2011 INFINITI QX56 Coil

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Page 2334 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-310
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0420, P0430 THREE 
WAY CATALYST FUNCTION
6. Remove all ignition coil harness connectors to avoi d the electrical discharge from the ignition coils.
7. Remove

Page 2335 of 5598

INFINITI QX56 2011  Factory Service Manual 
P0420, P0430 THREE WAY CATALYST FUNCTIONEC-311
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
NO >> Replace spark plug(s) with standard type one(s). For spark plug type, refer to

Page 2530 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-506
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
IGNITION SIGNAL
IGNITION SIGNAL
Component Function CheckINFOID:0000000006218011
1.INSPECTION START
Turn ignition switch OFF, and restart engine.
Does the engi

Page 2531 of 5598

INFINITI QX56 2011  Factory Service Manual 
IGNITION SIGNALEC-507
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
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K L
M A
EC
NP
O
Is the inspection result normal?
YES >> GO TO 2.
NO >> Go to 
EC-168, "
Diagnosis Procedure".
2.CHECK IGNITION

Page 2532 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-508
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
IGNITION SIGNAL
YES >> GO TO 6.
NO >> Repair open circuit or short to power in harness or connectors.
6.CHECK CONDENSER
Refer to  EC-510, "
Component Inspecti

Page 2533 of 5598

INFINITI QX56 2011  Factory Service Manual 
IGNITION SIGNALEC-509
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
YES >> GO TO 10.
NO >> Repair open circuit or short to power in harness or connectors.
10.CHECK IGNITION COIL

Page 2534 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-510
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
IGNITION SIGNAL
3. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
 For the fuse number, refer to  EC-114, "
Wiring Diagram".
 For the fus

Page 2563 of 5598

INFINITI QX56 2011  Factory Service Manual 
EM-1
ENGINE
C
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F
G H
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K L
M
SECTION EM
A
EM
N
O P
CONTENTS
ENGINE MECHANICAL
PRECAUTION ................ ...............................3
PRECAUTIONS ............................................
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