Vacuum Signal (SOHC)

Disconnect vacuum hose from shutter valve actuator. See Fig 2 . Place a finger over hose and ensure vacuum is felt between 3700 RPM and 5750 RPM. Reconnect vacuum hose to actuator.

Fig 1: Testing Shutter Valve Actuator (DOHC)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Locating Shutter Valve Actuator & Rod (SOHC)

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Fig 3: Testing Solenoid Valve Voltage (SOHC)

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Fig 4: Locating Shutter Valve Actuator Rod (DOHC)

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Fig 5: Locating Shutter Valve Control Arm (SOHC)

Courtesy of MAZDA MOTORS CORP.