2007 INFINITI QX56 Factory Service Manual

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Page 1537 of 3061

INFINITI QX56 2007 Factory Service Manual EC-454
< SERVICE INFORMATION >
DTC P0850 PNP SWITCH
Wiring Diagram
INFOID:0000000003531970
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not us

Page 1538 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0850 PNP SWITCH
EC-455
< SERVICE INFORMATION >
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Diagnosis ProcedureINFOID:0000000003531971
1.CHECK DTC WITH TCM
Refer to AT-39, "
OBD-II Diagnostic Trouble Code (DT

Page 1539 of 3061

INFINITI QX56 2007 Factory Service Manual EC-456
< SERVICE INFORMATION >
DTC P0850 PNP SWITCH
6.DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors M31, E152
• Harness for open or short between ECM and combination meter
>

Page 1540 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1140, P1145 IVT CONTROL POSITION SENSOR
EC-457
< SERVICE INFORMATION >
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DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Component DescriptionINFOID:0000000003531972
In

DTC P1140, P1145 IVT CONTROL POSITION SENSOR
EC-457
< SERVICE INFORMATION >
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DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Component DescriptionINFOID:0000000003531972
Intake valve timing control position sensors are located in the front of
cylinder heads in both bank 1 and bank 2.
This sensor uses a Hall IC.
The cam position is determined by the intake camshaft sprocket con-
cave (in four places). The ECM provides feedback to the intake valve
timing control for appropriate target valve open-close timing accord-
ing to drive conditions based on detected cam position.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003531973
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000003531974
DTC Confirmation ProcedureINFOID:0000000003531975
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Maintain the following conditions for at least 10 seconds.
4. If 1st trip DTC is detected, go to EC-461, "
Diagnosis Procedure".
SEF359Z
MONITOR ITEM CONDITION SPECIFICATION
INT/V TIM (B1)
INT/V TIM (B2)• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No loadIdle−5° - 5°CA
2,000 rpm Approx. 0° - 20°CA
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1140
11 4 0
(Bank 1)
Intake valve timing control
position sensor circuitAn excessively high or low voltage from the
sensor is sent to ECM.• Harness or connectors
(Intake valve timing control position
sensor circuit is open or shorted)
• Intake valve timing control position
sensor
• Crankshaft position sensor (POS)
• Camshaft position sensor (PHASE)
• Accumulation of debris to the signal
pick-up portion of the camshaft sprock-
et P1145
11 4 5
(Bank 2)
ENG SPEED More than idle speed
Selector lever P or N position
SEF058Y

Page 1541 of 3061

INFINITI QX56 2007 Factory Service Manual EC-458
< SERVICE INFORMATION >
DTC P1140, P1145 IVT CONTROL POSITION SENSOR
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Wiring DiagramINFOID:0000000003531976
BANK 1
Specification data

Page 1542 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1140, P1145 IVT CONTROL POSITION SENSOR
EC-459
< SERVICE INFORMATION >
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CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may r

Page 1543 of 3061

INFINITI QX56 2007 Factory Service Manual EC-460
< SERVICE INFORMATION >
DTC P1140, P1145 IVT CONTROL POSITION SENSOR
BANK 2
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured b

Page 1544 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P1140, P1145 IVT CONTROL POSITION SENSOR
EC-461
< SERVICE INFORMATION >
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: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
D

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