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HOMESERVICE MANUALSHONDA2001ODYSSEY LXREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMEVAP SYSTEMFUEL TANK VAPOR CONTROL VALVE TEST'01-04 MODELSVALVE TEST
2001 Honda Odyssey LX

Valve Test

2001 Honda Odyssey LXSECTION Valve Test
  1. Make sure the fuel tank is less than half full.
  2. Remove the fuel fill cap.
  3. Remove the bolts and fuel tank vapor control valve cover (A).
    Fig 1: Removing The Bolts & Fuel Tank Vapor Control Valve Cover
    G01511945Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Remove the bolts (A).
    Fig 2: Removing The Bolts
    G01511946Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Disconnect the fuel tank vapor signal tube (A).
    Fig 3: Disconnecting The Fuel Tank Vapor Signal Tube
    G01511947Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Disconnect the vacuum hose (A) from the EVAP canister (B), and then plug the ports (C).
    Fig 4: Disconnecting The Vacuum Hose
    G01511948Courtesy of AMERICAN HONDA MOTOR CO., INC.
  7. Disconnect the vacuum hose (D) from the EVAP canister vent shut valve (E), and connect a vacuum pump to the vacuum hose.
  8. Pump the vacuum pump 80 times.
    • If the vacuum holds, go to step 9.
    • If the vacuum does not hold, go to step  11.
  9. Connect a second vacuum pump to the fuel tank vapor signal tube (A).
    Fig 5: Connecting A Second Vacuum Pump To The Fuel Tank Vapor Signal Tube
    G01511949Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Apply vacuum (1 pump) to the fuel tank vapor signal tube (A), then check the vacuum on the pump in step 8.
  11. 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 fuel runs out of the hoses at either location, replace the fuel tank vapor control valve.
    • If fuel does not run out of the hoses at the fuel tank vapor control system is normal.
    Fig 6: Checking For Fuel In The EVAP Two Way Valve
    G01511950Courtesy of AMERICAN HONDA MOTOR CO., INC.
  12. Disconnect the fuel tank vapor control quick disconnect from the EVAP canister, then plug the port on the canister. Reapply vacuum (80 pumps).
    • If the vacuum holds, replace the fuel tank vapor control valve (see Fuel Tank Vapor Control Valve 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 the valve test.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.