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Home >> Honda >> 2003 >> CR-V EX, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> EVAP System >> Fuel Tank Vapor Control Valve Test >> Valve Test
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Valve Test

  1. Make sure the fuel tank is less than half full.
  2. Remove the fuel fill cap.
  3. Disconnect the fuel tank vapor signal tube (A).
    Fig 1: Disconnecting Fuel Tank Vapor Signal Tube
    G01475782Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Disconnect the vacuum hoses (A) from the EVAP canister (B), then plug the ports with plugs (C).
    Fig 2: Disconnecting Vacuum Hoses From EVAP Canister
    G01475783Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Disconnect the vacuum hose (D) from the EVAP canister vent shut valve (E), and connect a vacuum pump to the vacuum hose.
  6. Pump the vacuum pump 80 times.
    • If the vacuum holds, go to step 7.
    • If the vacuum does not hold, go to step  10.
  7. Connect a second vacuum pump to the fuel tank vapor signal tube (A).
    Fig 3: Connecting Second Vacuum Pump To Fuel Tank Vapor Signal Tube
    G01475784Courtesy of AMERICAN HONDA MOTOR CO., INC.
  8. Apply vacuum (1 pump) to the fuel tank vapor signal tube, then check the vacuum on the pump in step 6.
    • If the vacuum holds, replace the fuel tank vapor control valve (see EVAP Canister Replacement  ).
    • If the vacuum is released, go to step 9.
  9. Fill the fuel tank with fuel, then check for fuel in the EVAP two way valve (A), and fuel tank vapor recirculation hose (B).
    NOTE: At either location, tiny droplets of fuel are normal.
    • If the fuel runs out of the hoses at either location, replace the fuel tank vapor control valve.
    • If the fuel does not run out of the hoses, the fuel tank vapor system is OK.
      Fig 4: Checking Fuel In EVAP Two Way Valve & Fuel Tank Vapor Recirculation Hose
      G01475785Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Disconnect the fuel tank vapor vent tube from the EVAP canister, then plug the port on the canister. Reapply vacuum (80 pumps).
    • If the vacuum holds, replace the fuel tank control valve (see EVAP Canister Replacement  ).
    • If the vacuum does not hold, inspect the EVAP canister vent shut valve O-ring. If the O-ring is OK, replace the EVAP canister and repeat step  4.
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