AISIN University: Oil Control Valve Solenoid Diagnostic

How does an engine control camshaft timing? It’s not electric or vacuum-powered—it’s managed through the oil pump, camshaft actuators, and the oil control valve solenoid (OCV). In this video, AISIN’s experts break down how these systems work together to precisely advance or retard camshaft timing for optimal performance.

You’ll learn:

• How oil pressure controls camshaft position through the actuator
• How to back-probe and test the OCV with a meter, scan tool, or oscilloscope
• What a proper voltage waveform looks like (zero to 12 volts with clean edges) • Common issues caused by dirty or incorrect oil viscosity
• How to inspect and diagnose oil control solenoid and timing chain issues

Whether you’re chasing a rough idle, sluggish acceleration, or startup noise, understanding how to diagnose the oil control valve solenoid can save time and prevent costly misdiagnoses.