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Acura RL. Manual - part 483

Is the tube OK?

YES - Go to step 9.

NO -



Replace the fuel tank vapor recirculation tube, then go to step 24.



If necessary, replace the fuel tank (see FUEL TANK REPLACEMENT ), then go to step 24.

9. Remove the trunk floor trim panel.

10. Remove the EVAP access panel from the floor.

11. Disconnect the fuel tank vapor recirculation tube (A) from the EVAP canister (B), and plug the EVAP

canister port (C).

Fig. 18: Identifying Fuel Tank Vapor Recirculation Tube, EVAP Canister And EVAP Canister
Port
Courtesy of AMERICAN HONDA MOTOR CO., INC.

12. Disconnect the vacuum hose (purge line) from the EVAP canister purge valve (A) in the engine

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

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 17

Fig. 19: Identifying EVAP Canister Purge Valve And T-Fitting
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

14. Apply vacuum to the hose until the FTP reads 1.90 V (0.59 in.Hg,-15.1 mmHg).

15. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS.

Does the voltage rise less than 0.2 V (0.1 in.Hg, 0.5 mmHg)?

YES - Go to step 21.

NO - Go to step 16.

16. Do the EVAP CVS OFF in the INSPECTION MENU with the HDS.

17. Disconnect the fresh air hose (A) from the EVAP canister vent shut valve (B), and plug the EVAP

canister vent shut valve ports (C).

Fig. 20: Identifying EVAP Canister Vent Shut Valve Ports And Fresh Air Hose
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 18

18. Apply vacuum to the hose (disconnected in step 10) until the FTP reads 1.90 V (-0.59 in.Hg, - 15.1

mmHg).

19. Monitor the FTP SENSOR in the DATA LIST for 1 minute with the HDS.

Does the voltage rise less than 0.2 V (0.1 in.Hg, 2.5 mmHg)?

YES - Replace the EVAP canister vent shut valve, then go to step 23.

NO - Go to step 20.

20. Check for a loose or damaged PCS line between the EVAP canister and the EVAP canister purge

valve.

Is the line OK?

YES - Replace the following parts, then go to step 23.



FTP sensor O-ring



EVAP canister vent shut valve case and O-ring



EVAP canister

NO - Reconnect or repair the PCS hose, then go to step 23.

21. Do the EVAP CVS OFF in the INSPECTION MENU with the HDS.

22. Check these parts for looseness or damage.



Fuel fill pipe



Fuel vapor return pipe

Are the parts OK?

YES - Check the fuel tank unit base gasket (see FUEL PUMP/FUEL GAUGE SENDING UNIT
REPLACEMENT ), and check the fuel tank, then go to step 23.

NO - Repair or replace the damaged part(s), then go to step 21.

23. Reconnect all hoses and connectors.

24. Turn the ignition switch ON (II).

25. Reset the PCM with the HDS.

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

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

Is the result OK?

YES - Go to step 28.

NO - 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.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 19

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

Is DTC P0455 and/or P0456 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 P0457: EVAP SYSTEM LEAK DETECTED/FUEL FILL CAP LOOSE OR MISSING

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 cap, then go to step 19.

2. Check the fuel fill cap seal (A) and the fuel fill pipe mating surface (B). Verify that the fuel fill cap

tether cord (C) is not caught under the cap.

Fig. 21: Identifying Fuel Fill Cap Seal And Fuel Fill Cap Tether Cord
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is the fuel fill cap seal missing or damaged, is the fuel fill pipe damaged, or is the tether cord caught
under the cap?

YES - Replace the fuel fill cap or the fuel fill pipe, then go to step 19.

NO - Go to step 3.

3. Turn the ignition switch ON (II).

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

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