DTC P0712: Transmission Fluid Temperature Sensor "A" Circuit Low: Notes

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 .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK HARNESS  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the TCM connector.
   3. Measure the resistance of harness between TCM connector and chassis ground.

   Connector & terminal 

   (T10) No. 1 - Chassis ground:

   (T10) No. 6 - Chassis ground:

   Is the resistance 1 MΩ or more?

   Yes  : Go to  3 .

   No  : Go to  2 .

2. 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  3 .

   No  : Replace the transmission harness.

3. CHECK ATF TEMPERATURE SENSOR  .

   Measure the resistance between TCM connectors.

   Connector & terminal 

   (T10) No. 1 - No. 6:

   NOTE: Perform the measurements using multiple oil temperatures.

   Is resistance as follows?

   Fluid temperature 0°C → Approx. 6.0 kΩ

   Fluid temperature 20°C → Approx. 2.5 kΩ

   Fluid temperature 80°C → Approx. 330 Ω

   Yes  : Replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>TRANSMISSION CONTROL MODULE (TCM) .

   No  : Replace the control valve body. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580)>CONTROL VALVE BODY .