Acura RL. Manual - part 486

Fig. 27: Measuring Voltage Between EVAP Canister Vent Shut Valve 2P Connector Terminal
No. 2 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there battery voltage?

YES - Go to step 10.

NO - Repair open in the wire between the EVAP canister vent shut valve and the A/F sensor relay
(LAF), then go to step 19.

10. Turn the ignition switch OFF.

11. At the valve side, measure resistance between EVAP canister vent shut valve 2P connector terminals

No. 1 and No. 2.

Fig. 28: Measuring Resistance Between EVAP Canister Vent Shut Valve 2P Connector
Terminals No. 1 And No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there about 25-30 ohms at room temperature?

YES - Go to step 12.

NO - Go to step 18.

12. Turn the ignition switch OFF.

13. Jump the SCS line with the HDS.

14. Disconnect PCM connector E (31P).

15. Check for continuity between PCM connector terminal E10 and body ground.

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 29

Fig. 29: Checking Continuity Between PCM Connector Terminal E10 And Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Repair short in the wire between the EVAP canister vent shut valve and the PCM (E10), then
go to step 19.

NO - Go to step 16.

16. Connect EVAP canister vent shut valve 2P connector terminal No. 1 to body ground with a jumper

wire.

Fig. 30: Connecting EVAP Canister Vent Shut Valve 2P Connector Terminal No. 1 To Body
Ground With A Jumper Wire
Courtesy of AMERICAN HONDA MOTOR CO., INC.

17. Check for continuity between PCM connector terminal E10 and body ground.

Fig. 31: Checking Continuity Between PCM Connector Terminal E10 And Body Ground

2007 Acura RL

2005-08 ENGINE PERFORMANCE EVAP System - RL

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

Page 30

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES - Go to step 25.

NO - Repair open in the wire between the EVAP canister vent shut valve and the PCM (E10), then go
to step 19.

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

REPLACEMENT ).

19. Reconnect all connectors.

20. Turn the ignition switch ON (II).

21. Reset the PCM with the HDS.

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

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

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

Is DTC P0498 indicated?

YES - Check for poor connections or loose terminals at 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.

25. Reconnect all connectors.

26. 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 ).

27. Select EVAP CVS ON in the INSPECTION MENU with the HDS.

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

Is DTC P0498 indicated?

YES - Check for poor connections or loose terminals at the EVAP canister vent shut 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 - 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 are indicated,
go to the INDICATED DTCS TROUBLESHOOTING.

DTC P0499: EVAP CANISTER VENT SHUT VALVE CONTROL CIRCUIT HIGH VOLTAGE

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 31

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Select EVAP CVS ON in the INSPECTION MENU with the HDS.

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

Is DTC P0499 indicated?

DTC P1454: FTP SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM; DTC P2422: EVAP
CANISTER VENT SHUT VALVE CLOSE MALFUNCTION

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, and wait 1 minute.

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

Is it between - 0.67 kPa and 0.67 kPa (- 0.2-0.2 in.Hg, -5-5 mmHg), or 2.4-2.6 V?

YES - Go to step 6.

NO - Go to step 17.

6. Install the fuel fill cap.

7. Clear the DTC with the HDS.

8. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park on neutral) until the

radiator fan comes on, then let it idle.

9. Monitor the OBD STATUS for DTC P1454 in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES - Go to step 10.

NO - If the screen indicates PASSED, intermittent failure, the system is OK at this time, check for a
poor connections or loose terminals at the FTP sensor or the EVAP canister vent shut valve and the
PCM. If the screen indicates NOT COMPLETED, go to step 8 and recheck.

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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