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Home >> Mazda >> 1993 >> MPV LX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - EFI >> Miscellaneous Controls >> Exhaust Control >> Variable Exhaust System (929)
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Variable Exhaust System (929)

  1. With engine idling, ensure exhaust gas comes out of one exhaust pipe. Raise engine speed to 3500 RPM. Exhaust gas should come out of both exhaust pipes.
  2. To test control motor, remove inside-rear trunk panel. Disconnect control motor connector. Apply 12 volts to Yellow/Black wire and ground to Blue wire. Control motor should rotate clockwise. Reverse leads and control motor should rotate counterclockwise. If system does not function as specified, check wiring between computer and control motor. See PIN VOLTAGE CHART S article.
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