Acura TSX / Honda Accord CL. Manual - part 547

NO: Go to step 13.  

13. Remove the FTP sensor with its connector connected (see FTP SENSOR REPLACEMENT ).  

14. Connect a T-fitting (A) from the vacuum gauge and the vacuum pump to the FTP sensor (B) as shown. 

Fig. 25: Connecting A T-Fitting From The Vacuum Gauge & The Vacuum Pump To The FTP 
Sensor 

15. Slowly apply about 0.4 in. Hg (10 mm Hg) of vacuum to the hose.  

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

Is the difference more than 1.1 kPa (8 mm Hg, 0.31 in. Hg) before and after applying 
vacuum? 

YES: Go to step 17.  

NO: Replace the FTP sensor (see FTP SENSOR REPLACEMENT ), then go to step 22 .  

17. Reconnect the vacuum hose to the PCS/CPV line (EVAP canister side) and reinstall the FTP sensor.  

18. Disconnect the vacuum hose (A) from the PCS/CPV line (EVAP canister purge valve side), and connect a 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE EVAP System - TSX

  

 

vacuum pump to the hose. 

Fig. 26: Disconnecting The Vacuum Hose From The PCS/CPV Line 

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

20. Slowly apply about 0.6 in. Hg (15 mm Hg) of vacuum to the hose. 

Does the hose hold vacuum? 

YES: Check for blockage at the EVAP canister port, then go to step 21.  

NO: Replace the EVAP canister vent shut valve, then go to step 21.  

21. Install the FTP sensor (see FTP SENSOR REPLACEMENT ).  

22. Reconnect all hoses.  

23. Turn the ignition switch ON (II).  

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE EVAP System - TSX

  

 

24. Reset the ECM/PCM with the HDS.  

25. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).  

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

Is the result OK? 

YES: Troubleshooting is complete.  

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 ECM/PCM, then go to step 1 .  

DTC P0498: EVAP CANISTER VENT SHUT VALVE CIRCUIT LOW VOLTAGE 

1. Turn the ignition switch ON (II).  

2. Clear the DTC with the HDS, then wait 5 seconds.  

3. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. 

Is DTC P0498 indicated? 

YES: Go to step 6 .  

NO: Go to step 4.  

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

5. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS. 

Is DTC P0498 indicated? 

YES: Go to step 6.  

NO: Intermittent failure, system is OK at this time. Check for poor connections or loose 
terminals at the EVAP canister vent shut valve and the ECM/PCM.  

6. Turn the ignition switch OFF.  

7. Disconnect the EVAP canister vent shut valve 2P connector.  

8. Measure resistance between EVAP canister vent shut valve 2P connector terminals No. 1 and No. 2. 

Is there about 25-30 ohm at room temperature? 

YES: Go to step 9.  

NO: Go to step 12 .  

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE EVAP System - TSX

  

 

Fig. 27: Measuring Resistance Between EVAP Canister Vent Shut Valve 2P Connector Terminals 
No. 1 & No. 2 

9. Jump the SCS line with the HDS.  

10. Disconnect ECM/PCM connector E (31P).  

11. Check for continuity between ECM/PCM connector terminal E19 and body ground. 

Is there continuity? 

YES: Repair short in the wire between the EVAP canister vent shut valve and the 
ECM/PCM (E19), then go to step 13 .  

NO: Go to step 20 .  

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE EVAP System - TSX