DTC P0712:00

TFT sensor: Short to ground

DETECTION CONDITION

• Vehicle condition: TCM communication normal while engine rotates in warm-up condition

• Status: Detects ATF temperature of 200 °C {392 °F} or more

• Period: Confirmed 6 times in 10 s or more

FAIL-SAFE FUNCTION

• Performs control with the ATF temperature of 80 °C {176 °F}.

• Inhibits learning control.

• Inhibits the neutral control.

• Inhibits slip control.

• Inhibits the slope control.

• Inhibits AAS mode.

• Inhibits 5GR and 6GR.

• Inhibits direct mode.

• Inhibits the torque increase request.

POSSIBLE CAUSE

• TFT sensor malfunction

• TCM connector or terminal malfunction

• Short to ground in wiring harness between TFT sensor and TCM terminal 2J

• Short to ground in wiring harness between TFT sensor and TCM terminal 2M

• TCM malfunction

STEP

INSPECTION

ACTION

1

NOTE:

• Recording can be facilitated using the screen capture of the PC function.

• Record the freeze frame data/snap shot data.

—

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 coupler component terminals 2J and 2M (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 6.

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

4

• Switch the ignition off.

• Disconnect the TCM connector.

• Inspect for poor connection at TCM terminals 2J and 2M (such as damaged/pulled-out pins, corrosion).

• Are terminals normal?

Yes

Go to Step 6.

No

Repair or replace the connector and/or terminal, then go to Step 6.

5

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

• Terminal A and body ground

• Terminal B and body ground

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Coupler component terminal A—TCM terminal 2M

• Coupler component terminal B—TCM terminal 2J

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to the next step.

No

Go to the next step.

6

• Always reconnect all disconnected connectors.

• Clear the DTC using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Perform the following procedure to ensure that the DTC has been resolved:

• Start the engine.

• Warm-up the engine and transmission.

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

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Is the 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.

7

• Clear the DTC using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Perform the DTC inspection using the M-MDS.

  (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

DTC troubleshooting completed.