DTC P2647
DTC P2647 : Rocker Arm Oil Pressure Switch A (Bank 1) Circuit High Voltage
- If DTC P2648 and/or P2649 are stored at the same time as DTC P2647, troubleshoot those DTCs first, then recheck for DTC P2647.
| DTC Description | Confirmed DTC | Pending DTC | Freeze Frame |
|---|---|---|---|
| P2647 Rocker Arm Oil Pressure Switch A (Bank 1) Circuit High Voltage |
DTC (PGM-FI)
- Oil level check
-1. Check the engine oil level.
Is the level OK?
YES
Go to step 2.
NO
Go to step 2, and check the result. Then adjust the engine oil to the proper level , and recheck. If the failure is duplicated in step 2, go to step 3.
- Problem verification
-1. Turn the vehicle to the ON mode.
- 2. Clear the DTC with the HDS.
- 3. Select the VTEC+VCM TEST in the INSPECTION MENU with the HDS, then select the VEB VTEC TEST with the HDS.
VEB VTEC TEST
Does the HDS indicate Normal?
YES
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at rocker arm oil pressure switch A (Bank 1) 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.
NO
The failure is duplicated. Go to step 3.
- Rocker arm oil pressure switch A (Bank 1) internal circuit check
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connector.
Rocker arm oil pressure switch A (Bank 1) 2P connector - Refer to: Rocker Arm Oil Pressure Switch A (Bank 1) Removal and Installation, or Rocker Arm Oil Pressure Switch B (Bank 1) Removal and Installation, or Rocker Arm Oil Pressure Switch A (Bank 2) Removal and Installation - 3. At the rocker arm oil pressure switch side, check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Rocker arm oil pressure switch A (Bank 1) 2P connector: disconnected Test circuit VTMB1, VTMB1 LG Test point 1 Rocker arm oil pressure switch A (Bank 1) 2P connector No. 1 (rocker arm oil pressure switch side) Test point 2 Rocker arm oil pressure switch A (Bank 1) 2P connector No. 2 (rocker arm oil pressure switch side) Is there continuity?
YES
Go to step 4.
NO
Replace rocker arm oil pressure switch A (Bank 1) - Refer to: Rocker Arm Oil Pressure Switch A (Bank 1) Removal and Installation, or Rocker Arm Oil Pressure Switch B (Bank 1) Removal and Installation, or Rocker Arm Oil Pressure Switch A (Bank 2) Removal and Installation .
- Open wire check (VTMB1 line)
-1. Jump the SCS line with the HDS.
- 2. Disconnect the following connector.
- 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Rocker arm oil pressure switch A (Bank 1) 2P connector: disconnected PCM connector C (51P): disconnected Test circuit VTMB1 Test point 1 Rocker arm oil pressure switch A (Bank 1) 2P connector No. 2 (PUR) Test point 2 PCM connector C (51P) No. 22 (PUR) Is there continuity?
YES
Go to step 5.
NO
Repair an open in the VTMB1 wire between the PCM (C22) and rocker arm oil pressure switch A (Bank 1).
- Open wire check (VTMB1 LG line)
-1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Rocker arm oil pressure switch A (Bank 1) 2P connector: disconnected Test circuit VTMB1 LG Test point 1 Rocker arm oil pressure switch A (Bank 1) 2P connector No. 1 (BRN) Test point 2 Body ground Is there continuity?
YES
The VTMB1 LG wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2016), or PCM Removal and Installation (2014 2015) .
NO
Repair an open in the VTMB1 LG wire between rocker arm oil pressure switch A (Bank 1) and G101.