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

Refer to DTC P0711.

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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0712 Transmission Fluid Temperature Sensor "A" Circuit Low Input ATF temperature sensor resistance is below 79 Ω for 0.5 sec. or more (1-trip detection logic).

  • Short in ATF temperature sensor circuit

  • ATF temperature sensor (transmission wire)

  • Wiring harness connector

  • ECM

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

ATF temperature sensor resistance is higher than 156 kΩ for 0.5 sec. or more and either condition is met (1-trip detection logic):

(A) 426 sec. or more have elapsed after the engine start when the engine coolant temperature or intake air temperature is -29.375°C (-20.875°F) or less.*1

(A) 15 minutes or more have elapsed after the engine start when the engine coolant temperature or intake air temperature is -29.375°C (-20.875°F) or less.*2

(B) 10 sec. or more have elapsed after the engine start when the engine coolant temperature and intake air temperature are higher than -29.375°C (- 20.875°F).

  • Open in ATF temperature sensor circuit

  • ATF temperature sensor (transmission wire)

  • Wiring harness connector

  • ECM

 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 ECM determines the ATF temperature, and the ECM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is below 79 Ω*1 or higher than 156 kΩ*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn on the MIL and store the DTC.

Tech Tips


  • The ATF temperature can be checked on the GTS display.

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

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

WIRING DIAGRAM

A01QTB6E05
*1 OIL
*2 ATF Temperature Sensor
*3 Transmission Wire
*4 Wiring Harness Connector

CAUTION / NOTICE / HINT

Note

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

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  1. DATA LIST

    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.

    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 ignition switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the GTS on.

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

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


      Powertrain > Engine and 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.: 215°C (419°F)

      • After stall test: Approx. 80°C (176°F)

      • 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 > Engine and ECT > Data List
      Tester Display
      A/T Oil Temperature 1

      Tech Tips

      When DTC P0712 is output and the GTS indicates 150°C (302°F) or higher, there is a short circuit.

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

      Check the temperature displayed on the GTS in order to check if a malfunction exists.

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

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

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ATF TEMPERATURE SENSOR CIRCUIT)


    1. A01QP1NC19
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B77-120 (THO1) - B77-119 (ETHO) Always 79 Ω to 156 kΩ
      B77-120 (THO1) - Body ground and other terminals Always 10 kΩ or higher
      B77-119 (ETHO) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (WIRING HARNESS CONNECTOR - ECM)


    1. Disconnect the B78 wiring harness connector.

    2. Disconnect the B77 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B78-13 (OIL) - B77-120 (THO1) Always Below 1 Ω
      B78-12 (E2) - B77-119 (ETHO) Always Below 1 Ω
      B78-13 (OIL) or B77-120 (THO1) - Body ground and other terminals Always 10 kΩ or higher
      B78-12 (E2) or B77-119 (ETHO) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT ATF TEMPERATURE SENSOR


    1. A01QRY1C01
      *a

      Component without harness connected

      (Transmission Wire)

      Remove the wiring harness connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-18 (THO1) - A-17 (E2) Always 79 Ω to 156 kΩ
      A-18 (THO1) - Body ground and other terminals Always 10 kΩ or higher
      A-17 (E2) - 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 driveability 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 WIRING HARNESS CONNECTOR Click here

    NG

    REPLACE ATF TEMPERATURE SENSOR (TRANSMISSION WIRE) Click here