DTC P0712:00 [TCM (SJ6A-EL)]

id0502o1817400

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 the i-stop 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

Diagnostic procedure

STEP

INSPECTION

ACTION
1
RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
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 INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT RESISTANCE OF TFT SENSOR CIRCUIT
•  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
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
INSPECT TCM CONNECTOR FOR POOR CONNECTION
•  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 TFT SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND
•  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
VERIFY SAME DTC IS NOT PRESENT
•  Always reconnect all disconnected connectors.
•  Clear the DTC using the M-MDS.
•  Perform the following procedure to ensure that the DTC has been resolved:
1.  Start the engine.
2.  Warm-up the engine and transmission.
3.  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.
•  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
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Clear the DTC using the M-MDS.
•  Perform the DTC inspection using the M-MDS.
•  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.