Infiniti FX35, FX50 (S51). Manual - part 680
P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
EC-261
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
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2.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-III.
3.
Check that each circuit produces a momentary engine speed drop.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 4.
4.
CHECK FUNCTION OF FUEL INJECTOR
1.
Start engine and let it idle.
2.
Listen to each fuel injector operation.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Perform trouble diagnosis for FUEL INJECTOR, refer to
.
5.
CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Perform the following procedure in a place with no combustible objects and good ventilation.
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-III to release fuel pressure, or fuel pres-
sure applies again during the following procedure.
3.
Start engine.
4.
After engine stalls, crank it 2 or 3 times to release all fuel pres-
sure.
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 (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
11. Crank engine for approximately 3 seconds, and check whether
spark is generated between the spark plug and the grounded
metal portion.
CAUTION:
• Never place to the spark plug and the ignition coil within
50 cm (19.7 in). Be careful not to get an electrical shock
while checking, because the electrical discharge voltage
becomes 20 kV or more.
• It might damage the ignition coil if the gap of more than 17 mm (0.66 in) is made.
NOTE:
When the gap is less than 13 mm (0.52 in), a spark might be generated even if the coil is malfunc-
tioning.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 6.
Clicking sound should be heard.
PBIB3332E
Spark should be generated.
JMBIA1506ZZ
JMBIA0066GB