Acura RL. Manual - part 480

Fig. 7: Checking Continuity Between PCM Connector Terminal B2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 23.

NO - Repair open in the wire between the EVAP canister purge valve and the PCM (B2), then go to
step 25.

23. At the valve side, measure resistance between EVAP canister purge valve 2P connector terminals No.

1 and No. 2.

Fig. 8: Measuring Resistance Between EVAP Canister Purge Valve 2P Connector Terminals No.
1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 33 ohms at room temperature?

YES - Go to step 31.

NO - Go to step 24.

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

REPLACEMENT ).

25. Reconnect all connectors.

26. Turn the ignition switch ON (II).

27. Reset the PCM with the HDS.

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

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 5

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

Is DTC P0443 indicated?

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

NO - Go to step 30.

30. Monitor the OBD STATUS for DTC P0443 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 29,
go to the INDICATED DTCS TROUBLESHOOTING.

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

31. Reconnect all connectors.

32. 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 ).

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

Is DTC P0443 indicated?

YES - Check for poor connections or loose terminals at the EVAP canister purge valve 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 34.

34. Monitor the OBD STATUS for DTC P0443 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 33, go to the INDICATED DTCS TROUBLESHOOTING.

NO - If the screen indicates FAILED, check for poor connections or loose terminals at the EVAP
canister purge valve 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 P0451: FTP SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM

NOTE:



Before you troubleshoot, record all freeze data and any on-board

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 6

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Start the engine, and let it idle 1 minute.

4. Monitor the OBD STATUS for DTC P0451 in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES - Go to step 5.

NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for
poor connections or loose terminals at the FTP sensor and the PCM. If the screen indicates NOT
COMPLETED, go to step 3 and recheck.

5. Turn the ignition switch OFF.

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

7. Turn the ignition switch ON (II).

8. Reset the PCM with the HDS.

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

10. Start the engine, and let it idle 1 minute.

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

Is DTC P0451 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 12.

12. Monitor the OBD STATUS for DTC P0451 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 11,
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, go to step 10.

DTC P0452: FTP SENSOR CIRCUIT LOW VOLTAGE

snapshot, and review the general troubleshooting information (see
GENERAL TROUBLESHOOTING INFORMATION ).



If DTC P2422 is stored at the same time as DTC P0451, troubleshoot
DTC P2422 first, then recheck for DTC P0451.

NOTE:

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

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 7

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch OFF.

4. Remove the fuel fill cap.

5. Turn the ignition switch ON (II).

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

Is about - 7.3 kPa (-2.16 in.Hg, - 55 mmHg), or 0.3 V or less indicated?

YES - Go to step 10.

NO - Go to step 7.

7. Install the fuel fill cap.

8. Start the engine.

9. Monitor the OBD STATUS for DTC P0452 in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES - Go to step 10.

10. Turn the ignition switch OFF.

11. Disconnect the FTP sensor 3P connector.

12. Turn the ignition switch ON (II).

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

Is about 7.3 kPa (2.15 in.Hg, 54.7 mmHg), or 4.90 V indicated?

YES - Go to step 20.

NO - Go to step 14.

14. Measure voltage between FTP sensor 3P connector terminal No. 1 and body ground.

TROUBLESHOOTING INFORMATION ).

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

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