DTC P0976: Shift Solenoid "B" Control Circuit Low: Notes

1. - 

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

Gear is not changed. (No down-shift)

Wiring diagram: 

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

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK HARNESS  .
   CAUTION: Start work after ATF cools down.
   1. Turn the ignition switch to OFF.
   2. Disconnect the TCM connector.
   3. Remove the transmission valve cover.
   4. Disconnect the control valve body connector.
   5. Measure the resistance between TCM connector and chassis ground.

      Connector & terminal 

      (T10) No. 30 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  2 .

   No  : Repair the short circuit of harness.

2. CHECK PRIMARY DOWN SOLENOID  .
   1. Connect the connector for control valve body.
   2. Measure the resistance between TCM connector and transmission body.

      Connector & terminal 

      (T10) No. 30 - Transmission body:

   Is the resistance approximately 10 - 13.5 Ω? (When cold)

   Yes  : Check for poor contact of connector, and if no fault is found, replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>TRANSMISSION CONTROL MODULE (TCM) .

   No  : Go to  3 .

3. CHECK HARNESS INSIDE TRANSMISSION  .

   Check for the harness pinch, damage.

   Is the check result OK?

   Yes  : Replace the control valve body. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>CONTROL VALVE BODY .

   No  : Replace the transmission harness.