DTC P2720: Pressure Control Solenoid "D" Control Circuit Low: Notes

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

• Fuel economy deterioration (excessive supply of fluid pressure)
• Shift control malfunction

Wiring diagram: 

CVT control system Ref. to WIRING SYSTEM>CVT CONTROL SYSTEM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK HARNESS  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the TCM connector.
   3. Disconnect the transmission connector.
   4. Measure the resistance between TCM connector and chassis ground.

      Connector & terminal 

      (B54) No. 31 - Chassis ground:

      Is the resistance 1 MΩ or more?

      Yes  : Go to  2.

      No  : Repair the short circuit of harness.

2. CHECK OIL PUMP ON/OFF SOLENOID  .

   Measure the resistance between transmission connector and transmission body.

   Connector & terminal 

   (T19) No. 5 - Transmission body:

   Is the resistance approximately 12.5 - 19.5 Ω? (When cold)

   Yes  : Check for poor contact of connector, and if no fault is found, replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>TRANSMISSION CONTROL MODULE (TCM) .

   No  : Go to  3.

3. CHECK HARNESS INSIDE TRANSMISSION  .
   CAUTION: Start work after ATF cools down.
   1. Remove the transmission oil pan.
   2. Check for the harness pinch, damage.

      Is the check result OK?

      Yes  : Go to  4.

      No  : Replace the transmission harness.

4. CHECK HARNESS INSIDE TRANSMISSION  .
   1. Disconnect the control valve body connector.
   2. Measure the resistance between transmission connector and transmission body.

      Connector & terminal 

      (T19) No. 5 - Transmission body:

      Is the resistance 1 MΩ or more?

      Yes  : Replace the control valve body. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>CONTROL VALVE BODY .

      No  : Replace the transmission harness.