2007 INFINITI QX56 Factory Service Manual

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Page 1233 of 3061

INFINITI QX56 2007 Factory Service Manual EC-150
< SERVICE INFORMATION >
DTC P0011, P0021 IVT CONTROL
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 I

EC-150
< SERVICE INFORMATION >
DTC P0011, P0021 IVT CONTROL
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 three places). The ECM provides feedback to the intake
valve timing control for appropriate target valve open-close timing
according to drive conditions based on detected cam position.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003531649
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000003531650
FA I L - S A F E M O D E
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation ProcedureINFOID:0000000003531651
CAUTION:
Always drive at a safe speed.
NOTE:
•If DTC P0011 or P0021 is displayed with DTC P0075, P0081, P1140 or P1145, first perform the trouble
diagnosis for EC-178
or EC-457.
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
INT/V SOL (B1)
INT/V SOL (B2)• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No loadIdle 0% - 2%
2,000 rpm Approx. 25% - 50%
DTC No. Trouble diagnosis name Detecting condition Possible cause
P0011
0011
(Bank 1)
Intake valve timing control
performanceAThe alignment of the intake valve timing
control has been misresistered.• Harness or connectors
(Intake valve timing control solenoid
valve circuit is open or shorted.)
• Harness or connectors
(Intake valve timing control position
sensor circuit is open or shorted.)
• Intake valve timing control solenoid
valve
• 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
sprocket
• Timing chain installation
• Foreign matter caught in the oil
groove for intake valve timing control P0021
0021
(Bank 2)BThere is a gap between angle of target and
phase-control angle degree.
Detected items Engine operating condition in fail-safe mode
Intake valve timing control The signal is not energized to the solenoid valve and the valve control does not function

Page 1234 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0011, P0021 IVT CONTROL
EC-151
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
• If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at

Page 1235 of 3061

INFINITI QX56 2007 Factory Service Manual EC-152
< SERVICE INFORMATION >
DTC P0011, P0021 IVT CONTROL
Wiring Diagram
INFOID:0000000003531652
BANK 1
Specification data are reference values and are measured between each terminal and ground.
Pul

Page 1236 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0011, P0021 IVT CONTROL
EC-153
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the

Page 1237 of 3061

INFINITI QX56 2007 Factory Service Manual EC-154
< SERVICE INFORMATION >
DTC P0011, P0021 IVT CONTROL
BANK 2
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CA

Page 1238 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0011, P0021 IVT CONTROL
EC-155
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis Procedu

Page 1239 of 3061

INFINITI QX56 2007 Factory Service Manual EC-156
< SERVICE INFORMATION >
DTC P0011, P0021 IVT CONTROL
Refer to EC-143, "Ground Inspection".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
3.CHECK INTAKE VALVE TIMING CONTRO

Page 1240 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0011, P0021 IVT CONTROL
EC-157
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
5.CHECK INTAKE VALVE TIMING CONTROL POSITION SENSOR GROUND CIRCUIT FOR OPEN AND
SHORT
1. Turn ignition switc

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