2005 Acura 1.7EL StandardFACTORY OEM SERVICE PROCEDURE

Fuel Fill Cap Check

  1. Check the fuel fill cap (the cap must say "if not tightened 3 clicks check engine light may come on").

    Is proper fuel fill cap installed and properly tightened? 

    1. YES  - Go to step 2.
    2. NO  - Replace or tighten the cap.
  2. Check the fuel fill cap seal.

    Is the fuel fill cap seal missing or damaged? 

    1. YES  - Replace the fuel fill cap (gray or black colored cap).
    2. NO  - Fuel fill cap is OK. Go to step 3.

    EVAP Canister Purge Valve Test 

  3. Disconnect the vacuum hose from the EVAP canister purge valve (A), and connect a vacuum pump to the hose.
    Fig 1: Disconnecting Vacuum Hose From EVAP Canister Purge Valve
    G01954944
  4. Turn the ignition switch ON (II).
  5. Apply vacuum to the hose.

    Does the valve hold vacuum? 

    1. YES  - EVAP canister purge valve is OK. Go to step  11.
    2. NO  - Go to step 6.
  6. Turn the ignition switch OFF.
  7. Disconnect the EVAP canister purge valve 2P connector.
  8. Check for continuity between the EVAP canister purge valve 2P connector terminal No. 2 and body ground.
    Fig 2: Checking Continuity Between EVAP Canister Purge Valve 2-Pin Connector Terminal No. 2 & Body Ground
    G01954945

    Is there continuity? 

    1. YES  - Go to step 9.
    2. NO  - Replace the EVAP canister purge valve.
  9. Disconnect ECM/PCM connector B (24P).
  10. Check for continuity between the EVAP canister purge valve 2P connector terminal No. 2 and body ground.
    Fig 3: Checking Continuity Between EVAP Canister Purge Valve 2-Pin Connector Terminal No. 2 & Body Ground
    G01954946

    Is there continuity? 

    1. YES  - Repair short in the wire between the EVAP canister purge valve and the ECM/PCM (B21).
    2. NO  - Reprogram the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck (see ECM/PCM REPROGRAMMING AND SUBSTITUTION FOR TESTING ). If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.

    EVAP Bypass Solenoid Valve Test 

  11. Disconnect both vacuum hoses from the EVAP two way valve (A), and connect a vacuum pump to the canister port on the EVAP two way valve.
    Fig 4: Disconnecting Both Vacuum Hoses From EVAP Two Way Valve
    G01954947
  12. Turn the EVAP bypass solenoid valve ON with the Honda PGM Tester, or connect ECM/PCM connector terminal E20 to body ground with a jumper wire.
    Fig 5: Connecting ECM/PCM Connector Terminal E20 To Body Ground
    G01954948
  13. Turn the ignition switch ON (II).
  14. Apply vacuum to the hose.

    Does the valve hold vacuum? 

    1. YES  - Go to step 15.
    2. NO  - Go to step  20.
  15. Turn the ignition switch OFF.
  16. Disconnect the EVAP bypass solenoid valve 2P connector.
  17. Check for continuity between the EVAP bypass solenoid valve 2P connector terminal No. 2 and body ground.
    Fig 6: Checking Continuity Between EVAP Bypass Solenoid Valve 2-Pin Connector Terminal No. 2 & Body Ground
    G01954949

    Is there continuity? 

    1. YES  - Go to step 18.
    2. NO  - Repair open in the wire between the EVAP bypass solenoid valve and the ECM/PCM (E20).
  18. Turn the ignition switch ON (II).
  19. Measure voltage between the EVAP bypass solenoid valve 2P connector terminal No. 1 and body ground.
    Fig 7: Measuring Voltage Between EVAP Bypass Solenoid Valve 2-Pin Connector Terminal No. 1 & Body Ground
    G01954950
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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