2006 INFINITI FX35 Service Manual

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Page 2401 of 4462

INFINITI FX35 2006 Service Manual DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
EC-1017
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Revision: 2006 December 2006 FX35/FX45
Diagnostic ProcedureNBS0046Z
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INFINITI FX35 2006 Service Manual EC-1018
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2006 December 2006 FX35/FX45
4. CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-II
1. Turn i

Page 2403 of 4462

INFINITI FX35 2006 Service Manual DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
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5. CHECK FUNCTION OF FUEL INJE

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INFINITI FX35 2006 Service Manual EC-1020
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2006 December 2006 FX35/FX45
6. CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following proce

EC-1020
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2006 December 2006 FX35/FX45
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-II to release 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 spark plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the electrical 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.
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 three seconds, and recheck whether 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-1328
.
Spark should be generated.
PBIB1482E
PBIB2325E
Spark should be generated.

Page 2405 of 4462

INFINITI FX35 2006 Service Manual DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
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8. CHECK SPARK PLUG
Check the

Page 2406 of 4462

INFINITI FX35 2006 Service Manual EC-1022
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2006 December 2006 FX35/FX45
13. CHECK IGNITION TIMING
Check the following items. Refer to EC-73

Page 2407 of 4462

INFINITI FX35 2006 Service Manual DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
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14. CHECK AIR FUEL RATIO (A/F)

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INFINITI FX35 2006 Service Manual EC-1024
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2006 December 2006 FX35/FX45
15. CHECK A/F SENSOR 1 HEATER
Refer to EC-842, "
Component Inspecti

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