Mazda CX-5 Service & Repair Manual: Oil Control Valve (OCV) [Skyactiv G 2.0]

Mazda CX-5 Service & Repair Manual / Steering / Linkage, Power / Oil Control Valve (OCV) [Skyactiv G 2.0]

Purpose, Function

The OCV switches the oil passage to the hydraulic variable valve timing actuator to control the opening/closing period of the exhaust valve.

Construction

The OCV is installed to the exhaust camshaft cap (No.1).

The OCV consists of a spool valve which switches the engine oil passage and a plunger, coil, and return spring which operate the spool valve.

Operation

At retard

The spool valve is moved to the retard side by the signal from the PCM and engine oil is lead to the retard oil passage of the exhaust camshaft.

At advance

The spool valve is moved to the advance side by the signal from the PCM and engine oil is lead to the advance oil passage of the exhaust camshaft.

Middle point maintenance

The spool valve is moved to the closed position of the oil passage to the exhaust camshaft by the signal from the PCM.
The construction is designed to supply a small amount of oil to the advance oil passage even while the middle point is maintained, improving holding stability while at low oil pressure.

Fail-safe


DTC	Fail-safe
P0014:00	Performs the exhaust variable valve timing control with a maximum cam retard request.
P0015:00	Performs the exhaust variable valve timing control with a maximum cam retard request.
P2090:00	Performs the exhaust variable valve timing control with a maximum cam retard request.
P2091:00	Performs the exhaust variable valve timing control with a maximum cam retard request.

Oil Control Valve (OCV) Removal/Installation [Skyactiv G 2.0]

WARNING: A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing. 1. Disconnect the negative battery cable.. 2. Remove the plug hole plat ...

Power Steering Malfunction Indicator Light

Purpose The power steering malfunction indicator light warns the driver that there is a malfunction with the electric power steering (EPS) system. Function If there is a malfunc ...

Other materials:

Intake Air System
Purpose, Outline A vacuum pump has been adopted which supplies stable vacuum to the power brake unit. Structural View System Diagram Vacuum Hose Routing Diagram Structure The intake air system consists of the following parts: Part na ...

Starter [Skyactiv G 2.0]
Purpose, Function The starter rotates the crankshaft via the ring gear and it serves as a trigger to start the engine. Construction The starter is installed to the rear part of the engine on the left side. The starter is a coaxial reduction type which can obt ...

Fuel Injector
Purpose, Function Promotes atomization of fuel by injecting it from the multiple holes. Injects fuel according to the control signal from the PCM. Construction The fuel injector is installed to the cylinder head. The fuel injector has multiple injection hole ...