Acura TSX / Honda Accord CL. Manual - part 544

24. Turn the ignition switch ON (II).  

25. Reset the ECM/PCM with the HDS.  

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

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

Are any Temporary DTCs or DTCs indicated? 

YES: If DTC P0452 is indicated, check for poor connections or loose terminals at the FTP 
sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are 
indicated, go to the indicated DTC troubleshooting.  

NO: Go to step 28.  

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

Does the screen indicate PASSED? 

YES: Troubleshooting is complete.  

NO: If the screen indicates FAILED, check for poor connections or loose terminals at the 
FTP sensor and the ECM/PCM, then go to step 1 . If the screen indicates NOT 
COMPLETED, go to step 26 and recheck.  

29. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see 

HOW TO SUBSTITUTE THE ECM/PCM ).  

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

Are any Temporary DTCs or DTCs indicated? 

YES: If DTC P0452 is indicated, check for poor connections or loose terminals at the FTP 
sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are 
indicated, go to the indicated DTC troubleshooting.  

NO: If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was 
substituted, replace the original ECM/PCM (see HOW TO REMOVE THE ECM/PCM 
FOR TESTING ).  

DTC P0453: FTP SENSOR CIRCUIT HIGH VOLTAGE 

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 (55 mm Hg, 2.16 in. Hg), 4.7 V, or more 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. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE EVAP System - TSX

  

 

Does the screen indicate FAILED? 

YES: Go to step 10.  

NO: If the screen indicates PASSED, intermittent failure, system is OK at this time. Check 
for poor connections or loose terminals at the FTP sensor and ECM/PCM. If the screen 
indicates NOT COMPLETED, go to step 6 and recheck.  

10. Turn the ignition switch OFF.  

11. Disconnect the FTP sensor 3P connector.  

12. Turn the ignition switch ON (II).  

13. Measure voltage between FTP sensor 3P connector terminal No. 2 and body ground. 

Is there about 5 V? 

YES: Go to step 14.  

NO: Go to step 15 .  

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE EVAP System - TSX

  

 

Fig. 17: Measuring Voltage Between FTP Sensor 3P Connector Terminal No. 2 & Body 
Ground 

14. Measure voltage between FTP sensor 3P connector terminals No. 1 and No. 3. 

Is there about 5 V? 

YES: Go to step 20 .  

NO: Repair open in the wire between the ECM/PCM (E4) and the FTP sensor, then go to 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE EVAP System - TSX

  

 

step 23 .  

Fig. 18: Measuring Voltage Between FTP Sensor 3P Connector Terminals No. 1 & No. 3 

15. Turn the ignition switch OFF.  

16. Jump the SCS line with the HDS.  

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

18. Connect FTP sensor connector terminal No. 2 to body ground with a jumper wire. 

 

2004 Acura TSX 

2004 ENGINE PERFORMANCE EVAP System - TSX