CONSTRUCTION
The cam timing oil control valve assembly controls its spool valve using duty-cycle control from the ECM. This allows hydraulic pressure to be applied to the advanced or retarded side of the camshaft timing exhaust gear assembly. When the engine is stopped, the cam timing oil control valve assembly (intake) will move to the retard position, and the cam timing oil control valve assembly is in the most advance position.
| *1 | Sleeve | *2 | Spring |
| *3 | Spool Valve | - | - |
| *a | to Camshaft Timing Exhaust Gear Assembly (VVT-i Controller) (Advance Side) | *b | to Camshaft Timing Exhaust Gear Assembly (VVT-i Controller) (Retard Side) |
| *c | Drain | *d | Oil Pressure |