DTC Troubleshooting: P2653
DTC P2653: Rocker Arm Oil Control Solenoid Circuit Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P2653 Rocker Arm Oil Control Solenoid Circuit Low Voltage
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the vehicle to the OFF (LOCK) mode.

?4.
Start the engine.

?5.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P2653 Rocker Arm Oil Control Solenoid Circuit Low Voltage
    

Is DTC P2653 indicated?

     
YES
     
     
     
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 control solenoid 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 internal resistance check:

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


Is there 14.6 - 16.2 ? at room temperature?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
3.
Shorted wire check (VTSEX line):

Shorted wire check (VTSEX line)
?1.
Jump the SCS line with the HDS, and wait more than 1 minute.


?2.
Disconnect the following connector.
PCM connector No. 1 (96P)

?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 No. 1 (96P): disconnected
Test point 1
PCM connector No. 1 (96P) No. 25
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short in the VTSEX wire between PCM connector No. 1 terminal No. 25 and the rocker arm oil control solenoid.?
     
NO
     
     
     
The VTSEX 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 P2653 goes away and the PCM was substituted, replace the original PCM.?