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 pressure control circuit's fluid temperature is detected using the Automatic Transmission Fluid (ATF) temperature sensor, which is built onto the valve body. A signal that is based on the fluid temperature is then sent to the TCM.

A01635HE04

The TCM applies a voltage to the temperature sensor through TCM terminal THO1 (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 Code

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 circuit is shorted

  3. 0.5 seconds

  4. 1 trip detection logic

  • Short in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • TCM
P0713

  1. 15 minutes after engine is started, P0712 is not output

  2. ATF temperature sensor circuit is open

  3. 0.5 seconds

  4. 1 trip detection logic

  • Open in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • TCM

MONITOR DESCRIPTION

The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the resistance, the TCM determines the ATF temperature and 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 will illuminate the MIL and store the 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 tester display.

WIRING DIAGRAM

A0162A8E05

INSPECTION PROCEDURE

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 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. According to the display on the intelligent tester, 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)

    • While engine is cold:

      Equal to ambient temperature

    		 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 shows 150°C (302°F) or more, there is a short circuit.

    • When DTC P0713 is output and the intelligent tester shows -40°C (-40°F), there is an open circuit. Check the temperature displayed on the intelligent tester in order to check if a malfunction exists.

    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. A015ZRFE15

      Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E59-12 (THO1) - E59-13 (E2) Always 79 Ω to 156 kΩ
      E59-13 (E2) - Body ground Always 10 kΩ or higher
      E59-12 (THO1) - Body ground Always 10 kΩ or higher

      Tech Tips

      If the resistance is out of the specified range with the ATF temperature shown in the table below, the driveability of the vehicle may decrease.

      Tester Connection ATF Temperature Specified Condition
      E59-12 (THO1) - E59-13 (E2) 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

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

    OK

  2. REPLACE TCM


    1. Replace the TCM Click here.


    NEXT

    PERFORM A/T CODE REGISTRATION Click here

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


    1. A016249E27

      Disconnect the transmission wire connector.

    2. Disconnect the TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E47-8 (OIL) - E59-12 (THO1) Always Below 1 Ω
      E47-9 (E2) - E59-13 (E2) Always Below 1 Ω
      E47-8 (OIL) or E59-12 (THO1) - Body ground Always 10 kΩ or higher
      E47-9 (E2) or E59-13 (E2) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPAIR OR REPLACE TRANSMISSION WIRE Click here