AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P0712, P0713

DTC Code DTC Name
P0712 Transmission Fluid Temperature Sensor "A" Circuit Low Input
P0713 Transmission Fluid Temperature Sensor "A" Circuit High Input

DESCRIPTION

The transmission fluid temperature is detected using the Automatic Transmission Fluid (ATF) temperature sensor, which is built onto the valve body. Depending on the fluid temperature, a signal is input into the TCM.

A01GI0TE01

The TCM applies a voltage to the temperature sensor through TCM terminal OIL.

The sensor resistance changes with the ATF temperature. As the temperature becomes higher, the sensor resistance decreases.

One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage decreases as the temperature becomes higher.

The TCM calculates the ATF temperature based on the voltage signal.

DTC No.

DTC Detection Condition


  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

 Trouble Area
P0712

  1. P0713 is not output

  2. ATF temperature sensor resistance is below 79 Ω

  3. 0.5 seconds

  4. 1 trip detection logic

  • Transmission wire (ATF temperature sensor)

  • Harness and connector

  • TCM
P0713

  1. P0712 is not stored, and either 15 minutes or more have passed after engine is started, or diagnosis condition for DTC P0711 is met

  2. ATF temperature sensor resistance is higher than 156 kΩ

  3. 0.5 seconds

  4. 1 trip detection logic

  • Transmission wire (ATF temperature sensor)

  • Harness and connector

  • TCM

MONITOR DESCRIPTION

The ATF temperature sensor converts ATF temperature to an electrical resistance value. Based on the resistance, the TCM determines the ATF temperature, and the TCM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is less than 79 Ω*1 or more than 156 kΩ*2, the TCM interprets this as a fault in the ATF sensor or wiring. The TCM illuminates the MIL and stores a DTC.

Tech Tips


  • *1: 150°C (302°F) or more is indicated regardless of the actual ATF temperature.

  • *2: -40°C (-40°F) is indicated regardless of the actual ATF temperature.

  • The ATF temperature can be checked on the intelligent tester display.

WIRING DIAGRAM

A01GJMUE02

INSPECTION PROCEDURE

Tech Tips

Using the intelligent tester's Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to save time.

Note

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


  1. Warm up the engine.

  2. Turn the engine switch off.

  3. Connect the intelligent tester to the DLC3.

  4. Turn the engine switch on (IG).

  5. Turn the intelligent tester ON.

  6. Enter the following menus: Powertrain / ECT / Data List.

  7. Follow the instructions on the tester and read the Data List.

TCM:
Tester Display Measurement Item/Range Normal Condition Diagnostic Note
A/T Oil Temperature 1

ATF temperature sensor value/

Min.: -40°C (-40°F)

Max.: 215°C (419°F)

  • After stall speed test: Approximately 80°C (176°F)

  • Equal to ambient temperature while engine is cold

 If value is -40°C (-40°F) or 150°C (302°F), ATF temperature sensor circuit is open or short circuited

Tech Tips


  • When DTC P0712 is output and the intelligent tester output is 150°C (302°F) or more, there is a short circuit.

  • When DTC P0713 is output and the intelligent tester output is -40°C (-40°F), there is an open circuit.

    Measure the resistance between terminal OIL (OT) and the body ground.

Temperature Displayed Malfunction
-40°C (-40°F) Open circuit
150°C (302°F) or more Short circuit

Tech Tips


  • If a circuit related to the ATF temperature sensor becomes open, P0713 is set in approximately 0.5 seconds.

  • It is not necessary to inspect the circuit when P0711 is set.

PROCEDURE


  1. CHECK HARNESS AND TRANSMISSION WIRE (TRANSMISSION WIRE - TCM, TRANSMISSION WIRE (ATF TEMPERATURE SENSOR))


    1. A01GKZME01

      Disconnect the E6 TCM connector.

    2. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Condition Specified Condition
      E6-27 (THO1) - E6-35 (E2) ATF temperature 10°C (50°F) 5.8 to 7.1 kΩ
      E6-27 (THO1) - E6-35 (E2) ATF temperature 25°C (77°F) 2.5 to 4.5 kΩ
      E6-27 (THO1) - E6-35 (E2) ATF temperature 110°C (230°F) 231 to 263 Ω

      Tech Tips

      The resistance value for the 25°C (77°F) ATF temperature condition is a reference value.

    3. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Condition Specified Condition
      E6-27 (THO1) - Body ground Always 10 kΩ or higher
      E6-35 (E2) - Body ground Always 10 kΩ or higher
      E6-27 (THO1) or E6-35 (E2) - Body ground Always 10 kΩ or higher

    NG

    CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) Click here

    OK

  2. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

    PERFORM AT REGISTRATION Click here

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)


    1. A01GJ47E01

      Disconnect the E50 transmission wire connector.

    2. Disconnect the E6 TCM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Tester Connection Condition Specified Condition
      E50-8 (OIL) - E6-27 (THO1) Always Below 1 Ω
      E50-9 (E2) - E6-35 (E2) Always Below 1 Ω
      E50-8 (OIL) or E6-27 (THO1) - Body ground Always 10 kΩ or higher
      E50-9 (E2) or E6-35 (E2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here