AUTOMATIC TRANSAXLE 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 ATF temperature sensor converts the automatic transmission fluid (ATF) temperature into a resistance value for use by the TCM.

A01IHYJE10
*1 Resistance
*2 Acceptable Range
*3 Temperature

The TCM applies a voltage to the temperature sensor through terminal THO1 of the TCM.

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

One terminal of the sensor is grounded so that the sensor resistance and voltage decrease as the temperature rises.

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

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0712 Transmission Fluid Temperature Sensor "A" Circuit Low Input

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. The battery voltage is 8 V or more, the engine switch is on (IG) and the starter is off.

  2. ATF temperature sensor resistance is less than 79 Ω.

  3. 0.5 seconds

  4. 1-trip detection logic

  • Short in ATF temperature sensor circuit

  • Transmission wire

  • ATF temperature sensor (ATF temperature sensor assembly)

  • TCM

 Comes on DTC stored
P0713 Transmission Fluid Temperature Sensor "A" Circuit High Input

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


    DTC Detection Condition 1:

  1. 15 minutes or more have elapsed since the engine was started when the engine coolant temperature or intake air temperature was -29.375°C (-20.875°F) or less.

  2. ATF temperature sensor resistance is higher than 156 kΩ.

  3. 0.5 seconds

  4. 1-trip detection logic


    DTC Detection Condition 2:

  1. 10 seconds or more have elapsed since the engine was started when the engine coolant temperature or intake air temperature was more than -29.375°C (-20.875°F).

  2. ATF temperature sensor resistance is higher than 156 kΩ.

  3. 0.5 seconds

  4. 1-trip detection logic

  • Open in ATF temperature sensor circuit

  • Transmission wire

  • ATF temperature sensor (ATF temperature sensor assembly)

  • TCM

 Comes on DTC stored

MONITOR DESCRIPTION

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

*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.

Tech Tips

The ATF temperature can be checked on the GTS display.

WIRING DIAGRAM

A01IGFAE02
*a ATF Temperature Sensor
*b Transmission Wire
*c ATF Temperature Sensor Assembly
*d Automatic Transaxle Assembly

CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

Click here

Tech Tips


  • Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

  • After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


    1. Start the engine and wait for 15 minutes or more.

    2. Check for DTCs again.

      Click here


  1. DATA LIST

    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 GTS to the DLC3.

    4. Turn the engine switch on (IG).

    5. Turn the GTS on.

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

    7. According to the display on the GTS, read the Data List.


      Powertrain > ECT > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      A/T Oil Temperature 1 ATF temperature sensor value

      Min.: -40°C (-40°F)

      Max.: 150°C (302°F)

      • Approx. 80°C (176°F):

        After stall test

      • Equal to ambient temperature after cold soak

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

      Powertrain > ECT > Data List
      Tester Display
      A/T Oil Temperature 1

      Tech Tips


      • If DTC P0712 is output and the GTS indicates 150°C (302°F) or more, there is a short in the circuit.

        If DTC P0713 is output and the GTS indicates -40°C (-40°F), the circuit is open.

        Measure the resistance between terminal THO1 (OT) and body ground.

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

      • If the circuit related to the ATF temperature sensor becomes open, DTC P0713 is stored immediately (in 0.5 seconds). If DTC P0713 is stored, DTC P0711 cannot be detected.

        It is not necessary to inspect the circuit when DTC P0711 is stored.

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)


    1. A01IIKHC28
      *a

      Component without harness connected

      (Transmission Wire)

      Remove the TCM.

      Click here

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      17 (E2) - 18 (THO1) Always 79 Ω to 156 kΩ
      17 (E2) - Body ground and other terminals Always 10 kΩ or higher
      18 (THO1) - Body ground and other terminals Always 10 kΩ or higher

      Tech Tips

      If the resistance is out of the specified range at any of the ATF temperatures shown in the table below, the drivability of the vehicle may decrease.

      ATF Temperature Specified Condition
      10°C (50°F) 5 to 8 kΩ
      25°C (77°F) 2.5 to 4.5 kΩ
      110°C (230°F) 0.22 to 0.28 kΩ
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TCM Click here

    NG

  2. INSPECT ATF TEMPERATURE SENSOR


    1. B006KOBC06
      *a

      Component without harness connected

      (ATF Temperature Sensor Assembly)

      Disconnect the ATF temperature sensor assembly connector from the transmission wire.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (E2) - 1 (THO1) Always 79 Ω to 156 kΩ
      2 (E2) - Body ground and other terminals Always 10 kΩ or higher
      1 (THO1) - Body ground and other terminals Always 10 kΩ or higher

      Tech Tips

      If the resistance is out of the specified range at any of the ATF temperatures shown in the table below, the drivability of the vehicle may decrease.

      ATF Temperature Specified Condition
      10°C (50°F) 5 to 8 kΩ
      25°C (77°F) 2.5 to 4.5 kΩ
      110°C (230°F) 0.22 to 0.28 kΩ
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TRANSMISSION WIRE Click here

    NG

    REPLACE ATF TEMPERATURE SENSOR ASSEMBLY Click here