Toyota Tundra. Manual — part 1511
pressure through the OCV. As a result, the relative positions of the camshaft and crankshaft are optimized, the
engine torque and fuel economy improve, and the exhaust emissions decrease under overall driving conditions.
The ECM detects the actual intake valve timing using signals from the camshaft and crankshaft position
sensors, and performs feedback control. This is how the target intake valve timing is verified by the ECM.
Fig. 40: Camshaft Position System Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART
MONITOR DESCRIPTION
The ECM optimizes the intake valve timing using the VVT (Variable Valve Timing) system to control the
intake camshaft. The VVT system includes the ECM, Oil Control Valve (OCV) and VVT controller. The ECM
sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the
VVT controller. The VVT controller can advance or retard the intake camshaft.
If the difference between the target and actual intake valve timings is large, and changes in the actual intake
valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and sets a DTC.
Example:
A DTC is stored when the following conditions 1 and 2 are met for 10 seconds or more:
DTC
DTC Detection Condition
Trouble Area
P0011
P0021
Intake valve timing is not adjusted
in valve timing advance range (1
trip detection logic)
Valve timing
OCV for intake camshaft
OCV filter
Intake camshaft timing gear
ECM
P0012
P0022
Intake valve timing is not adjusted
in valve timing retard range (2 trip
detection logic)
Valve timing
OCV for intake camshaft
OCV filter
Intake camshaft timing gear
ECM
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
1. The difference between the target and actual intake valve timing is more than 5°CA (Crankshaft Angle)
and the condition continues for more than 5 seconds.
2. It takes 5 seconds or more to change the valve timing by 5°CA.
DTC P0011 and P0021 (Advanced Cam Timing) are subject to 1 trip detection logic.
DTC P0012 and P0022 (Retarded Cam Timing) are subject to 2 trip detection logic.
These DTCs indicate that the VVT controller cannot operate properly due to OCV malfunctions or the presence
of foreign objects in the OCV.
The monitor will run if all of the following conditions are met:
The engine is warm (the engine coolant temperature is 75°C [167°F] or more).
The vehicle has been driven at more than 64 km/h (40 mph) for 3 minutes.
The engine has idled for 3 minutes.
MONITOR STRATEGY
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL ENABLING CONDITIONS
Related DTCs
P0011: Advanced camshaft timing (for Bank 1)
P0012: Retarded camshaft timing (for Bank 1)
P0021: Advanced camshaft timing (for Bank 2)
P0022: Retarded camshaft timing (for Bank 2)
Required Sensors/Components
(Main)
VVT OCV and VVT Actuator
Required Sensors/Components
(Related)
Crankshaft position sensor, Camshaft position sensor and Engine
coolant temperature sensor
Frequency of Operation
Once per driving cycle
Duration
Within 10 seconds
MIL Operation
Advanced camshaft timing: Immediate
Retarded camshaft timing: 2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs
not present
P0010, P0020 (VVT Oil Control Valve)
P0016, P0018 (VVT System - Misalignment)
P0102, P0103 (Mass Air Flow Sensor)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop
Fuel Control)
P0335 (Crankshaft Position Sensor) P1340 (Camshaft
Position Sensor)
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
TYPICAL MALFUNCTION THRESHOLDS
Advanced Camshaft Timing
TYPICAL MALFUNCTION THRESHOLDS - ADVANCED CAMSHAFT TIMING
Retarded Camshaft Timing
CAMSHAFT TIMING SPECIFICATION
If the difference between the target and actual camshaft timings is more than the specified value, the ECM
operates the VVT actuator.
Then, the ECM monitors the camshaft timing change for 10 seconds.
WIRING DIAGRAM
Refer to DTC P0010 .
INSPECTION PROCEDURE
HINT:
DTC P0011, P0012, P0021 or P0022 may be set when foreign objects in the engine oil are caught in some parts
of the system. The DTC will remain set even if the system returns to normal after a short time. Foreign objects
are filtered out by the oil filter.
HINT:
ADVANCED TIMING OVER REFERENCE
If DTC P0011 or P0012 is displayed, check the left bank VVT system for intake camshaft circuit (for
Bank 1).
Battery voltage
11 V or more
Engine speed
500 to 4000 RPM
ECT
75 to 100°C (167 to 212°F)
Deviation of actual valve timing and target valve timing
More than 5°CA
Valve timing
No change at advanced valve timing
Deviation of actual valve timing and target valve timing
More than 5°CA
Valve timing
No change at retarded valve timing
Abnormal
bank
Advanced timing over (Valve timing is out
of specified range)
Retarded timing over (Valve timing is out
of specified range)
Bank 1
P0011
P0012
Bank 2
P0021
P0022
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
Bank 1 refers to the bank that includes No. 1 cylinder.
If DTC P0021 or P0022 is displayed, check the right bank VVT system for intake camshaft circuit (for
Bank 2).
Bank 2 refers to the bank that does not include No. 1 cylinder.
Read freeze frame data using the Techstream. Freeze frame data records the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was
moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other
data from the time the malfunction occurred.
1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022)
a. Connect the Techstream to the DLC3.
b. Turn the ignition switch to ON and turn the Techstream ON.
c. Enter the following menus: Powertrain/Engine and ECT/Trouble Codes.
d. Read DTCs.
Result
RESULT REFERENCE
HINT:
If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first.
B: GO TO DTC CHART
A: Go to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV)
a. Connect the Techstream to the DLC3.
b. Start the engine and turn the Techstream ON.
c. Warm up the engine.
d. Enter the following menus: Powertrain/Engine and ECT/Active Test/Control the VVT System
(Bank 1) or Control the VVT System (Bank 2).
e. Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream.
OK
ACTIVE TEST REFERENCE
Result
Proceed to
P0011, P0012, P0021 or P0022 is output
A
P0011, P0012, P0021 or P0022 and other DTCs are output
B
Operation
Specified Condition
OCV OFF Normal engine speed
2009 Toyota Tundra
2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
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