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Home >> Honda >> 2003 >> Pilot EX >> Repair and Diagnosis >> Engine Performance >> System >> EVAP System >> EVAP Two Way Valve Test >> Special Tools Required
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Special Tools Required

  1. Remove the fuel fill cap.
  2. Remove the EVAP canister cover (see step 1 on EVAP Canister Replacement  ).
  3. Disconnect the vapor line from the EVAP two way valve (A). Connect it to a T-fitting (B) from the vacuum gauge and the vacuum pump as shown.
    Fig 1: Disconnecting The Vapor Line From The EVAP Two Way Valve
    G01464275Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Apply vacuum slowly and continuously while watching the gauge. The vacuum should stabilize momentarily at 0.8-2.1 kPa (6-16 mmHg, 0.2-0.6 in.Hg). If the vacuum stabilizes (valve opens) below 0.8 kPa (6 mmHg, 0.2 in.Hg) or above 2.1 kPa (16 mmHg, 0.6 in.Hg). install a new valve and retest.
  5. Move the vacuum pump hose from the vacuum fitting to the pressure fitting, and move the vacuum gauge hose from the vacuum side to the pressure side (A) as shown.
    Fig 2: Moving The Vacuum Gauge Hose From The Vacuum Side To The Pressure Side
    G01464276Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Slowly pressurize the vapor line while watching the gauge. The pressure should stabilize momentarily above 1.0 kPa (8 mmHg. 0.3 in.Hg).
    • If the pressure momentarily stabilizes (valve opens) above 1.0 kPa (8 mmHg. 0.3 in.Hg), the valve is OK.
    • If the pressure stabilize below 1.0 kPa (8 mmHg. 0.3 in.Hg), install a new valve and retest.
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