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 Click here.

DTC Code DTC Detection Condition Trouble Area
P0712 The ATF temperature sensor resistance is below 79 Ω for 0.5 seconds or more (1-trip detection logic).

  • Short in ATF temperature sensor circuit

  • ATF temperature sensor (transmission wire)

  • ECM
P0713 15 minutes or more after the engine is started or the ATF temperature reaches 10°C or higher, the ATF temperature sensor resistance is higher than 156 kΩ for 0.5 seconds or more (1-trip detection logic).

  • Open in ATF temperature sensor circuit

  • ATF temperature sensor (transmission wire)

  • ECM

MONITOR DESCRIPTION

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

Tech Tips


  • *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.

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

WIRING DIAGRAM

A005698E14
*a ATF Temperature Sensor
*b Transmission Wire

CAUTION / NOTICE / HINT


  1. DATA LIST

    Tech Tips

    Using the intelligent tester 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 intelligent tester to the DLC3.

    4. Turn the ignition switch to ON.

    5. Turn the intelligent tester on.

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

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

      Engine and ECT
      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:

        Approximately 80°C (176°F)

      • When engine cold:

        Equal to ambient temperature

      		 If the value is -40°C (-40°F) or 150°C (302°F) or higher, the 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 higher, 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.

        Check the temperature displayed on the tester 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

      Tech Tips


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

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

PROCEDURE


  1. INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)


    1. A0055R6E14
      Text in Illustration
      *1

      Component without harness connected

      (Transmission Wire)

      Disconnect the B19 transmission wire connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (THO) - 6 (E2) Always 79 Ω to 156 kΩ
      1 (THO) - Body ground Always 10 kΩ or higher
      6 (E2) - Body ground 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.

      Resistance (Reference)
      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

    NG

    REPAIR OR REPLACE ATF TEMPERATURE SENSOR (TRANSMISSION WIRE) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)


    1. A00599HE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to ECM)

      Disconnect the B39 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B39-70 (THO1) - B39-71 (ETHO) Always 79 Ω to 156 kΩ
      B39-70 (THO1) - Body ground Always 10 kΩ or higher
      B39-71 (ETHO) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR