Operation CHARM: Car repair manuals for everyone.
Home >> Mazda >> 2002 >> MX-5 Miata LS L4-1.8L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Variable Valve Timing Actuator >> Testing and Inspection >> Variable Valve Timing Control System Operation Inspection
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Variable Valve Timing Control System Operation Inspection

Variable Valve Timing System Operation Inspection

When idling cannot be continued

1. Remove the OCV (oil control valve) and verify that the spool valve is at maximum retard position.
- If the spool valve is stuck in advance direction, replace the OCV (oil control valve).

2. Connect the OCV (oil control valve) connector.
3. Turn the ignition switch on.
4. Verify that the spool valve is at maximum retard position.
- If the spool valve is stuck in advance direction, inspect for the following.
- Short circuit in harnesses or connectors between the OCV (oil control valve) and the PCM.

5. Inspect the VVT (variable valve timing) actuator.
pro multis · About Operation CHARM