Mazda MX-3 silhouetteMX-3

VARIABLE RESONANCE INDUCTION SYSTEM (VRIS)

F2-101prose procedure

VRIS applies to the K8-ZE V6 engine.

Continued from F2-100

System Operation

  1. 1
    Start the engine and run it at idle.
  2. 2
    Connect a tachometer to the data link connector IG- terminal as shown.
    Engine bay setup with a timing light and tachometer connected; inset shows the data link connector and the IG- terminal where the tachometer is connected.
  3. 3
    Open the throttle valve.
    Hand opening the throttle valve at the throttle linkage, with an arrow indicating the direction of motion.
  4. 4
    Verify that the rod is pulled into the shutter valve actuator 1 and 2 when the engine speed is as shown.
    The operation of the shutter valve actuator cannot be checked unless load condition while the engine speed is within 1,900-2,600 rpm as shown in the figure.
    Chart of VRIS shutter valve actuator state (OPEN/CLOSE) versus engine speed. Row for actuator 1: CLOSE, OPEN (around 1900-2600), CLOSE, OPEN (around 3900-6300), CLOSE. Row for actuator 2: CLOSE, OPEN, CLOSE, OPEN, CLOSE. X-axis gridlines at 1900 / 2600 / 3900 / 4700 / 6300 rpm. Bottom annotation OPEN/CLOSE; axis labeled ENGINE SPEED (rpm).
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