P1663

CIRCUIT DESCRIPTION
The VVT system controls the intake valve timing to proper timing in response to driving condition. The ECM controls the Oil Control Valve (OCV) to make the intake valve timing properly, and oil pressure controlled with OCV is supplied to the VVT controller, and then VVT controller changes relative position between the camshaft and the crankshaft.




DETECTING CONDITIONS




WIRING DIAGRAM

INSPECTION PROCEDURE

HINT: Read freeze frame data using LEXUS hand-held tester or OBD II scan tool. Because freeze frame records the engine conditions when the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.

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LEXUS hand-held tester:

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OBD II scan tool (excluding LEXUS hand-held tester):