Acura RL. Manual - part 855

15. Reset the PCM with the HDS.  

16. Do the PCM idle learn procedure (see PCM IDLE LEARN PROCEDURE ).  

17. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the 

radiator fan comes on, then let it idle.  

18. 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 (VTEC 
solenoid valve) and the PCM, then go to step 1. 

NO -Go to step 19. 

19. 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 18, 
go to the indicated DTCs troubleshooting. 

NO -If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm 
oil control solenoid (VTEC solenoid valve) and the PCM, then go to step 1. If the screen indicates 
NOT COMPLETED, keep idling until a result comes on. 

20. Reconnect all connectors.  

21. Update the PCM if it does not have the latest software (see UPDATING THE PCM ), or substitute a 

known-good PCM (see SUBSTITUTING THE PCM ).  

22. 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 (VTEC 
solenoid valve) and the PCM. If the PCM was updated, substitute a known-good PCM (see 
SUBSTITUTING THE PCM ), then recheck. If the PCM was substituted, go to step 1. 

NO -Go to step 23. 

23. Monitor the OBD STATUS for DTC P2649 in the DTCs MENU with the HDS. 

Does the screen indicate PASSED?  

YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the 
original PCM (see PCM REPLACEMENT ). If any other Temporary DTCs or DTCs were indicated 
in step 21, go to the indicated DTCs troubleshooting. 

NO -If the screen indicates FAILED, check for poor connections or loose terminals at the rocker arm 
oil control solenoid (VTEC solenoid valve) and the PCM. If the PCM was updated, substitute a 
known-good PCM (see SUBSTITUTING THE PCM ), then recheck. If the PCM was substituted, go 
to step 1. If the screen indicates NOT COMPLETED, keep idling until a result comes on.

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE VTEC - RL

  

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ROCKER ARM OIL CONTROL SOLENOID (VTEC SOLENOID VALVE) 
TEST 

1. Disconnect the rocker arm oil control solenoid (VTEC solenoid valve) connector.  

2. Measure resistance between the rocker arm oil control solenoid (VTEC solenoid valve) 1P connector 

terminal (A) and body ground. 



If the resistance is as specified, go to step 3.  



If the resistance is not as specified, replace the rocker arm oil control solenoid (VTEC solenoid 
valve).  

Resistance: 14-30 ohms  

Fig. 12: Measuring Resistance Between Rocker Arm Oil Control Solenoid 1P Connector 
Terminal And Body Ground 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

3. Remove the rocker arm oil control solenoid (VTEC solenoid valve)/oil filter assembly (A) from the 

oil pump, and check the rocker arm oil control solenoid (VTEC solenoid valve) filter (B) for a 
restriction. If there is a restriction, replace the rocker arm oil control solenoid (VTEC solenoid valve) 
filter, the engine oil filter, and the engine oil. 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE VTEC - RL

  

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© 2005 Mitchell Repair Information Company, LLC. 

Fig. 13: Identifying Oil Filter Assembly And Rocker Arm Oil Control Solenoid Filter With 
Torque Specifications 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

4. If the filter is not restricted, remove the rocker arm oil control solenoid (VTEC solenoid valve) (A) 

and push the valve (B) with your finger to check its movement. If the valve moves freely, it is normal, 
check the engine oil pressure (see OIL PRESSURE TEST ). If the valve binds or sticks, replace the 
rocker arm oil control solenoid (VTEC solenoid valve) assembly. 

Fig. 14: Identifying Rocker Arm Oil Control Solenoid And Valve With Torque Specifications 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

ROCKER ARM OIL CONTROL SOLENOID (VTEC SOLENOID VALVE) 
REPLACEMENT 

1. Disconnect the rocker arm oil control solenoid (VTEC solenoid valve) connector (A). 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE VTEC - RL

  

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© 2005 Mitchell Repair Information Company, LLC. 

Fig. 15: Identifying Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) With Torque 
Specifications 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

2. Remove the rocker arm oil control solenoid (VTEC solenoid valve) (B).  

3. Install the parts in the reverse order of removal with a new O-ring (C).  

ROCKER ARM OIL PRESSURE SWITCH (VTEC OIL PRESSURE SWITCH) 
REMOVAL/INSTALLATION 

1. Disconnect the rocker arm oil pressure switch (VTEC oil pressure switch) connector (A), then remove 

the rocker arm oil pressure switch (VTEC oil pressure switch) (B). 

Fig. 16: Identifying Rocker Arm Oil Pressure Switch With Torque Specifications 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

2. Install the parts in the reverse order of removal with a new O-ring (C). 

 

2007 Acura RL 

2005-08 ENGINE PERFORMANCE VTEC - RL

  

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© 2005 Mitchell Repair Information Company, LLC.