Acura RL. Manual - part 484

4. Clear the DTC with the HDS.

5. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES - Intermittent failure, the system is OK at this time. Check for poor connections or loose
terminals at the FTP sensor, or the EVAP canister vent shut valve, and the PCM.

NO - Go to step 6.

6. Turn the ignition switch OFF.

7. Remove the EVAP canister vent shut valve from the EVAP canister (see EVAP CANISTER

PURGE VALVE REPLACEMENT ).

8. Connect the 2P connector to the EVAP canister vent shut valve.

9. Turn the ignition switch ON (II).

10. Do the EVAP CVS ON in the INSPECTION MENU with the HDS.

11. Check the EVAP canister vent shut valve (A) operation.

Fig. 22: Identifying EVAP Canister Vent Shut Valve
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Does the valve operate?

YES - Check the routing of the EVAP canister vent tube, then go to step 18.

NO - Go to step 12.

12. Turn the ignition switch OFF.

13. Replace the EVAP canister vent shut valve (see EVAP CANISTER PURGE VALVE

REPLACEMENT ).

14. Turn the ignition switch ON (II).

15. Reset the PCM with the HDS.

16. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

17. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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Page 21

Is the result OK?

YES - Go to step 23.

NO - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut
valve, and the PCM, then go to step 1.

18. Reinstall the EVAP canister vent shut valve.

19. Turn the ignition switch ON (II).

20. Reset the PCM with the HDS.

21. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

22. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES - Go to step 23.

NO - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut
valve, and the PCM, then go to step 1.

23. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0457 indicated?

YES - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut
valve, and the PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the
INDICATED DTCS TROUBLESHOOTING.

DTC P0496: EVAP SYSTEM HIGH PURGE FLOW

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES - Intermittent failure, the system is OK at this time. Check for poor connections or loose
terminals at the FTP sensor, the EVAP canister purge valve, or the EVAP canister vent shut valve and
the PCM.

NO - Go to step 4.

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot,
and review the general troubleshooting information (see GENERAL
TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

Friday, June 05, 2009 2:30:48 PM

Page 22

4. Turn the ignition switch OFF.

5. Replace the EVAP canister purge valve (see EVAP CANISTER PURGE VALVE

REPLACEMENT ).

6. Turn the ignition switch ON (II).

7. Reset the PCM with the HDS.

8. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).

9. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES - Go to step 10.

NO - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge
valve, or the EVAP canister vent shut valve and the PCM, then go to step 1.

10. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0496 indicated?

YES - Check for poor connections or loose terminals at the FTP sensor, the EVAP canister purge
valve, the EVAP canister vent shut valve, and the PCM, then go to step 1.

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the
INDICATED DTCS TROUBLESHOOTING.

DTC P0497: EVAP SYSTEM LOW PURGE FLOW

Special Tools Required



Vacuum/pressure gauge, 0-4 in.Hg, 07JAZ-001000B



Vacuum pump/gauge, 0-30 in.Hg, Snap-on YA4000A or equivalent, commercially available

1. Check the fuel fill cap (the cap must say "TIGHTEN TO CLICK"). It should turn 1/4 turn after it's

tight, then it clicks.

Is the correct fuel fill cap installed and properly tightened?

YES - Go to step 2.

NO - Replace or tighten the fuel fill cap, then go to step 25.

2. Turn the ignition switch ON (II).

3. Clear the DTC with the HDS.

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot,
and review the general troubleshooting information (see GENERAL
TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

Friday, June 05, 2009 2:30:48 PM

Page 23

4. Do the EVAP FUNCTION TEST in the INSPECTION MENU with the HDS.

Is the result OK?

NO - Go to step 5.

5. Check for a loose or damaged PCS line between the intake manifold and the EVAP canister purge

valve.

Is the line OK?

YES - Go to step 6.

NO - Reconnect or repair the PCS line, then go to step 25.

6. Disconnect the vacuum hose (A) from the EVAP canister purge valve joint (B) in the engine

compartment, and connect a T-fitting (C) from the vacuum gauge and the vacuum pump/gauge, 0-30
in.Hg, to the hose as shown.

Fig. 23: Identifying Vacuum Hose And EVAP Canister Purge Valve Joint
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Do the EVAP PCS ON in the INSPECTION MENU with the HDS.

8. Slowly apply about 0.6 in.Hg (15 mmHg) of vacuum to the hose.

Does it hold vacuum?

YES - Replace the EVAP canister purge valve, then go to step 24.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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