DTC P2764: Torque Converter Clutch Pressure Control Solenoid Control Circuit Low: Notes

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

No lock-up occurs.

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. 15 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  2.

   No  : Repair the short circuit of harness.

2. CHECK LOCK-UP DUTY SOLENOID  .

   Measure the resistance between transmission connector and transmission body.

   Connector & terminal 

   (T19) No. 8 - Transmission body:

   Is the resistance approximately 10 - 14.2 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. 8 - 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.