Acura TSX / Honda Accord CL. Manual — part 635

Fig. 10: Measuring Voltage Between CMP Sensor A 3P Connector Terminals No. 2 & No. 3

11. Measure voltage between ECM/PCM connector terminal A19 and body ground.

Is there about 5 V?

YES: Repair open in the wire between the ECM/PCM (A19) and CMP Sensor A, then go to
step 19 .

NO: Go to step 12.

2004 Acura TSX

2004 ENGINE PERFORMANCE VTEC/VTC - TSX

Fig. 11: Measuring Voltage Between ECM/PCM Connector Terminal A19 & Body Ground

12. Turn the ignition switch OFF.

13. Jump the SCS line with the HDS.

14. Disconnect ECM/PCM connector A (31P).

15. Check for continuity between ECM/PCM connector terminal A19 and body ground.

Is there continuity?

YES: Repair short in the wire between the ECM/PCM (A19) and CMP Sensor A, then go to
step 18 .

NO: Go to step 23 .

2004 Acura TSX

2004 ENGINE PERFORMANCE VTEC/VTC - TSX

Fig. 12: Checking For Continuity Between ECM/PCM Connector Terminal A19 & Body Ground

16. Turn the ignition switch OFF.

17. Replace CMP Sensor A (see CMP SENSOR A REPLACEMENT ).

18. Turn the ignition switch ON (II).

19. Reset the ECM/PCM with the HDS.

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

21. Start the engine.

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

Are any Temporary DTCs or DTCs indicated?

YES: If DTC P0340 is indicated, check for poor connections or loose terminals at CMP

2004 Acura TSX

2004 ENGINE PERFORMANCE VTEC/VTC - TSX

Sensor A 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: Troubleshooting is complete.

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

ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING ).

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

Are any Temporary DTCs or DTCs indicated?

YES: If DTC P0340 is indicated, check for poor connections or loose terminals at CMP
Sensor A 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 P0341: CMP SENSOR & CKP SENSOR INCORRECT PHASE DETECTED

1. Turn the ignition switch ON (II).

2. Clear the DTC with the HDS.

3. Test-drive at a steady speed between 19-38 MPH (30-60 km/h) for 10 minutes.

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

Is DTC P0341 indicated?

YES: Go to step 9 .

NO: Go to step 5.

5. Do the VTC TEST in the INSPECTION MENU with the HDS.

Is the result OK?

YES: Go to step 6.

NO: Go to step 9 .

6. Test-drive at a steady speed between 19-38 MPH (30-60 km/h) for 10 minutes.

7. Check the VTC STATUS in the DATA LIST with the HDS.

Does it indicate ON?

YES: Go to step 8.

NO: Go to step 6 and recheck.

8. Monitor the OBD STATUS for DTC P0341 in the DTCs MENU with the HDS.

Does the screen indicate FAILED?

YES: Go to step 9.

NO: If the screen indicates PASSED, intermittent failure, system is OK at this time. If the
screen indicates NOT COMPLETED, go to step 6 and recheck.

9. Turn the ignition switch OFF.

10. Test the VTC oil control solenoid valve (see VTC OIL CONTROL SOLENOID VALVE

REMOVAL/TEST/INSTALLATION ).

2004 Acura TSX

2004 ENGINE PERFORMANCE VTEC/VTC - TSX