2008 INFINITI QX56 Factory Service Manual

Page 1393 of 4083

INFINITI QX56 2008  Factory Service Manual EC-94
< COMPONENT DIAGNOSIS >[VK56DE]
P0011, P0021 IVT CONTROL
4. Check voltage between intake valve timing control solenoid
valve terminal 2 and ground with CONSULT-III or tester.
OK or NG
OK >> GO T

Page 1394 of 4083

INFINITI QX56 2008  Factory Service Manual P0011, P0021 IVT CONTROLEC-95
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
NG >> Remove debris and clean the signal pick-up cutout of camshaft sprocket.
16.CHECK TIMING CHAIN INSTA

Page 1395 of 4083

INFINITI QX56 2008  Factory Service Manual EC-96
< COMPONENT DIAGNOSIS >[VK56DE]
P0011, P0021 IVT CONTROL
2. Check resistance between intake valve timing control solenoid
valve terminals as follows.
If NG, replace intake valve timing control s

Page 1396 of 4083

INFINITI QX56 2008  Factory Service Manual P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
EC-97
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0031, P0032, P0051, P0052 
A/F SENSOR 1 HEATER
DescriptionINFOID:0000000001351384

Page 1397 of 4083

INFINITI QX56 2008  Factory Service Manual EC-98
< COMPONENT DIAGNOSIS >[VK56DE]
P0031, P0032, P0051, P00
52 A/F SENSOR 1 HEATER
Refer to EC-86, "Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK A

Page 1398 of 4083

INFINITI QX56 2008  Factory Service Manual P0031, P0032, P0051, P0052 A/F SENSOR 1 HEATER
EC-99
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to p

Page 1399 of 4083

INFINITI QX56 2008  Factory Service Manual EC-100
< COMPONENT DIAGNOSIS >[VK56DE]
P0037, P0038, P0057, 
P0058 HO2S2 HEATER
P0037, P0038, P0057, P0058 HO2S2 HEATER
DescriptionINFOID:0000000001351385
SYSTEM DESCRIPTION
The ECM performs ON/OFF co

Page 1400 of 4083

INFINITI QX56 2008  Factory Service Manual P0037, P0038, P0057, P0058 HO2S2 HEATER
EC-101
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
7. If 1st trip DTC is detected, go to 
EC-101, "Diagnosis Procedure".
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Follow t