DTC P0963: Pressure Control Solenoid "A" Control Circuit High: Notes

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

• Engine speed increases abruptly, and cannot start.
• Engine speed increases abruptly during driving.

Wiring diagram: 

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

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK INPUT SIGNAL FOR TCM  .
   1. After driving with warm up condition, park the vehicle while depressing the brake pedal at "N" range.
   2. Using Subaru Select Monitor, read the data of [Lin. Sol. Set Current] and [Lin. Sol. Actual Current]. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR .

   Do [Lin. Sol. Set Current] and [Lin. Sol. Actual Current] almost match?

   Yes:  Check for poor contact of connector.

   No:  Go to  2.

2. 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 transmission connectors.

      Connector & terminal 

      (B54) No. 32 - (E42) No. 11:

   Is the resistance less than 1 Ω?

   Yes:  Go to  3.

   No:  Repair the open circuit of harness.

3. CHECK HARNESS  .
   1. Turn the ignition switch to ON.
   2. Measure the voltage between TCM connector and chassis ground.

      Connector & terminal 

      (B54) No. 32 (+) - Chassis ground (-):

   Is the voltage approx. 0 V?

   Yes:  Go to  4.

   No:  Repair the short circuit of harness.

4. CHECK LINE PRESSURE SOLENOID  .

   Measure the resistance between transmission connector and transmission body.

   Connector & terminal 

   (T19) No. 11 - Transmission body:

   Is the resistance approximately 3.3 - 7.3 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  5.

5. 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  6.

   No:  Replace the transmission harness. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>TRANSMISSION HARNESS .

6. CHECK HARNESS INSIDE TRANSMISSION  .
   1. Disconnect the control valve body connector.
   2. Turn the ignition switch to ON.
   3. Measure the voltage between transmission connector and transmission body.

      Connector & terminal 

      (T19) No. 11 (+) - Transmission body (-):

   Is the voltage approx. 0 V?

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

   No:  Replace the transmission harness. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>TRANSMISSION HARNESS .