P2646
DTC P2646: VTEC System Stuck OFFSpecial Tools Required
- Pressure gauge adapter 07NAJ-P07010A
- A/T low pressure gauge w/panel 07406-0070300
- A/T pressure hose 07406-0020201
- A/T pressure hose, 2,210 mm 07MAJ-PY4011A
- A/T pressure adapter 07MAJ-PY40120
- Oil pressure hose 07ZAJ-S5A0200
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
1. Check the engine oil level.
Is the engine oil level OK?
Yes - Go to step 2.
NO - Adjust the engine oil to the proper level, then go to step 12.
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 EOP sensor, the rocker arm oil control solenoid, and the ECM/PCM.
NO - Go to step 5.
5. Turn the ignition switch OFF.
6. Remove the EOP sensor (A), install the special tools as shown, then attach the EOP sensor to the oil pressure gauge adapter (B).
NOTE: Install the sensor in the reverse order of removal with a new O-ring.
7. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle for 2 minutes.
8. Do the VTEC TEST in the INSPECTION MENU with the HDS.
9. Check the oil pressure.
Does the oil pressure increase to at least 30 kPa (4.3psi, 0.3kgf/sq.cm)?
Yes - Replace the EOP sensor, then go to step 10.
NO - Replace the rocker arm oil control valve, then go to step 10.
10. Turn the ignition switch OFF.
11. Reconnect all connectors.
12. Turn the ignition switch ON (II).
13. Reset the ECM/PCM with the HDS.
14. Do the ECM/PCM idle learn procedure.
15. Test-drive under these conditions:
- ECT SENSOR 1 above 167 degree F (75 degree C)
- A/T in D position (M/T in 3rd gear)
- ENGINE SPEED at 1,100 - 3,300 rpm
16. Check for Temporary DTCs or DTCs 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 rocker arm oil control solenoid, the EOP sensor, and the ECM/PCM, 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 17.
17. 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, check for poor connections or loose terminals at the rocker arm oil control solenoid, the EOP sensor, and the ECM/PCM, then go to step 1 and recheck. If the screen indicates NOT COMPLETED, go to step 15 and recheck.