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Home >> Mazda >> 1989 >> B2600i Base >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests - 4-CYL >> Fuel System >> By-Pass Air Control (BAC) System (323) >> BAC Valve

BAC Valve

  1. Remove BAC valve hose from throttle body. See Fig 1 . Blow air through port "A". Ensure air flows when valve is cold. If not, replace BAC valve.
  2. Measure resistance of Idle Speed Control (ISC) Valve at 2 wire connector of BAC valve. Resistance should be between 5-20 ohms, at normal operating temperature. If not, replace BAC valve.
Fig 1: BAC Valve Identification (323)
G117785Courtesy of MAZDA MOTORS CORP.
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