Dtc P2647: Vtec Oil Pressure Switch Circuit High Voltage - Acura TSX 2004 Manual

21. Turn the ignition switch ON (II).
22. Reset the ECM/PCM with the HDS.
23. Do the ECM/PCM idle learn procedure (see ECM/PCM IDLE LEARN PROCEDURE ).
24. Do the VTEC TEST in the INSPECTION MENU with the HDS.
25. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES: If DTC P2646 is indicated, check for poor connections or loose terminals at the VTEC
oil pressure switch, the VTEC solenoid valve, 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 26.
26. Monitor the OBD STATUS for DTC P2646 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES: Troubleshooting is complete.
NO: If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates NOT
COMPLETED, go to step 24 and recheck.
27. 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 ).
28. Do the VTEC TEST in the INSPECTION MENU with the HDS.
29. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES: If DTC P2646 is indicated, check for poor connections or loose terminals at the VTEC
oil pressure switch, the VTEC solenoid valve, 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 P2647: VTEC OIL PRESSURE SWITCH CIRCUIT HIGH VOLTAGE

1. Check the engine oil level.
Is the level OK?
YES: Go to step 2.
NO: Adjust the engine oil to the proper level, then go to step 14 .
2. Turn the ignition switch ON (II).
3. Clear the DTC with the HDS.
4. Do the VTEC TEST in the INSPECTION MENU with the HDS.
Is the result OK?
YES: Intermittent failure, system is OK at this time. Check for poor connections or loose
terminals at the VTEC oil pressure switch and the ECM/PCM.
NO: Go to step 5.
Wednesday, March 12, 2008 2:17:58 AM
2004 Acura TSX
2004 ENGINE PERFORMANCE VTEC/VTC - TSX
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