DTC P0712 [SJ6A-EL]

id050208801300

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.
•  The AT warning light illuminates if the TCM detects the above malfunction condition during first drive cycle.
•  PENDING CODE is not available.
•  FREEZE FRAME DATA is available.
•  The DTC is stored in the TCM memory.
POSSIBLE CAUSE
•  TFT sensor malfunction
•  TCM connector or terminal malfunction
•  Short to GND in wiring harness between TFT sensor and TCM terminal 1J
•  Short to GND in wiring harness between TFT sensor and TCM terminal 1M
•  Coupler component connector or terminal malfunction
•  TCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
•  Has the FREEZE FRAME DATA been recorded on the repair order?
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 REPAIR INFORMATION AVAILABILITY
•  Verify related service 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 RESISTANCE OF TFT SENSOR CIRCUIT
•  Inspect for resistance between coupler 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
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
INSPECT TCM CONNECTOR FOR POOR CONNECTION
•  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 GND
•  Inspect for continuity between coupler component terminals (wiring harness-side) and body GND.
―  Terminal A and body GND
―  Terminal B and body GND
•  Is there continuity?
Yes
Repair or replace the wiring harness for short to GND, go to Step 7.
No
Go to the next step.
6
INSPECT COUPLER COMPONENT CONNECTOR FOR POOR CONNECTION
•  Turn the ignition switch to the LOCK position.
•  Disconnect the coupler component connector.
•  Inspect for poor connection at coupler 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
VERIFY TROUBLESHOOTING OF DTC P0712 COMPLETED
•  Make sure to reconnect all the 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 range and make sure that the gears shift smoothly from 1GR to 6GR.
•  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.
8
VERIFY NO DTC HAS BEEN PRESENTED
•  Perform the “Reading DTCs Procedure”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [SJ6A-EL].)
No
DTC troubleshooting completed.