DTC Troubleshooting: P2646 (22)
|DTC P2646:|| VTEC System Stuck OFF|
Special Tools RequiredLow pressure gauge ( 07406-0070002)
Oil pressure gauge attachment ( 07NAJ-P070100)
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 2.
NO - Adjust the engine oil to the proper level, then go to 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.n
NO - Go to 5.
|5.||Turn the ignition switch OFF.|
|6.||Remove the EOP sensor (A), install the special tools as shown, then install the EOP sensor in the oil pressure gauge attachment (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 (min-1) 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.|
|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.|
|15.||Test-drive under these conditions:|
- ECT SENSOR 1 above 75 °C (167 °F)
- A/T in D position (M/T in 3rd gear)
- Engine speed between 1,100-3,300 rpm (min-1)
|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 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Go to 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.n
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 1 and recheck. If the screen indicates NOT COMPLETED, go to 15 and recheck.