AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P071011

DTC Code DTC Name
P071011 Transmission Fluid Temperature Sensor "A" Circuit Short To Ground

DESCRIPTION

The ATF temperature sensor converts the automatic transaxle fluid (ATF) temperature into a resistance value for use by the ECM.

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

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 ECM calculates the ATF temperature based on the voltage signal.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P071011 Transmission Fluid Temperature Sensor "A" Circuit Short To Ground

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


  1. The battery voltage is 8 V or more, the ignition switch is ON and the starter is off.

  2. ATF temperature sensor voltage is less than 0.142 V

  3. 0.5 seconds

  4. 1-trip detection logic

  • Short to ground in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • ECM

 Comes on DTC stored

SAE Code:

P0712

MONITOR DESCRIPTION

This DTC indicates a short to ground in the ATF temperature sensor circuit. The ATF temperature sensor converts the ATF temperature into an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and can detect a short to ground in the ATF temperature sensor circuit. If the resistance value of the ATF temperature sensor is below 79 Ω*, the ECM interprets this as a malfunction of the ATF temperature sensor or in the wire harness, illuminates the MIL and stores this DTC.

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

Tech Tips

The ATF temperature can be checked in the Data List.

WIRING DIAGRAM

Refer to DTC P071000.

Click here

CAUTION / NOTICE / HINT

Note

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

Click here

Tech Tips

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


  1. Turn the ignition switch to ON and wait for 3 seconds 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.

    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.


    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 / Transmission / Data List / A/T Oil Temperature No.1.

    7. Read the Data List according to the display on the GTS.


      Powertrain > Transmission > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      A/T Oil Temperature No.1 ATF temperature sensor value

      Min.: -40°C (-40°F)

      Max.: 150°C (302°F)

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

      • Equal to ambient temperature: When engine is cold

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

      Powertrain > Transmission > Data List
      Tester Display
      A/T Oil Temperature No.1

      Tech Tips


      • If DTC P071011 is output and the GTS indicates 150°C (302°F) or higher, there is a short in the circuit.

      • If DTC P071015 is output and the GTS indicates -40°C (-40°F), the circuit is open.

        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

PROCEDURE


  1. READ VALUE USING GTS


    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 / Transmission / Data List / A/T Oil Temperature No.1.

    7. Read the Data List according to the display on the GTS.


      Powertrain > Transmission > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      A/T Oil Temperature No.1 ATF temperature sensor value

      Min.: -40°C (-40°F)

      Max.: 150°C (302°F)

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

      • Equal to ambient temperature: When engine is cold

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

      Powertrain > Transmission > Data List
      Tester Display
      A/T Oil Temperature No.1
      Result
      Result Proceed to
      Data List value is normal A
      Data List value is not normal B

    A

    GO TO STEP 3 Click here

    B

  2. CHECK HARNESS AND CONNECTOR (ATF TEMPERATURE SENSOR - ECM)


    1. Disconnect the C1 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C1-86 (THO1) - C1-133 (ETHW) Always 79 Ω to 156 kΩ
      C1-133 (ETHW) - Body ground Always 10 kΩ or higher
      C1-86 (THO1) - 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.

      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

    NG

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

    OK

  3. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM REGISTRATION Click here

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


    1. Disconnect the C62 transmission wire connector.

    2. Disconnect the C1 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C62-1 (OT+) or C1-86 (THO1) - Body ground Always 10 kΩ or higher
      C62-2 (OT-) or C1-133 (ETHW) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR) When Not Using the Engine Support Bridge: Click here
    REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR) When Using the Engine Support Bridge: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)