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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 63 (ENGINE CONTROLS [SYSTEM & COMPONENT TESTING])VARIABLE VALVE TIMING SYSTEMOIL CONTROL VALVE - MAZDA6 & MIATA ONLYSPOOL VALVE OPERATION
1999 Mazda 626 ES, 2.5 D, Standard

Spool Valve Operation

1999 Mazda 626 ES, 2.5 D, StandardSECTION Spool Valve Operation
WARNING: This page is about a different car, the 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, 2003 Mazda MPV, and 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the Oil Control Valve (OCV). See OIL CONTROL VALVE under VARIABLE VALVE TIMING SYSTEM in REMOVAL, OVERHAUL & INSTALLATION article.
  2. Ensure spool valve (in OCV) is in maximum valve timing retard position. See Fig 1. If not as specified, replace OCV.
  3. Ensure battery is fully charged. Charge battery if necessary.
  4. Using fused jumper wires, apply battery voltage between OCV terminals and ensure spool valve moves to maximum valve timing advance position. If OCV operation is not as specified, replace OCV.
    NOTE: When applying battery voltage between OCV terminals, connection can be either of 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".
  5. Disconnect fused jumper wires and verify spool valve returns to maximum valve timing retard position. See Fig 1. If OCV does not operate as specified, replace OCV.
Fig 1: Inspecting Oil Control Valve Operation
G00143769Courtesy of MAZDA MOTORS CORP.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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