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Home >> Mazda >> 2001 >> MX-5 Miata Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Air Induction Systems >> Variable Tumble Control System (VTCS) - Protege 1.6L & 626 2.0L >> Shutter Valve Actuator Check

Shutter Valve Actuator Check

Disconnect vacuum hose from actuator. Connect a vacuum pump to actuator. Watch actuator rod and apply vacuum to actuator. See SHUTTER VALVE ACTUATOR CHECK  table. If actuator does not operate as specified, replace actuator. If system is not working properly but actuator is okay, check vacuum lines.

SHUTTER VALVE ACTUATOR CHECK

Application/Vacuum - in. Hg (kPa) Actuator Rod Position
Protege 1.6L
Less Than -0.35 (-1.2) Extended
-1.1 To -8.2 (-3.6 To -28) Moving
More Than -8.2 (-28) Retracted
Protege 2.0L
Less Than -.80 (-2.7) Extended
-2.4 To -10.4 (-8.0 To -35) Moving
More Than -10.4 (-35) Retracted
626 2.0L
Less Than -0.39 (-1.3) Extended
-0.40 to -1.2 (-1.3 to -4) Moving
More Than -7.5 (-25.3) Retracted
NOTE: Perform VTCS solenoid check only when directed by SELF-DIAGNOSTICS testing.