( TF09EABK72100092649FAAT00 )
DTC Troubleshooting: P2649 (21)
DTC P2649:
 Rocker Arm Oil Control Solenoid Circuit High Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
  1. Turn the ignition switch to ON (II).
  1. Clear the DTC with the HDS.
  1. Start the engine. Hold the engine speed at 3,000 rpm (min −1 ) without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2649 indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the rocker arm oil control solenoid and the ECM/PCM.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the rocker arm oil control solenoid 2P connector.
  1. At the solenoid side, measure the resistance between rocker arm oil control solenoid 2P connector terminals No. 1 and No. 2.
Is there 14−30 Ω at room temperature?
YES -
Go to Step 8 .
NO -
Go to Step 11 .
  1. Check for continuity between rocker arm oil control solenoid 2P connector terminal No. 2 and body ground.
Is there continuity?
YES -
Go to Step 9 .
NO -
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM/PCM connector B (49P).
  1. Check for continuity between ECM/PCM connector terminal B35 and rocker arm oil control solenoid 2P connector terminal No. 1.
Is there continuity?
YES -
Go to Step 19 .
NO -
Repair open in the wire between the ECM/PCM (B35) and the rocker arm oil control solenoid, then go to Step 13 .
  1. Reconnect all connectors.
  1. Turn the ignition switch to ON (II).
  1. Reset the ECM/PCM with the HDS.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2649 indicated?
YES -
Check for poor connections or loose terminals at the rocker arm oil control solenoid and the ECM/PCM, then go to Step 1 .
NO -
Go to Step 18 .
  1. Monitor the OBD STATUS for DTC P2649 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in Step 17 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, go to Step 1 and recheck. If the screen indicates NOT COMPLETED, keep idling until a result comes on.
  1. Reconnect all connectors.
  1. Start the engine, and let it idle.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P2649 indicated?
YES -
Check for poor connections or loose terminals at the rocker arm oil control solenoid and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to Step 21 . If the ECM/PCM was substituted, go to Step 1 .
NO -
Go to Step 23 .
  1. Monitor the OBD STATUS for DTC P2649 in the DTCs MENU with the HDS.
Does the screen indicate PASSED?
YES -
If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM. If any other Temporary DTCs or DTCs were indicated in Step 21 , go to the indicated DTC's troubleshooting.■
NO -
If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm oil control solenoid and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then go to Step 21 . If the ECM/PCM was substituted, go to Step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.