2003 Honda Pilot EXFACTORY OEM SERVICE PROCEDURE

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 The Fuel Tank Vapor Signal Tube
    G01464278Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Remove the EVAP canister cover (see step 1 on EVAP Canister Replacement  ).
  5. Disconnect the vacuum hoses (A) from the EVAP canister (B), then plug the ports with plugs (C).
    Fig 2: Disconnecting The Vacuum Hoses From The EVAP Canister
    G01464279Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Disconnect the vacuum hose (D) from the EVAP canister vent shut valve (E), and connect a vacuum pump to the vacuum hose.
  7. Pump the vacuum pump 80 times.
    • If the vacuum holds, go to step 8.
    • If the vacuum does not hold, go to step 11.
  8. Connect a second vacuum pump to the fuel tank vapor signal tube (A).
    Fig 3: Connecting A Second Vacuum Pump To The Fuel Tank Vapor Signal Tube
    G01464280Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Apply vacuum (1 pump) to the fuel tank vapor signal tube (A), then check the vacuum on the pump in step 7.
    • If the vacuum holds, replace the fuel tank vapor control valve (see EVAP Canister Replacement  ).
    • If the vacuum is released, the EVAP canister vent shut valve is OK. Go to step 10.
    10. NOTE: At either location, tiny droplets of fuel are normal.
Factory Service Tools

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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.

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