DTC Troubleshooting: P04F1(2.0L Engine): Inspection

EVAP Canister Purge Line Visual Inspection 

Test Procedure 

• Procedure
• • Check for a poor connection, a blockage, or damage at the EVAP canister purge line between the intake manifold and the EVAP canister.

• Normal Conditions
• • Connecting conditions are OK, and there is no blockages or damages.

Results 

• If it is abnormal, there is a problem with the parts on the EVAP canister purge line between the intake manifold and the EVAP canister.

EVAP Canister Purge Line Inspection 

Test Procedure 

• Preparation
• • EVAP canister purge valve: removed with its connector and vacuum hose connected
• Procedure
• • Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge valve (B).
  • Disconnect the EVAP canister purge line (C) from the EVAP canister (D). Connect the T-fitting (E), the vacuum/pressure gauge, 0-4 inHg (F), and the vacuum pump/gauge, 0-30 inHg (G), to the EVAP canister purge line as shown.
  • Slowly apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.

Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC. Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.

• Normal Conditions
• • EVAP canister purge line does not hold vacuum.

Results 

• If it is abnormal, there is a problem with the parts on the EVAP canister purge line.

Purge Tube A Inspection 

Test Procedure 

• Procedure
• • Disconnect purge tube A from the EVAP canister purge valve (B), and connect the vacuum pump/gauge, 0-30 inHg (C), to the tube as shown.
  • Start the engine and let it idle.

Courtesy of HONDA, U.S.A., INC.

• Normal Conditions
• • Vacuum is indicated.

Results 

• If it is abnormal, there is a problem with purge tube A between the intake manifold and the EVAP canister purge valve.

FTP Sensor Functional Inspection 

Test Procedure 

• Preparation
• • Canister maintenance lid (with AWD): removed
  • FTP sensor: removed with its connector connected
• Procedure
• • Connect the T-fitting (A) to the vacuum pump/gauge, 0-30 inHg (B), and the vacuum/pressure gauge, 0-4 inHg (C) to the FTP sensor (D) as shown.
  • Turn the vehicle to the ON mode.
  • Confirm the HDS [FTP Sensor].
  • Slowly apply about 1.3 kPa (0.4 inHg, 10 mmHg) of vacuum to the hose.
    NOTE: Be careful not to exceed the vacuum. If you do, the FTP sensor can be damaged.
  • Confirm the [FTP Sensor].

Courtesy of HONDA, U.S.A., INC.

• Normal Conditions
• • Current value and recorded value of the HDS [FTP Sensor] is different.

Results 

• If it is abnormal, there is a problem with the FTP sensor.

EVAP Canister Inspection 

Preconditions 

• EVAP canister purge line is normal

Test Procedure 

• Preparation
• • The EVAP canister purge valve: removed with its connector and vacuum hose connected
  • EVAP canister vent shut valve: removed
• Procedure
• • Disconnect the vacuum hose (purge line) (A) from the EVAP canister purge valve (B) in the engine compartment, then connect the T-fitting (C), vacuum/pressure gauge, 0-4 inHg (D), and the vacuum pump/gauge, 0-30 inHg (E), to the vacuum hose as shown.
  • Slowly apply about 2 kPa (0.6 inHg, 15 mmHg) of vacuum to the hose.

Courtesy of HONDA, U.S.A., INC.

• Normal Conditions
• • The vacuum hose does not hold vacuum.

Results 

• If it is abnormal, there is a problem with the EVAP canister.

EVAP Canister Vent Shut Valve Inspection 

Test Procedure 

• If the other inspection item(s) indicated a normal condition, then it is determined that the remaining EVAP canister vent shut valve is the cause.

Results 

• There is a problem with the EVAP canister vent shut valve.