Harness and connectors
Fuel pump relay
VIAS S/V-1 Ignition switch: ON
Turn solenoid valve “ON” and
“OFF” with CONSULT-III and lis-
ten to operating sound. Solenoid valve makes an operating
sound.
Harness and connectors
Solenoid valve
PURG VOL
CONT/V Engine: After warming up, run en-
gine at 1,500 rpm.
Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-III. Engine speed changes according to
the opening percent.
Harness and connectors
Solenoid valve
FUEL/T TEMP
SEN Change the fuel tank temperature using CONSULT-III.
VENT CON-
TROL/V Ignition switch: ON (Engine
stopped)
Turn solenoid valve “ON” and “OFF” with the CONSULT-III and
listen to operating sound. Solenoid valve makes an operating
sound.
Harness and connectors
Solenoid valve
V/T ASSIGN AN-
GLE
Engine: Return to the original trouble condition
Change intake valve timing using
CONSULT-III. If trouble symptom disappears, see
CHECK ITEM.
Harness and connectors
Intake valve timing control sole-
noid valve
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![INFINITI FX35 2008 Service Manual
DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS-
FIRE
EC-895
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DTC P0300 - P0308 MULTIPLE CYLINDER
MISFIRE, NO. 1 - INFINITI FX35 2008 Service Manual
DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS-
FIRE
EC-895
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DTC P0300 - P0308 MULTIPLE CYLINDER
MISFIRE, NO. 1 -](/manual-img/42/57017/w960_57017-2134.png)
DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS-
FIRE
EC-895
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DTC P0300 - P0308 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 8 CYLINDER
MISFIRE
On Board Diagnosis LogicINFOID:0000000001326728
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary , ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage) On the first trip that a misfire condition occurs t hat can damage the three way catalyst (TWC) due to over-
heating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions
for a change.
When the misfire condition decreases to a level t hat will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level t hat will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration) For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
light when the misfire is detected on a second trip. Du ring this condition, the ECM monitors the CKP sen-
sor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation ProcedureINFOID:0000000001326729
CAUTION:
Always drive vehicle in safe manner according to traf fic conditions and obey all traffic laws when driv-
ing.
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
Sensor Input Signal to ECM ECM function
Crankshaft position sensor (POS) Engine speed On board diagnosis of misfire
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0300
0300 Multiple cylinder misfire
detected
Multiple cylinder misfire.
Improper spark plug
Insufficient compression
Incorrect fuel pressure
The fuel injector circuit is open or shorted
Fuel injector
Intake air leak
The ignition signal circuit is open or short-ed
Lack of fuel
Drive plate
A/F sensor 1
Incorrect PCV hose connection
P0301
0301
No.1 cylinder misfire de-
tected
No. 1 cylinder misfires.
P0302
0302 No. 2 cylinder misfire
detected
No. 2 cylinder misfires.
P0303
0303 No. 3 cylinder misfire
detected
No. 3 cylinder misfires.
P0304
0304 No. 4 cylinder misfire
detected
No. 4 cylinder misfires.
P0305
0305 No. 5 cylinder misfire
detected
No. 5 cylinder misfires.
P0306
0306 No. 6 cylinder misfire
detected
No. 6 cylinder misfires.
P0307
0307 No. 7 cylinder misfire
detected
No. 7 cylinder misfires.
P0308
0308 No. 8 cylinder misfire
detected
No. 8 cylinder misfires.
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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EC-898
< SERVICE INFORMATION >[VK45DE]
DTC P0300 - P0308 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 8 CYLINDER MIS-
FIRE
Provide battery voltage between the following terminals, and then
interrupt it. Liste INFINITI FX35 2008 Service Manual
EC-898
< SERVICE INFORMATION >[VK45DE]
DTC P0300 - P0308 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 8 CYLINDER MIS-
FIRE
Provide battery voltage between the following terminals, and then
interrupt it. Liste](/manual-img/42/57017/w960_57017-2137.png)
EC-898
< SERVICE INFORMATION >[VK45DE]
DTC P0300 - P0308 MULTIPLE CYLINDER
MISFIRE, NO. 1 - 8 CYLINDER MIS-
FIRE
Provide battery voltage between the following terminals, and then
interrupt it. Listen to each fuel injector operating sound.
OK or NG
OK >> GO TO 6.
NG >> Perform trouble diagnosis for EC-1149
.
6.CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to releas e fuel pressure, or fuel pres-
sure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electri-
cal discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be checked.
8. Crank engine for five seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm between the edge of the spark plug and grounded metal portion
as shown in the figure.
11. Crank engine for about three seconds, and check whether spark
is generated between the spark plug and the grounded metal
portion.
CAUTION:
Do not approach to the spar k plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the el ectrical discharge voltage
becomes 20kV or more.
It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
OK or NG
OK >> GO TO 10.
Cylinder Harness connector terminal
(+) (–)
1
F201 5 3
32
51
76
2
F221 5 3
42
61
86
Operating sound should exist.
PBIB2449E
Spark should be generated.
PBIB1482E
PBIB2325E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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