DTC P0713 Transmission Fluid Temperature Sensor "A" Circuit High: Notes

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

• Excessive shift shock
• Shift characteristics malfunction

Wiring diagram: 

• Non-turbo model

  CVT control system Ref. to WIRING SYSTEM>CVT Control System>WIRING DIAGRAM>NON-TURBO MODEL .

  Fig 1: Transmission Fluid Temperature Sensor (A) Circuit High System Wiring Diagram (Non-Turbo Model)

  Courtesy of SUBARU OF AMERICA, INC.
• Turbo model

  CVT control system Ref. to WIRING SYSTEM>CVT Control System>WIRING DIAGRAM>TURBO MODEL .

1. CHECK HARNESS. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the TCM connector.
   3. Turn the ignition switch to ON.
   4. Measure the voltage between TCM connectors.

      Connector & terminal 

      (B54) No. 6 (+) - (B54) No. 1 (-):

   Is the voltage 5 V or more?

   • Yes  : Repair the short circuit of harness.
   • No  : Go to 2. 
2. CHECK HARNESS. 
   1. Turn the ignition switch to OFF.
   2. Disconnect the transmission connector.
   3. Measure the resistance between TCM connector and transmission connectors.

      Connector & terminal 

      Non-turbo model 

      (B54) No. 6 - (B11) No. 5:

      (B54) No. 1 - (B11) No. 9:

      Turbo model 

      (B54) No. 6 - (B11) No. 16:

      (B54) No. 1 - (B11) No. 19:

   Is the resistance less than 1 Ω?

   • Yes  : Go to 3. 
   • No  : Repair the open circuit of body harness.
3. CHECK ATF TEMPERATURE SENSOR. 

   Measure the resistance between transmission connector terminals.

   Connector & terminal 

   Non-turbo model 

   (T4) No. 5 - No. 9:

   Turbo model 

   (T4) No. 16 - No. 19:

   Is the resistance 1 MΩ or more?

   • Yes  :
     • Non-turbo model

       Go to 4. 

     • Turbo model

       Repair the open circuit of transmission harness.

   • No  : Go to  5.
4. CHECK HARNESS. 
   CAUTION: Start work after ATF cools down.
   1. Remove the transmission valve cover.
   2. Measure the resistance between transmission connector and control valve body connector.

      Connector & terminal 

      (T4) No. 5 - (T11) No. 1:

      (T4) No. 9 - (T11) No. 6:

   Is the resistance less than 1 Ω?

   • Yes  : Repair the open circuit of transmission harness on the control valve side.
   • No  : Repair the open circuit of transmission harness on the outside of the transmission.
5. CHECK ATF TEMPERATURE SENSOR. 
   1. Connect all connectors.
   2. Start the engine.
   3. Warm up until the ATF temperature exceeds 50°C (122°F).
   4. Turn the ignition switch to OFF.
   5. Disconnect the transmission connector.
   6. Measure the resistance between transmission connector terminals.

      Connector & terminal 

      Non-turbo model 

      (T4) No. 5 - No. 9:

      Turbo model 

      (T4) No. 16 - No. 19:

   Is resistance as follows?

   • Non-turbo model

     650 - 990 Ω

   • Turbo model

     730 - 1120 Ω

   • Yes  : Go to 6. 
   • No  : Go to  8.
6. CHECK ATF TEMPERATURE SENSOR. 

   Measure the resistance between transmission connector terminals.

   Connector & terminal 

   Non-turbo model 

   (T4) No. 5 - No. 9:

   Turbo model 

   (T4) No. 16 - No. 19:

   Does the resistance value increase gradually while the ATF temperature decreases?

   • Yes  : Go to 7. 
   • No  : Replace the control valve body. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>Transmission Control Module (TCM) . Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>Transmission Control Module (TCM) .
7. CHECK INPUT SIGNAL FOR TCM. 
   1. Connect the transmission connector.
   2. Turn the ignition switch to ON. (Do not start engine.)
   3. Read the data of [ATF Temp.] using Subaru Select Monitor.

   Does the ATF temperature gradually decrease?

   • Yes  : Check for poor contact of the ATF temperature sensor and transmission connector harness, and repair the defective part.
   • No  : Go to 8. 
8. CHECK FOR POOR CONTACT. 

   Is there poor contact of ATF temperature sensor circuit?

   • Yes  : Repair the poor contact.
   • No  : Replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR580)>Transmission Control Module (TCM) . Ref. to CONTINUOUSLY VARIABLE TRANSMISSION(TR690)>Transmission Control Module (TCM) .