DTC P0712 Transmission Fluid Temperature Sensor Circuit Low Input: Wiring Diagram

WARNING: This page is about a different variant/trim than selected.

Fig 1: ATF Temperature Sensor Wiring Diagram (DTC P0712)

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance of harness between TCM connector and chassis ground. Connector & terminal (B54) No. 3 - Chassis ground: (B54) No. 16 - Chassis ground:	Is the resistance 1 MΩ or more?	Go to step 2 .	Repair the short circuit of harness.
2 CHECK HARNESS. Measure the resistance between TCM connector and transmission body. Connector & terminal (T4) No. 16 - Transmission body: (T4) No. 19 - Transmission body:	Is the resistance 1 MΩ or more?	Go to step 3 .	Repair the short circuit of harness.
3 CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. Remove the transmission oil pan. Check for the harness pinch, damage.	Is the harness normal?	Go to step 4 .	Replace the transmission harness.
4 CHECK ATF TEMPERATURE SENSOR. Measure the resistance between transmission connector terminals. Connector & terminal (T4) No. 16 - No. 19:	Is resistance as follows? Fluid temperature 0°C → approx. 6.2 kΩ Fluid temperature 20°C → approx. 2.6 kΩ Fluid temperature 80°C → approx. 370 Ω	Check the TCM.	Replace the transmission harness.