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Home >> Honda >> 2000 >> Odyssey EX >> Repair and Diagnosis >> Engine Performance >> System >> EVAP System >> DTC Troubleshooting >> DTC P1457 -'99-00 Models: EVAP Control System Leakage (EVAP canister system) >> Canister System Leak Test

Canister System Leak Test

  1. Turn the ignition switch OFF.
  2. Connect 2 three-way T-fittings (A) into the hose from the EVAP canister to the EVAP two way valve. Connect the FTP sensor to one of the T-fittings and the vacuum pump to the other.
    Fig 1: Connecting 2 three-way T-fittings (A) Into The Hose From The EVAP Canister To The EVAP Two Way Valve
    G01511903Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Remove the vent hose from the EVAP canister vent shut valve (A) and cap the port (B) to seal the fresh air vent of the EVAP canister.
    Fig 2: Removing The Vent Hose From The EVAP Canister Vent Shut Valve
    G01511904Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Turn the ignition switch ON (II).
  5. While monitoring FTP sensor voltage with the HDS, or while measuring voltage between PCM connector terminals A29 and C18, slowly pump the vacuum pump every 1 -2 seconds.
  6. Continue to pump vacuum until the voltage drops to about 1.5 V. Make sure that the engine coolant temperature is still above 95°F (35°C) and your vacuum pump does not have a leak.
  7. Check the voltage for 20 seconds.

    Does the voltage drop to 1.5 V and hold for at least 20 seconds? 

    1. YES:  Inspect the EVAP canister vent shut valve line and connections.
    2. NO:  Go to step 8.
  8. Turn the ignition switch OFF.
  9. Disconnect the purge line, hose (A) from the canister at the metal line, and plug the hose (B).
    Fig 3: Disconnect The Purge Line, Hose From The Canister At The Metal Line, & Plug The Hose
    G01511905Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Turn the ignition switch ON (II).
  11. While monitoring FTP sensor voltage with the HDS, or while measuring voltage between PCM connector terminals A29 and C18, slowly pump the vacuum pump.
  12. Continue to pump vacuum until the voltage drops to about 1.5 V. Make sure that the engine coolant temperature is still above 95°F (35°C) and your vacuum pump does not have a leak.
  13. Monitor the voltage for 20 seconds.

    Does the voltage drop to 1.5 V and hold for at least 20 seconds? 

    1. YES:  Inspect the EVAP purge control solenoid valve line and connections. If they are OK, do the EVAP two way valve test (see EVAP Two Way Valve Test  ).
    2. NO:  Replace the EVAP canister.
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