2008 INFINITI QX56 Factory Service Manual

Page 1721 of 4083

INFINITI QX56 2008  Factory Service Manual EC-422
< COMPONENT DIAGNOSIS >[VK56DE]
POSITIVE CRANKCASE VENTILATION
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any hose
cannot be freed

Page 1722 of 4083

INFINITI QX56 2008  Factory Service Manual REFRIGERANT PRESSURE SENSOREC-423
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
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M A
EC
NP
O
REFRIGERANT PRESSURE SENSOR
Component DescriptionINFOID:0000000001365897
The refrigerant pressure sen

Page 1723 of 4083

INFINITI QX56 2008  Factory Service Manual EC-424
< COMPONENT DIAGNOSIS >[VK56DE]
REFRIGERANT PRESSURE SENSOR
Refer to EC-86, "Ground Inspection".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
3.CHECK REFRIGERANT PRESSURE

Page 1724 of 4083

INFINITI QX56 2008  Factory Service Manual REFRIGERANT PRESSURE SENSOREC-425
< COMPONENT DIAGNOSIS > [VK56DE]
C
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EC
NP
O
6.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E5, F14
• Harness for open

Page 1725 of 4083

INFINITI QX56 2008  Factory Service Manual EC-426
< ECU DIAGNOSIS >[VK56DE]
ECM
ECU DIAGNOSIS
ECM
CONSULT-lll Reference Valu
e in Data Monitor ModeINFOID:0000000001351350
Remarks:
�z Specification data are reference values.
�z  Specification d

Page 1726 of 4083

INFINITI QX56 2008  Factory Service Manual ECM
EC-427
< ECU DIAGNOSIS > [VK56DE]
C
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G H
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EC
NP
O
LOAD SIGNAL • Ignition switch: ON
Rear window defogger switch is ON 
and/or lighting switch is in 2nd.
ON
Rear window defogger s

Page 1727 of 4083

INFINITI QX56 2008  Factory Service Manual EC-428
< ECU DIAGNOSIS >[VK56DE]
ECM
*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, the
y differ
from ECM terminals voltage

Page 1728 of 4083

INFINITI QX56 2008  Factory Service Manual ECM
EC-429
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
ECM Harness Connector Terminal LayoutINFOID:0000000001351346
ECM Terminal and Reference ValueINFOID:0000000001351347
PREPARATION
E