Acura RL. Manual - part 482

YES - Go to step 21.

NO - Go to step 16.

16. Turn the ignition switch OFF.

17. Jump the SCS line with the HDS.

18. Disconnect PCM connector E (31P).

19. Connect FTP sensor 3P connector terminal No. 3 to body ground with a jumper wire.

Fig. 14: Connecting FTP Sensor 3P Connector Terminal No. 3 To Body Ground With Jumper
Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

20. Check for continuity between PCM connector terminal E1 and body ground.

Fig. 15: Checking Continuity Between PCM Connector Terminal E1 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 33.

NO - Repair open in the wire between the PCM (El) and the FTP sensor, then go to step 27.

21. Turn the ignition switch OFF.

22. Connect PCM connector terminals E1 and E29 with a jumper wire.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 13

Fig. 16: Connecting PCM Connector Terminals E1 And E29 With Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

23. Turn the ignition switch ON (II).

24. Check the FTP SENSOR in the DATA LIST with the HDS.

Is about 7.3 kPa (2.16 in.Hg, 55 mmHg), or 4.7 V or more indicated?

YES - Go to step 33.

NO - Repair open in the wire between the PCM (E29) and the FTP sensor, then go to step 27.

25. Turn the ignition switch OFF.

26. Replace the FTP sensor (see FTP SENSOR REPLACEMENT ).

27. Reconnect all connectors.

28. Turn the ignition switch ON (II).

29. Reset the PCM with the HDS.

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

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

Is DTC P0453 indicated?

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

NO - Go to step 32.

32. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 31,
go to the INDICATED DTCS TROUBLESHOOTING.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor
and the PCM, then go to step 1. If the screen indicates NOT COMPLETED, keep idling until a result
comes on.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 14

33. Reconnect all connectors.

34. Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or substitute a

known-good PCM (see SUBSTITUTING THE PCM ).

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

Is DTC P0453 indicated?

YES - Check for poor connections or loose terminals at the FTP sensor and the PCM. If the PCM was
updated, substitute a known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the
PCM was substituted, go to step 1.

NO - Go to step 36.

36. Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS.

Does the screen indicate PASSED?

YES - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the
original PCM (see PCM REPLACEMENT ). If any other Temporary DTCs or DTCs were indicated
in step 35, go to the INDICATED DTCS TROUBLESHOOTING.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the FTP sensor
and the PCM. If the PCM was updated, substitute a known-good PCM (see SUBSTITUTING THE
PCM ), then recheck. If the PCM was substituted, go to step 1. If the screen indicates NOT
COMPLETED, keep idling until a result comes on.

DTC P0455: EVAP SYSTEM LARGE LEAK DETECTED; DTC P0456: EVAP SYSTEM VERY
SMALL LEAK DETECTED

Special Tools Required



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



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

NOTE:

The fuel system is designed to allow specified maximum vacuum and
pressure conditions. Do not deviate from the vacuum and pressure tests as
indicated in these procedures. Excessive pressure/vacuum would damage
the EVAP components or cause eventual fuel tank failure.

NOTE:



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



Fresh fuel has a higher volatility that will create greater
pressure/vacuum. The optimum condition for testing is less than a full
tank of fresh fuel. If possible, to assist in leak detection, add 1 gallon of
fresh fuel to the tank (as long as it will not fill the tank), just before
starting these procedures.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 15

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 24.

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. 17: Identifying Fuel Fill Cap Seal And Fuel Fill Pipe Mating Surface
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 24.

NO - Go to step 3.

3. Turn the ignition switch ON (II).

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, the EVAP canister purge valve, or the EVAP canister vent shut valve and
the PCM.

NO - Go to step 6.

6. Turn the ignition switch OFF.

7. Turn the ignition switch ON (II).

8. Check for a poor connection or damage at the fuel tank vapor recirculation tube.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 16

Content .. 480 481 482 483 ..