2007 INFINITI M35 Factory Service Manual

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Page 1881 of 4647

INFINITI M35 2007 Factory Service Manual EC-352
[VQ35DE]
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
Revision: 2007 April2007 M35/M45
4. CHECK FUNCTION OF FUEL INJECTOR-I
Without CONSULT-II
1. Turn ignition swi

Page 1882 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
EC-353
[VQ35DE]
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Revision: 2007 April2007 M35/M45
5. CHECK FUNCTION OF FUEL INJECTOR-II
Provide batte

Page 1883 of 4647

INFINITI M35 2007 Factory Service Manual EC-354
[VQ35DE]
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
Revision: 2007 April2007 M35/M45
6. CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in t

EC-354
[VQ35DE]
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
Revision: 2007 April2007 M35/M45
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 (1) in IPDM E/R (2) to release fuel pres-
sure.
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 5 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 3 seconds, and check whether spark is
generated between the spark plug and the grounded metal por-
tion.
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 3 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-691, "
IGNITION SIGNAL" . Spark should be generated.
PBIB2697E
PBIB2325E
Spark should be generated.

Page 1884 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
EC-355
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Revision: 2007 April2007 M35/M45
8. CHECK SPARK PLUG
Check the initial spark plug fo

Page 1885 of 4647

INFINITI M35 2007 Factory Service Manual EC-356
[VQ35DE]
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
Revision: 2007 April2007 M35/M45
13. CHECK IGNITION TIMING
Check the following items. Refer to EC-78, "
Basic

Page 1886 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
EC-357
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Revision: 2007 April2007 M35/M45
14. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1. Turn

Page 1887 of 4647

INFINITI M35 2007 Factory Service Manual EC-358
[VQ35DE]
DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
Revision: 2007 April2007 M35/M45
16. REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace malfunctioning air fuel rat

Page 1888 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0327, P0328 KS
EC-359
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Revision: 2007 April2007 M35/M45
DTC P0327, P0328 KSPFP:22060
Component DescriptionNBS004YP
The knock sensor is attached to the cylinder b

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