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Spool Valve Operation Inspection

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cable.
  2. Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
  3. Disconnect the oil control valve connector.
  4. Remove the oil control valve.
  5. Verify that the spool valve in the oil control valve is in the maximum valve timing retard position as indicated in the figure.
    • If not as specified, replace the oil control valve.
    Fig 1: Inspecting Spool Valve Position In Oil Control Valve
    G00973798Courtesy of MAZDA MOTORS CORP.
  6. Verify that the battery is fully charged.
    • If not as specified, recharge the battery.
  7. Apply battery positive voltage between the oil control valve terminals and verify that the spool valve operates and moves to the maximum valve timing advance position.
    • If not as specified, replace the oil control valve.
    NOTE:
    • When applying battery positive voltage between the oil control valve 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.
    Fig 2: Identifying Oil Control Valve Connector Terminals
    G00973799Courtesy of MAZDA MOTORS CORP.
  8. 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 oil control valve.
  9. Connect the oil control valve connector.
  10. Install the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
  11. Disconnect the negative battery cable.
    Fig 3: Inspecting Spool Valve
    G00973800Courtesy of MAZDA MOTORS CORP.
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