2008 INFINITI QX56 Factory Service Manual

Page 1401 of 4083

INFINITI QX56 2008  Factory Service Manual EC-102
< COMPONENT DIAGNOSIS >[VK56DE]
P0037, P0038, P0057, 
P0058 HO2S2 HEATER
4.CHECK HO2S2 HEATER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness con

Page 1402 of 4083

INFINITI QX56 2008  Factory Service Manual P0075, P0081 IVT CONTROL SOLENOID VALVEEC-103
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0075, P0081 IVT CONTROL SOLENOID VALVE
Component DescriptionINFOID:0000000001351393
Inta

Page 1403 of 4083

INFINITI QX56 2008  Factory Service Manual EC-104
< COMPONENT DIAGNOSIS >[VK56DE]
P0075, P0081 IVT CONTROL SOLENOID VALVE
3. Turn ignition switch ON.
4. Check voltage between intake valve timing control solenoid
valve terminal 2 and ground wit

Page 1404 of 4083

INFINITI QX56 2008  Factory Service Manual P0075, P0081 IVT CONTROL SOLENOID VALVEEC-105
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
2. Check resistance between intake valve timing control solenoid
valve terminals as follo

Page 1405 of 4083

INFINITI QX56 2008  Factory Service Manual EC-106
< COMPONENT DIAGNOSIS >[VK56DE]
P0101 MAF SENSOR
P0101 MAF SENSOR
Component DescriptionINFOID:0000000001351401
The mass air flow sensor is placed in the stream of intake air. It mea-
sures the

Page 1406 of 4083

INFINITI QX56 2008  Factory Service Manual P0101 MAF SENSOREC-107
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Procedure for Malfunction B-a
 WITH CONSULT-III 
1. Start engine and warm it up to normal operating temperature.

Page 1407 of 4083

INFINITI QX56 2008  Factory Service Manual EC-108
< COMPONENT DIAGNOSIS >[VK56DE]
P0101 MAF SENSOR
If engine cannot be started, go to 
EC-109, "Diagnosis Procedure".
2. Select “DATA MONITOR” mode with CONSULT-III.
3. Check the voltage of

Page 1408 of 4083

INFINITI QX56 2008  Factory Service Manual P0101 MAF SENSOREC-109
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Diagnosis ProcedureINFOID:0000000001351407
1.INSPECTION START
Which malfunction (A or B) is duplicated?
A or B
A