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.

CAUTION:

Use CHECK BOARD when measuring the TCM terminal voltage and resistance.
After servicing or replacing faulty parts, perform the last step of the basic diagnostic procedure. Ref. to TRANSMISSION (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE .

CHECK SECONDARY SOLENOID (WHEN THE ENGINE IS COLD: ATF TEMPERATURE APPROX. 20°C).
1. Using Subaru Select Monitor, read the data of [Secondary Set Current] and [Secondary Actual Current]. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR .
2. Turn the ignition switch to OFF.
3. Disconnect the TCM Connector.
4. Measure the resistance between TCM connector and transmission body.
  Connector & terminal
  
  (T10) No. 32 - Transmission body:
Is the resistance approximately 4.8 - 8.4 Ω?

Yes: Go to 2.

No: Go to 3.
CHECK SECONDARY SOLENOID (WHEN THE ENGINE IS WARMED-UP: ATF TEMPERATURE 80°C OR MORE).
1. Connect the TCM connector.
2. Using Subaru Select Monitor, read the data of [Secondary Set Current] and [Secondary Actual Current]. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA MONITOR .
3. Turn the ignition switch to OFF.
4. Disconnect the TCM connector.
5. Measure the resistance between TCM connector and transmission connectors.
  Connector & terminal
  
  (T10) No. 32 - Transmission body:
  
  NOTE: The resistance value increases as the temperature increases.
  
  Is the resistance 1 MΩ or more?
  
  Yes: Go to 3.
  
  No: 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) .
CHECK HARNESS INSIDE TRANSMISSION.
CAUTION: Start work after ATF cools down.
1. Remove the transmission valve cover.
2. Check for the harness pinch, damage.
  Is the check result OK?
  
  Yes: Go to 4.
  
  No: Repair or replace the harness.
CHECK TRANSMISSION HARNESS (OPEN CIRCUIT).
1. Disconnect the control valve body connector.
2. Measure the resistance between TCM connector and control valve body connector.
  Connector & terminal
  
  (T10) No. 32 - (T11) No. 3:
  
  Is the resistance less than 1 Ω?
  
  Yes: Go to 5.
  
  No: Repair or replace the harness.
CHECK TRANSMISSION HARNESS (SHORT TO POWER SUPPLY).
1. Turn the ignition switch to ON.
2. Measure the voltage between TCM connector and transmission body.
Connector & terminal

(T10) No. 32 (+) - Transmission body (-):

Is the voltage approx. 0V?

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

No: Repair or replace the harness.