2008 INFINITI QX56 Factory Service Manual

Page 1497 of 4083

INFINITI QX56 2008  Factory Service Manual EC-198
< COMPONENT DIAGNOSIS >[VK56DE]
P0300, P0301, P0302, P
0303, P0304, P0305, P0306,  P0307, P0308 MISFIRE
P0300, P0301, P0302, P0303, P0304,  P0305, P0306, P0307, P0308 MIS-
FIRE
On Board Diagn o

Page 1498 of 4083

INFINITI QX56 2008  Factory Service Manual P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-199
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
1. Start engine and warm it up to normal operating tempera

Page 1499 of 4083

INFINITI QX56 2008  Factory Service Manual EC-200
< COMPONENT DIAGNOSIS >[VK56DE]
P0300, P0301, P0302, P
0303, P0304, P0305, P0306,  P0307, P0308 MISFIRE
When disconnecting each fuel injector harness connector one at a time, is there any cylin

Page 1500 of 4083

INFINITI QX56 2008  Factory Service Manual P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-201
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
• Do not approach to the spark pl
ug and the ignition co

Page 1501 of 4083

INFINITI QX56 2008  Factory Service Manual EC-202
< COMPONENT DIAGNOSIS >[VK56DE]
P0300, P0301, P0302, P
0303, P0304, P0305, P0306,  P0307, P0308 MISFIRE
OK or NG
OK >> GO TO 12.
NG >> GO TO 11.
11 .DETECT MALFUNCTIONING PART
Check the followi

Page 1502 of 4083

INFINITI QX56 2008  Factory Service Manual P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-203
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
6. Also check harness for short to power.
OK or NG
OK >> G

Page 1503 of 4083

INFINITI QX56 2008  Factory Service Manual EC-204
< COMPONENT DIAGNOSIS >[VK56DE]
P0327, P0328, 
P0332, P0333 KS
P0327, P0328, P0332, P0333 KS
Component DescriptionINFOID:0000000001351546
The knock sensor is attached to t he cylinder block. It

Page 1504 of 4083

INFINITI QX56 2008  Factory Service Manual P0327, P0328, P0332, P0333 KSEC-205
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2