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

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.

1. -

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

Excessive shift shock
Shift characteristics malfunction

Wiring diagram:

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

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 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
  
  (B67) No. 6 (+) - (B67) No. 1 (-):
Is the voltage 5 V or more?

Yes : Repair the short circuit of harness.

No : Go to 2.
CHECK HARNESS .
1. Turn the ignition switch to OFF.
2. Disconnect the transmission connector.
3. Measure the resistance of harness between TCM connector and transmission connector.
  Connector & terminal
  
  (B67) No. 6 - (E34) No. 4:
  
  (B67) No. 1 - (E34) No. 16:
Is the resistance less than 1 Ω?

Yes : Go to 3.

No : Repair the open circuit of body harness.
CHECK ATF TEMPERATURE SENSOR .
Measure the resistance between transmission connector terminals.

Connector & terminal

(T1) No. 4 - (T1) No. 16:

Is the resistance 1 MΩ or more?

Yes : Repair the open circuit of transmission harness.

No : Go to 4.
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
  
  (T1) No. 4 - (T1) No. 16:
Is the resistance 730 - 1120 Ω?

Yes : Go to 5.

No : Go to 7.
CHECK ATF TEMPERATURE SENSOR .
Measure the resistance between transmission connector terminals.

Connector & terminal

(T1) No. 4 - (T1) No. 16:

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

Yes : Go to 6.

No : Replace the control valve body. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>CONTROL VALVE BODY
CHECK INPUT SIGNAL FOR TCM .
1. Connect the transmission connector.
2. Turn the ignition switch to ON. (Do not start engine.)
3. Using the Subaru Select Monitor, read data of [ATF Temp.] in the [Data Monitor] of [Transmission]. Ref. to TRANSMISSION (DIAGNOSTICS)>DATA 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 7.
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 (TR690)>TRANSMISSION CONTROL MODULE (TCM)