Spool Valve Operation

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

Remove the OCV. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [BP] .)
Verify that the spool valve in the OCV is the maximum valve timing retard position.
- If not as specified, replace the OCV.
Verify that the battery is fully charged.

Fig 1: Verifying Spool Valve In OCV Is Maximum Valve Timing Retard Position
Courtesy of MAZDA MOTORS CORP.
Apply battery positive voltage between the OCV terminals and verify that the spool valve operates and moves to the maximum valve timing advance position.

Fig 2: Verifying Spool Valve Operates
Courtesy of MAZDA MOTORS CORP.
- If not as specified, replace the OCV.
NOTE:
- When applying battery positive voltage between the OCV terminals, the connection can be either of the following:
  - Positive battery cable to terminal A, negative battery cable to terminal B.
  - Positive battery cable to terminal B, negative battery cable to terminal A.
Stop applying battery positive voltage and verify that the spool valve returns to the maximum valve timing retard position.
- If not as specified, replace the OCV.