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2006 Nissan Frontier 4.0L Eng SE
1Search™
P0011
Precautions For Supplemental Restraint System (SRS) "AIR BAG" And "SEAT BELT
PRE­TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE­TENSIONER", used
along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front
passenger for certain types of collision. This system includes seat belt switch inputs and dual stage
front air bag modules. The SRS system uses the seat belt switches to determine the front air bag
deployment, and may only deploy one front air bag, depending on the severity of a collision and
whether the front occupants are belted or unbelted. Information necessary to service the system
safely is included in the SUPPLEMENTAL RESTRAINT SYSTEM and SEAT BELTS .
WARNING:
To avoid rendering the SRS inoperative, which could increase the risk of personal
injury or death in the event of a collision which would result in air bag inflation, all
maintenance must be performed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can
lead to personal injury caused by unintentional activation of the system. For removal
of Spiral Cable and Air Bag Module, see the SUPPLEMENTAL RESTRAINT SYSTEM
section.
Do not use electrical test equipment on any circuit related to the SRS unless instructed
to in this article. SRS wiring harnesses can be identified by yellow and/or orange
harnesses or harness connectors.
DTC P0011, P0021 IVT CONTROL
Description
SYSTEM DESCRIPTION
INPUT SIGNAL TO ECM REFERENCE
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position
sensor (POS)
Engine speed and
Camshaft position sensor piston position
(PHASE)
Engine coolant
temperature sensor
Engine coolant
temperature
Wheel sensor
Vehicle speed(1)
Intake valve timing Intake valve timing control
control
solenoid valve
(1)
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(1)
This signal is sent to the ECM through CAN communication line
Fig 1: IVT Control System Flow Diagram
Courtesy of NISSAN MOTOR CO., U.S.A.
This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the
intake valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine
coolant temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing
control solenoid valve depending on driving status. This makes it possible to control the shut/open
timing of the intake valve to increase engine torque in low/mid speed range and output in high­speed
range.
CONSULT­II Reference Value In Data Monitor Mode
Specification data are reference values.
MONITOR ITEM
MONITOR ITEM
CONDITION
Engine: After warming up
INT/V TIM (B1)
INT/V TIM (B2)
SPECIFICATION
Idle
­5° ­ 5°CA
Shift lever: P or N (A/T), Neutral (M/T)
Air conditioner switch: OFF
No load
2,000 RPM Approx. 0° ­ 30°CA
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Engine: After warming up
INT/V SOL (B1)
INT/V SOL (B2)
Idle
0% ­ 2%
Shift lever: P or N (A/T), Neutral (M/T)
Air conditioner switch: OFF
2,000 RPM Approx. 0% ­ 50%
No load
On Board Diagnosis Logic
DTC DETECTING CONDITION AND POSSIBLE CAUSE
DTC
No.
Trouble diagnosis
name
Detecting condition
Possible cause
Crankshaft position sensor
(POS)
P0011
0011
(Bank
1)
Camshaft position sensor
(PHASE)
Intake valve timing There is a gap between angle of
control
target and phase­control angle
performance
degree.
P0021
0021
(Bank
2)
Intake valve timing control
solenoid valve
Accumulation of debris to the
signal pick­up portion of the
camshaft
Timing chain installation
Foreign matter caught in the oil
groove for intake valve timing
control
FAIL­SAFE MODE
When the malfunction is detected, the ECM enters fail­safe mode.
ENGINE OPERATING CONDITION IN FAIL­SAFE MODE CHART
Detected items
Intake valve timing
control
Engine operating condition in fail­safe mode
The signal is not energized to the solenoid valve and the valve control does
not function.
DTC Confirmation Procedure
CAUTION: Always drive at a safe speed.
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NOTE:
If DTC P0011 or P0021 is displayed with DTC P0075 or P0081, first perform trouble
diagnosis for DTC P0075 or P0081. Refer to "DTC P0075, P0081 IVT CONTROL
SOLENOID VALVE ".
If DTC Confirmation Procedure has been previously conducted, always turn ignition
switch OFF and wait at least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10V and
16V at idle. WITH CONSULT­II
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT­II.
2. Start engine and warm it up to the normal operating temperature.
3. Maintain the following conditions for at least 6 consecutive seconds. Hold the accelerator
pedal as steady as possible.
ENG SPEED REFERENCE
ENG SPEED
1,200 ­ 2,000 RPM
COOLAN TEMP/S
More than 60°C (140°F)
B/FUEL SCHDL
More than 3.5 msec
Selector lever
P or N position (A/T)
Neutral position (M/T)
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Fig 2: CONSULT­II Screen Display ­ Data Monitor
Courtesy of NISSAN MOTOR CO., U.S.A.
4. Stop vehicle with engine running and let engine idle for 10 seconds.
5. If the 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE ".
If the 1st trip DTC is not detected, go to next step.
6. Maintain the following conditions for at least 20 consecutive seconds.
ENG SPEED REFERENCE
ENG SPEED
1,700 ­ 3,175 RPM (A constant rotation is maintained.)
COOLAN
TEMP/S
70 ­ 105°C (158 ­ 221°F)
Selector lever 1st or 2nd position
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Driving
Driving vehicle uphill (Increased engine load will help maintain the driving
location uphill conditions required for this test.)
7. If the 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE ".
WITH GST
Follow the procedure "WITH CONSULT­II" above.
Diagnostic Procedure
1. CHECK OIL PRESSURE WARNING LAMP 1. Start engine.
2. Check oil pressure warning lamp and confirm it is not illuminated.
OK or NG OK: GO TO 2.
NG: Go to "OIL PRESSURE CHECK ".
Fig 3: Identifying Oil Pressure Warning Lamp
Courtesy of NISSAN MOTOR CO., U.S.A.
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2. CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE Refer to "COMPONENT INSPECTION ".
OK or NG OK: GO TO 3.
NG: Replace intake valve timing control solenoid valve.
3. CHECK CRANKSHAFT POSITION SENSOR (POS) Refer to "COMPONENT INSPECTION ".
OK or NG OK: GO TO 4.
NG: Replace crankshaft position sensor (POS).
4. CHECK CAMSHAFT POSITION SENSOR (PHASE) Refer to "COMPONENT INSPECTION ".
OK or NG OK: GO TO 5.
NG: Replace camshaft position sensor (PHASE).
5. CHECK CAMSHAFT (INTAKE) Check the following.
1. Accumulation of debris to the signal plate of camshaft rear end
2. Chipping signal plate of camshaft rear end
OK or NG OK: GO TO 6.
NG: Remove debris and clean the signal plate of camshaft rear end or replace camshaft.
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Fig 4: View Of Intake Camshaft
Courtesy of NISSAN MOTOR CO., U.S.A.
6. CHECK TIMING CHAIN INSTALLATION Check service records for any recent repairs that may cause timing chain misaligned.
Are there any service records that may cause timing chain misaligned? Yes or No Yes: Check timing chain installation. Refer to "TIMING CHAIN ".
No: GO TO 7.
7. CHECK LUBRICATION CIRCUIT Refer to "INSPECTION OF CAMSHAFT SPROCKET (INT) OIL GROOVE ".
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OK or NG OK: GO TO 8.
NG: Clean lubrication line.
8. CHECK INTERMITTENT INCIDENT Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
For Wiring Diagram, refer to WIRING DIAGRAM for CKP sensor (POS) and WIRING
DIAGRAM for CMP sensor (PHASE).
: INSPECTION END Component Inspection
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
1. Disconnect intake valve timing control solenoid valve harness connector.
2. Check resistance between intake valve timing control solenoid valve as follows.
TERMINAL AND RESISTANCE DESCRIPTION
Terminal
Resistance
1 and 2
7.0 ­ 7.7ohm at 20°C (68°F)
1 or 2 and ground
[infinity] ohm (Continuity should not exist.)
If NG, replace intake valve timing control solenoid valve.
If OK, go to next step.
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Fig 5: Checking Sensor Internal Resistance And Resistance To Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
3. Remove intake valve timing control solenoid valve.
4. Provide 12V DC between intake valve timing control solenoid valve terminals and then
interrupt it. Make sure that the plunger moves as shown in the figure.
CAUTION: Do not apply 12V DC continuously for 5 seconds or more. Doing so
may result in damage to the coil in intake valve timing control solenoid valve.
If NG, replace intake valve timing control solenoid valve.
NOTE: Always replace O­ring when intake valve timing control solenoid valve is
removed.
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Fig 6: Energizing Intake Valve Control Solenoid
Courtesy of NISSAN MOTOR CO., U.S.A.
Removal And Installation
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to "TIMING CHAIN ".
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