Toyota Tundra. Manual — part 1332
In the VVT (Variable Valve Timing) system, the appropriate intake valve open and close timing is controlled by
the ECM. The ECM performs intake valve control by performing the following: 1) controlling the camshaft and
camshaft timing oil control valve, and operating the camshaft timing gear; and 2) changing the relative positions
of the gaps between the camshaft and crankshaft.
DTC DETECTION CONDITION AND TROUBLE AREA
MONITOR DESCRIPTION
To monitor the correlation of the intake camshaft position and crankshaft position, the ECM checks the VVT
learning value while the engine is idling. The VVT learning value is calibrated based on the camshaft position
and crankshaft position. The intake valve timing is set to the most retarded angle while the engine is idling. If
the VVT learning value is out of the specified range in consecutive driving cycles, the ECM illuminates the
MIL and sets the DTC P0016 (for bank 1) or P0018 (for bank 2).
MONITOR STRATEGY
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL ENABLING CONDITIONS
DTC
Code
DTC Detection Condition
Trouble Area
P0016
Deviation in crankshaft position sensor signal and VVT
sensor 1 (intake camshaft for bank 1) signal (2 trip
detection logic)
Mechanical system (Timing belt
has jumped tooth or belt
stretched)
ECM
P0018
Deviation in crankshaft position sensor signal and VVT
sensor 2 (intake camshaft for bank 2) signal (2 trip
detection logic)
Mechanical system (Timing belt
has jumped tooth or belt
stretched)
ECM
Related DTCs
P0016: Camshaft timing misalignment at idling (bank 1 intake side)
P0018: Camshaft timing misalignment at idling (bank 2 intake side)
Required Sensors/Components
VVT actuator
Required Sensors/Components
Camshaft position sensor, Crankshaft position sensor
Frequency of Operation
Once per driving cycle
Duration
Within 1 minute
MIL Operation
2 driving cycles
Sequence of Operation
None
Monitor runs whenever following DTCs not present
P0011 (VVT System 1 - Advance)
P0012 (VVT System 1 - Retard)
P0021 (VVT System 2 - Advance)
P0022 (VVT System 2 - Retard)
P0115 - P0118 (ECT sensor)
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
TYPICAL MALFUNCTION THRESHOLDS
TYPICAL MALFUNCTION THRESHOLDS
WIRING DIAGRAM
Refer to DTC P0335 .
INSPECTION PROCEDURE
HINT:
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 P0016 OR P0018)
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
B : GO TO DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART )
A : Go To Next Step
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV)
HINT:
If the VVT system can be operated through the Active Test, it can be assumed that the VVT system is
operating normally.
Engine RPM
400 to 1000 RPM
One of following conditions met
-
VVT learning value when camshaft maximum retarded
Less than 22.5°CA
VVT learning value when camshaft maximum retarded
More than 47°CA
Result
Proceed To
P0016 or P0018 is output
A
P0016 or P0018 and other DTCs are output
B
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
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)/All Data/VVT Change Angle (Bank 1) or VVT
Change Angle (Bank 2).
e. Perform the Active Test. Check that the displacement angle varies.
OK: Varies
NG : Go to step 4
OK : Go To Next Step
3. ADJUST VALVE TIMING (See DTC P0016 CRANKSHAFT POSITION - CAMSHAFT
POSITION CORRELATION (BANK 1 SENSOR A); DTC P0018 CRANKSHAFT POSITION -
CAMSHAFT POSITION CORRELATION (BANK 2 SENSOR A) )
NEXT : Go to step 6
4. INSPECT CAMSHAFT OIL CONTROL VALVE (See DTC P0016 CRANKSHAFT POSITION -
CAMSHAFT POSITION CORRELATION (BANK 1 SENSOR A); DTC P0018 CRANKSHAFT
POSITION - CAMSHAFT POSITION CORRELATION (BANK 2 SENSOR A) )
NG : REPLACE CAMSHAFT OIL CONTROL VALVE (See REMOVAL )
OK : Go To Next Step
5. REPLACE CAMSHAFT TIMING TUBE ASSEMBLY
a. Replace the camshaft timing tube assembly. (See DISASSEMBLY ).
6. CONFIRM WHETHER DTC OUTPUT RECURS
a. Connect the Techstream to the DLC3.
b. Turn the ignition switch to ON and turn the Techstream ON.
c. Clear the DTC. (See DTC CHECK/CLEAR ).
d. Start the engine and warm it up.
e. Switch the ECM from normal mode to check mode using the Techstream. (See CHECK MODE
PROCEDURE ).
f. Drive the vehicle in an urban area for approximately 10 minutes.
g. Read DTCs using the Techstream.
OK: No DTC is output.
NG : GO TO DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART )
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
OK : END
DTC P0031 OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 1);
DTC P0032 OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1);
DTC P0051 OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT LOW (BANK 2 SENSOR 1);
DTC P0052 OXYGEN (A/F) SENSOR HEATER CONTROL CIRCUIT HIGH (BANK 2 SENSOR 1)
DESCRIPTION
Refer to DTC P2195 .
HINT:
Although the DTC titles say oxygen sensor, these DTCs relate to the Air-Fuel Ratio (A/F) sensor.
Sensor 1 refers to the sensor mounted in front of the Three-Way Catalytic Converter (TWC) and located
near the engine assembly.
When one of these DTCs is set, the ECM enters fail-safe mode. The ECM turns off the A/F sensor heater
in fail-safe mode. Fail-safe mode continues until the ignition switch is turned off.
The ECM provides a pulse width modulated control circuit to adjust the current through the heater. The
A/F sensor heater circuit uses a relay on the +B side of the circuit.
Fig. 43: DTC P0031 Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) - System
Diagram
DTC DETECTION CONDITION AND TROUBLE AREA
DTC
Code
DTC Detection Condition
Trouble Area
Open in A/F sensor heater
circuit
2008 Toyota Tundra
2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
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