toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Diagnostic Trouble Code Tests and Associated Procedures|Page 3605 > < Diagnostic Trouble Code Tests and Associated Procedures|Page 3603
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Step 7

OBD II Scantool (excluding TOYOTA hand tester) 

DTC P1656 OCV Circuit Malfunction

DTC P1656 OCV Circuit Malfunction 

CIRCUIT DESCRIPTION 

VVT system controls the intake valve timing to proper timing in response to driving condition. ECM controls OCV (Oil Control Valve) 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 

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