DTC P2649

DTC P2649  : Rocker Arm Oil Control Solenoid Circuit High Voltage

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Start the engine. Hold the engine speed at 3, 000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

   -4. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P2649 Rocker Arm Oil Control Solenoid Circuit High Voltage

   Is DTC P2649 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the rocker arm oil pressure switch, the rocker arm oil control solenoid, and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot .

2. Rocker arm oil control solenoid internal resistance check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Rocker arm oil control solenoid 2P connector

   -3. At the rocker arm oil control solenoid side, measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Rocker arm oil control solenoid 2P connector: disconnected
   Test point 1	Rocker arm oil control solenoid 2P connector No. 1 (rocker arm oil control solenoid side)
   Test point 2	Rocker arm oil control solenoid 2P connector No. 2 (rocker arm oil control solenoid side)

   Courtesy of HONDA, U.S.A., INC.

   Is there 14-30 Ω at room temperature?

   YES 

   Go to step 3.

   NO 

   Replace the rocker arm oil control valve .

3. Open wire check (PG line)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Rocker arm oil control solenoid 2P connector: disconnected
   Test point 1	Rocker arm oil control solenoid 2P connector No. 1
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The PG line is OK. Go to step 4.

   NO 

   Repair an open in the PG wire between the rocker arm oil control solenoid and the G101.

4. Shorted wire check (VT SOL line)

   -1. Jump the SCS line with the HDS.

   -2. Disconnect the following connector.

   PCM connector C (51P)

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Rocker arm oil control solenoid 2P connector: disconnected
   	PCM connector C (51P): disconnected
   Test point 1	PCM connector C (51P) No. 43
   Test point 2	Rocker arm oil control solenoid 2P connector No. 2

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The VT SOL wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P2649 goes away and the PCM was updated, troubleshooting is complete. If DTC P2649 goes away and the PCM was substituted, replace the original PCM .

   NO 

   Repair an open in the VT SOL wire between the rocker arm oil control solenoid and the PCM (C43).