DTC P2649

DTC P2649  : Rocker Arm Oil Control Solenoid A (Bank 1) 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.

   -4. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.

   -5. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P2649 Rocker Arm Oil Control Solenoid A (Bank 1) 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 rocker arm oil control solenoid A (Bank 1) and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot .

2. Rocker arm oil control solenoid A (Bank 1) internal resistance check

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

   -2. Disconnect the following connector.

   Rocker arm oil control solenoid A (Bank 1) 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 A (Bank 1) 2P connector: disconnected
   Test point 1	Rocker arm oil control solenoid A (Bank 1) 2P connector (male terminals) No. 1 (solenoid side):
   Test point 2	Rocker arm oil control solenoid A (Bank 1) 2P connector (male terminals) No. 2 (solenoid side):

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

   Is there 13.9-16.9 Ω at room temperature?

   YES 

   Go to step 3.

   NO 

   Replace the rear rocker arm oil control valve .

3. Open wire check (VTSB1 PG/PG line)

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

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

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

   Is there continuity?

   YES 

   The VTSB1 PG/PG line is OK. Go to step 4.

   NO 

   Repair an open in the VTSB1 PG/PG wire between rocker arm oil control solenoid A (Bank 1) and G101.

4. Open wire check (VTSB1 line)

   -1. Jump the SCS line with the HDS, and wait more than 1 minute.

   -2. Disconnect the following connector.

   PCM connector E (80P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Rocker arm oil control solenoid A (Bank 1) 2P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	Rocker arm oil control solenoid A (Bank 1) 2P connector (female terminals) No. 2:
   Test point 2	PCM connector E (80P) No. 79

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

   Is there continuity?

   YES 

   The VTSB1 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM , then recheck. If DTC P2649 goes away and the PCM was substituted, replace the original PCM .

   NO 

   Repair an open in the VTSB1 wire between the PCM (E79) and rocker arm oil control solenoid A (Bank 1).