P2649

DTC P2649: Rocker Arm Oil Control Valve (VTEC Solenoid Valve) Circuit High Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.
4. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2649 indicated?

YES - Go to step 5.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the rocker arm oil control valve (VTEC solenoid valve) and the ECM.

5. Turn the ignition switch OFF.
6. Disconnect the rocker arm oil control solenoid (VTEC solenoid valve) 1P connector.




7. Measure resistance between the rocker arm oil control valve (VTEC solenoid valve) 1P connector terminal and body ground.

Is there 14 - 30 Ohm at room temperature?

YES - Go to step 8.

NO - Go to step 12.

8. Jump the SCS line with the HDS.
9. Disconnect ECM connector B (24P).




10. Connect the rocker arm oil control valve (VTEC solenoid valve) 1P connector terminal to body ground with a jumper wire.




11. Check for continuity between ECM connector terminal B6 and body ground.

Is there continuity?

YES - Go to step 19.

NO - Repair open in the wire between the ECM (B6) and the rocker arm oil control valve (VTEC solenoid valve), then go to step 13.

12. Replace the rocker arm oil control valve (VTEC solenoid valve).
13. Reconnect a II connectors.
14. Turn the ignition switch ON (II).
15. Reset the ECM with the HDS.
16. Do the ECM idle learn procedure.
17. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2649 is indicated, check for poor connections or loose terminals at the rocker arm oil control valve (VTEC solenoid valve) and the ECM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - Go to step 18.

18. Monitor the OBD STATUS for DTC P2649 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 16 and recheck.

19. Update the ECM if it does not have the latest software, or substitute a known-good ECM.
20. Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?

YES - If DTC P2649 is indicated, check for poor connections or loose terminals at the rocker arm oil control valve (VTEC solenoid valve) and the ECM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

NO - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM.