Toyota Tundra 2005 Service - Repair - Maintenance page 771

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CIRCUIT DESCRIPTION

Refer to DTCs P0010 on page DI−492.

Advanced cam timing:

After engine is warmed up and engine speed is at 400 to

4,000 rpm, condition (a) continues. (1 trip detection logic)

(a) Valve timing does not change from current valve timing

Retarded cam timing:

After engine is warmed up and engine speed is at 400 to

4,000 rpm, condition (a) continues. (2 trip detection logic)

(a) Valve timing does not change from current valve timing

MONITOR DESCRIPTION

The ECM optimizes the valve timing using the VVT (Variable Valve Timing) system to control the intake valve

camshaft. The VVT system includes the ECM, the OCV (Oil Control Valve) and the VVT controller. The ECM

sends a target "duty−cycle" control signal to the OCV. This control signal, applied to the OCV, regulates the

oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake valve cam-

A DTC will set if: 1) the difference between the target and actual valve timing is more than 5 degrees of the

crankshaft angle (CA) and the condition continues for more than 4.5 sec.; or 2) the OCV is forcibly activated

63 times or more.

Advanced cam DTCs are subject to "1 trip" detection logic.

Retarded cam DTCs are subject to "2 trip" detection logic.

Camshaft Position "A" −Timing Over−

Actuator or System Performance (Bank 1

Camshaft Position "A" −Timing Over−

Retarded (Bank 1)

Camshaft Position "A" −Timing Over−

Actuator or System Performance (Bank 2)

Camshaft Position "A" −Timing Over−

Retarded (Bank 2)

DTC Detecting Condition

ENGINE (2UZ−FE)

S Valve timing

S VVT controller assembly

Trouble Area