DTC P0712

Transmission fluid temperature (TFT) sensor circuit malfunction (short to ground)

DETECTION CONDITION

• If the TCM detects the following condition for 10 s or more, the TCM determines that the TFT sensor circuit has a malfunction.

• ATF temperature 200 °C {392 °F} or more

Diagnostic support note:

• The MIL illuminates if the TCM detects the above malfunction condition during first drive cycle.

• A PENDING CODE is not available.

• FREEZE FRAME DATA is available.

• The AT warning light illuminates.

• The DTC is stored in the TCM memory.

POSSIBLE CAUSE

• TFT sensor malfunction

• Short to ground in wiring harness between TFT sensor and TCM terminal 1J

• Short to ground in wiring harness between TFT sensor and TCM terminal 1M

• Damaged connector between TFT sensor and TCM

• TCM malfunction

STEP

INSPECTION

ACTION

1

• Has the FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA on the repair order, then go to the next step.

2

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

• Inspect for resistance between couple component terminals 1J and 1M (wiring harness-side).

• Is resistance as shown below?

• ATF temperature 10°C {50°F}: approx. 6.445 kilohms

• ATF temperature 25°C {77°F}: approx. 3.5 kilohms

• ATF temperature 110°C {230°F}: approx. 0.247 kilohms

  (See TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR INSPECTION [SJ6A-EL].)

Yes

Go to the next step.

No

Replace the TFT sensor, then go to Step 5.

(See TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR REMOVAL/INSTALLATION [SJ6A-EL].)

4

• Turn the ignition switch to the LOCK position.

• Disconnect the TCM connector.

• Inspect for poor connection at TCM terminals 1J and 1M (such as damaged/pulled-out pins, corrosion).

• Are terminals normal?

Yes

Go to Step 7.

No

Repair or replace the connector and/or terminal, then go to Step 7.

5

INSPECT TFT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND

• Inspect for continuity between couple component terminals (wiring harness-side) and body ground.

• Terminal A and body ground

• Terminal B and body ground

• Is there continuity?

Yes

Repair or replace the wiring harness for short to ground, go to Step 7.

No

Go to the next step.

6

• Turn the ignition switch to the LOCK position.

• Disconnect the couple component connector.

• Inspect for poor connection at couple component terminals A and B (such as damaged/pulled-out pins, corrosion).

• Are terminals normal?

Yes

Replace the TFT sensor, then go to the next step.

(See TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR REMOVAL/INSTALLATION [SJ6A-EL].)

No

Repair or replace the connector and/or terminal, then go to the next step.

7

• Make sure to reconnect all the disconnected connectors.

• Clear the DTC from the memory using the M-MDS.

• Drive the vehicle in D range and make sure that gears shift smoothly from 1GR to 6GR.

• Is same DTC present?

Yes

Replace the TCM, then go to the next step.

(See TCM REMOVAL/INSTALLATION [SJ6A-EL].)

No

Go to the next step.

8

• Perform the “After Repair Procedure”.

  (See AFTER REPAIR PROCEDURE [SJ6A-EL].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SJ6A-EL].)

No

Troubleshooting completed.