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Home >> Acura >> 2004 >> 1.7EL Standard >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc & Drum >> Brake Booster Test >> Booster Check Valve Test

Booster Check Valve Test

  1. Disconnect the brake booster vacuum hose (check valve built-in) (A) at the booster (B) side.
    Fig 1: Disconnecting Brake Booster Vacuum Hose At Booster Side
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  2. Start the engine, and let it idle. There should be vacuum available. If no vacuum is available, the check valve is not working properly. Replace the brake booster vacuum hose and check valve, and retest.
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