Subaru Crosstrek Service Manual: Dtc p0712 transmission fluid temperature sensor "a" circuit low

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

• Excessive shift shock

• Shift characteristics malfunction

Use the check board when measuring the TCM terminal voltage and resistance.

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

(B54) No. 1 — Chassis ground:

(B54) No. 6 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW">Go to Step 4.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW">Go to Step 2.

2.CHECK HARNESS.

1) Disconnect the transmission connector.

2) Measure the resistance between transmission connector and transmission body.

Connector & terminal

(T4) No. 5 — Transmission body:

(T4) No. 9 — Transmission body:

Is the resistance 1 M? or more?

Repair the short circuit of body harness.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW">Go to Step 3.

3.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 there any fault in the harness?

Replace the transmission harness.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR "A" CIRCUIT LOW">Go to Step 4.

4.CHECK ATF TEMPERATURE SENSOR.

Measure the resistance between transmission connector terminals.

Connector & terminal

(T11) No. 1 — No. 6:

Perform the measurements using multiple oil temperatures.

Is resistance as follows?
Fluid temperature 0°C > Approx. 6.0 k?
Fluid temperature 20°C > Approx. 2.5 k?
Fluid temperature 80°C > Approx. 330 ?

Replace the TCM. Transmission Control Module (TCM)">

Replace the control valve body. Control Valve Body">

• Detect the ground short circuit of transmission oil temperature sensor.

• Judge as NG if the voltage detected by the transmission oil temperature sensor is lower than the predetermined value.

Dtc p0711 transmission fluid temperature sensor "a" circuit range/performance

Dtc p0713 transmission fluid temperature sensor "a" circuit high

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