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Home >> Mazda >> 2006 >> 6 s, 4D Wagon, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Mechanical [Service Information L3 With TC)) >> Oil Control Valve (OCV) Inspection >> Able to Keep Idling >> When using the SST (WDS or equivalent).

When using the SST (WDS or equivalent).

WARNING: This page is about a different variant/trim than selected.
  1. Connect the SST  (WDS or equivalent).
  2. Warm up the engine.
  3. Using the VT DUTY1 simulation function, set the duty value of the OCV to 100% and verify that the engine idles roughly or stalls.
    • If it idles roughly or stalls, verify the timing chain assembly (valve timing).
    • If it does not idle roughly or stall, perform the following inspection.
    1. Remove the OCV and connect the OCV connector.
    2. Turn the ignition switch to the ON position.
    3. Using the VT DUTY1 simulation function, change the duty value for the OCV from 0%  to 100%  , and then verify that the spool valve inside the OCV operates and moves to the maximum valve timing advance position.
      • If it does not operate, inspect OCV operation and the wiring harnesses and connectors between the OCV and PCM for a short circuit or disconnection.
    4. Inspect the hydraulic passage for leakage.
      Fig 1: Identifying Spool Valve - Maximum Valve Timing Advance Position
      G04324483Courtesy of MAZDA MOTORS CORP.

      Hydraulic passage 

      Between the oil pressure switch and the OCV 

      Between the OCV and the camshaft Oil passage inside the camshaft 

    5. If the inspected parts are normal, replace the variable valve timing actuator.
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