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 .

1. Turn the ignition switch ON (II).

1. Clear the DTC with the HDS.

1. 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 .

1. Check the result of Step 4 .
   - VTEC Switch Failure
   - VTEC Switch Open
   - VTEC Switch SIG Line Open
   - VTEC Switch GND Line Open

Does the test result any of the above?

YES | - | Go to Step 6 .
NO | - | Check for poor connections or loose terminals at the VTEC oil pressure switch. If it is OK, replace the VTEC solenoid valve, then, go to Step 14 .

1. Turn the ignition switch OFF.

1. Disconnect the VTEC oil pressure switch 2P connector.

1. At the VTEC oil pressure switch, check for continuity between VTEC oil pressure switch 2P connector terminals No. 1 and No. 2.

Is there continuity?

YES | - | Go to Step 9 .
NO | - | Replace the VTEC oil pressure switch, then go to Step 13 .

1. Turn the ignition switch ON (II).