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2008 - MX-5 - Transmission/Transaxle

DTC P0713 [SJ6A-EL]



DTC P0713

Transmission fluid temperature (TFT) sensor circuit malfunction (short to power/open circuit)

DETECTION CONDITION

  • If the TCM detects the following condition for 1 s or more, the TCM determines that the TFT sensor circuit has a malfunction.

    • Engine warmed-up

    • ATF temperature less than –43 °C {–45.4 °F}

    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

  • Open circuit in wiring harness between TFT sensor and TCM terminal 1J

  • Open circuit in wiring harness between TFT sensor and TCM terminal 1M

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

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

  • Damaged connector between TFT sensor and TCM

  • TCM malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
  • 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 REPAIR INFORMATION AVAILABILITY
  • 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 RESISTANCE OF TFT SENSOR CIRCUIT
  • Inspect for resistance between couple component terminals 1J and 1M (wiring harness-side).

  • Is resistance as shown below?

Yes

Go to the next step.

No

Go to Step 5.

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 COUPLE COMPONENT CONNECTOR FOR POOR CONNECTION
  • Disconnect the couple component connector.

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

  • Are terminals normal?

Yes

Go to the next step.

No

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

6

INSPECT TFT SENSOR

Yes

Repair or replace the wiring harness for open circuit, go to the next step.

No

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

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

7

VERIFY TROUBLESHOOTING OF DTC P0713 COMPLETED
  • 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

VERIFY AFTER REPAIR PROCEDURE
  • Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SJ6A-EL].)

No

Troubleshooting completed.




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