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Home >> Honda >> 1985 >> Civic DX, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System >> Component Testing >> Vacuum Switch C >> 1500 Except HF

1500 Except HF

  1. Disconnect vacuum hose No. 15 to vacuum switch C and connect a hand vacuum pump to the hose. Apply vacuum to switch. Check for voltage at Black/Red wire of vacuum switch C.
  2. Voltage should be available when a vacuum less than 6 in. Hg (all except California with manual transmission) and 3 in. Hg (California with manual transmission) is applied. If there is no voltage, replace the vacuum switch C and retest.