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Home >> Mazda >> 1991 >> 929 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Variable Resonance Induction System (VRIS) >> Electrical Signal (SOHC)

Electrical Signal (SOHC)

Connect voltmeter to Violet terminal of solenoid valve. See Figure . Ensure voltmeter reading is within specifications throughout RPM range. Replace solenoid valve if not within specifications. See VRIS RPM VOLTAGE SPECIFICATIONS (SOHC)  table.

VRIS RPM VOLTAGE SPECIFICATIONS (SOHC)

Engine Speed Voltmeter
Less Than 3700 RPM Approx. 12V
3700-5750 RPM Less Than 2.0V
Greater Than 5750 RPM Approx. 12V