2005 INFINITI FX35 Service Manual

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Page 2417 of 4731

INFINITI FX35 2005 Service Manual EC-1024
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2005 July 2005 FX
Diagnostic ProcedureABS00E5A
1. CHECK FOR INTAKE AIR LEAK
1. Start engine and r

Page 2418 of 4731

INFINITI FX35 2005 Service Manual DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
EC-1025
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Revision: 2005 July 2005 FX
4. CHECK FUNCTION OF INJECTOR-I
With

Page 2419 of 4731

INFINITI FX35 2005 Service Manual EC-1026
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2005 July 2005 FX
5. CHECK FUNCTION OF INJECTOR-II
Provide battery voltage between the following

Page 2420 of 4731

INFINITI FX35 2005 Service Manual DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
EC-1027
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Revision: 2005 July 2005 FX
6. CHECK FUNCTION OF IGNITION COIL-I
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
EC-1027
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Revision: 2005 July 2005 FX
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 17 mm or more is taken.
NOTE:
When the gap is 13 mm or less, 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-1339
.
Spark should be generated.
PBIB1482E
PBIB2325E
Spark should be generated.

Page 2421 of 4731

INFINITI FX35 2005 Service Manual EC-1028
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2005 July 2005 FX
8. CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK

Page 2422 of 4731

INFINITI FX35 2005 Service Manual DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
EC-1029
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Revision: 2005 July 2005 FX
12. DETECT MALFUNCTIONING PART
Check th

Page 2423 of 4731

INFINITI FX35 2005 Service Manual EC-1030
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DTC P0300 - P0308 MULTIPLE CYLINDER MISFIRE, NO. 1 - 8 CYLINDER MIS- FIRE
Revision: 2005 July 2005 FX
17. ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Eras

Page 2424 of 4731

INFINITI FX35 2005 Service Manual DTC P0327, P0328, P0332, P0333 KS EC-1031
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Revision: 2005 July 2005 FX
DTC P0327, P0328, P0332, P0333 KSPFP:22060
Component DescriptionABS007YK
The knoc

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