2008 INFINITI QX56 Factory Service Manual

Page 1433 of 4083

INFINITI QX56 2008  Factory Service Manual EC-134
< COMPONENT DIAGNOSIS >[VK56DE]
P0125 ECT SENSOR
1. Check resistance between engine coolant temperature sensor
terminals 1 and 2 as shown in the figure.
<Reference data>
2. If NG, replace engin

Page 1434 of 4083

INFINITI QX56 2008  Factory Service Manual P0127 IAT SENSOREC-135
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0127 IAT SENSOR
Component DescriptionINFOID:0000000001351446
The intake air temperature sensor is
 built into m

Page 1435 of 4083

INFINITI QX56 2008  Factory Service Manual EC-136
< COMPONENT DIAGNOSIS >[VK56DE]
P0127 IAT SENSOR
3. Select “DATA MONITOR” mode with CONSULT-III.
4. Start engine.
5. Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive sec

Page 1436 of 4083

INFINITI QX56 2008  Factory Service Manual P0127 IAT SENSOREC-137
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
SEF012P
Revision: March 2010
2008 QX56

Page 1437 of 4083

INFINITI QX56 2008  Factory Service Manual EC-138
< COMPONENT DIAGNOSIS >[VK56DE]
P0128 THERMOSTAT FUNCTION
P0128 THERMOSTAT FUNCTION
On Board Diagn
osis LogicINFOID:0000000001449652
NOTE:
If DTC P0128 is displayed with DTC P0300, P0301, P0302

Page 1438 of 4083

INFINITI QX56 2008  Factory Service Manual P0128 THERMOSTAT FUNCTIONEC-139
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
If “COOLAN TEMP/S” increases to more than 71°
C (160°F) within 30 minutes, turn ignition switch
O

Page 1439 of 4083

INFINITI QX56 2008  Factory Service Manual EC-140
< COMPONENT DIAGNOSIS >[VK56DE]
P0128 THERMOSTAT FUNCTION
 With GST
Follow the procedure “With CONSULT-III” above.
Diagnosis ProcedureINFOID:0000000001449654
1.CHECK ENGINE COOLANT TEMPERAT

Page 1440 of 4083

INFINITI QX56 2008  Factory Service Manual P0130, P0150 A/F SENSOR 1EC-141
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0130, P0150 A/F SENSOR 1
Component DescriptionINFOID:0000000001351457
The air fuel ratio (A/F) sensor