AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P071000

DTC Code DTC Name
P071000 Transmission Fluid Temperature Sensor "A" Circuit Range/Performance

DESCRIPTION

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

The ECM applies a 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
P071000 Transmission Fluid Temperature Sensor "A" Circuit Range/Performance

Either of the following condition is met (2-trip detection logic):


  • Certain monitor enabling conditions are met and the ATF temperature is below 20°C (68°F).

  • Certain monitor enabling conditions are met and the ATF temperature is 110°C (230°F) or higher.

  • Transmission wire (ATF temperature sensor)

  • ATF temperature sensor circuit

  • ECM

 Comes on DTC stored

SAE Code:

P0711
DTC Detection Condition Patterns:
Vehicle Condition
Pattern 1 Pattern 2
Diagnostic Condition Certain monitor enabling conditions are met. ○ ○
Malfunction Condition The ATF temperature is below 20°C (68°F). ○ -
The ATF temperature is 110°C (230°F) or higher. - ○
Duration 3 seconds or more 3 seconds or more
Detection Logic 2-trip detection logic 2-trip detection logic

Tech Tips

This DTC is stored when either of the above detection patterns is met.

MONITOR DESCRIPTION

This DTC indicates that there is a problem with the output signals from the ATF temperature sensor and that the sensor itself is defective. The ATF temperature sensor converts the ATF temperature into an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature and detects an open or short in the ATF temperature circuit or a malfunction of the ATF temperature sensor.

After driving the vehicle for a certain period of time, the ATF temperature should increase. If the ATF temperature is below 20°C (68°F) after driving the vehicle for a certain period, the ECM interprets this as a malfunction, illuminates the MIL and stores this DTC.

If the ATF temperature is 110°C (230°F) or higher and the engine coolant temperature takes 10 seconds or more to reach 60°C (140°F) after a cold start, the ECM also interprets this as a malfunction, illuminates the MIL and stores this DTC.

CONFIRMATION DRIVING PATTERN

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Tech Tips

After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.


  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. w/ Canister Pump Module:

    Turn the ignition switch off and wait for at least 5 hours.

  5. Turn the ignition switch to ON and turn the GTS on.

  6. Start the engine and perform both of the following:


    • Drive the vehicle 20 km (12 mile) or more over a period of 12 minutes and 50 seconds or more.

    • Wait until 40 minutes or more have elapsed since the engine started.

  7. Stop the vehicle.

  8. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.

  9. Input the DTC: P071000.

  10. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

B0070REE38
*a OIL
*b ATF Temperature Sensor
*c Transmission Wire

CAUTION / NOTICE / HINT

Note


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

    Click here

  • If DTCs P071000, P261029 and/or P261093 are output simultaneously, using the GTS, check if the ATF temperature is as specified under the "Normal Condition" column of the Data List. If the ATF temperature is as specified under the "Normal Condition" column, perform troubleshooting for DTC P261029.

    w/ Canister Pump Module:

    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

      • If a circuit related to the ATF temperature sensor becomes open, P071015 will be stored in approximately 0.5 seconds. If DTC P071015 is stored, DTC P071000 cannot be detected. It is not necessary to inspect the circuit when P071000 is output.

PROCEDURE


  1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P071000)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Transmission / Trouble Codes.


      Powertrain > Transmission > Trouble Codes

    5. Read the DTCs using the GTS.

      Result
      Result Proceed to
      Only DTC P071000 is output A
      DTC P071000 and P071015 are output B
      DTC P071000 and other DTCs are output C

      Tech Tips

      If any DTCs other than DTC P071000 are output, perform troubleshooting for those DTCs first.


    B

    GO TO DTC CHART (DTC P071015) Click here

    C

    GO TO DTC CHART Click here

    A

  2. INSPECT AUTOMATIC TRANSAXLE FLUID LEVEL


    1. Check the automatic transaxle fluid level.

      Click here

      OK
      Automatic transaxle fluid level is correct.
      Result
      Proceed to
      OK
      NG

    NG

    ADJUST AUTOMATIC TRANSAXLE FLUID LEVEL Click here

    OK

  3. CHECK TRANSMISSION WIRE CIRCUIT


    1. Disconnect the C59 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C59-46 (THO1) - C59-45 (ETHO) ATF temperature 10°C (50°F) 5 to 8 kΩ
      C59-46 (THO1) - C59-45 (ETHO) ATF temperature 110°C (230°F) 0.22 to 0.28 kΩ
      C59-45 (ETHO) - Body ground Always 10 kΩ or higher
      C59-46 (THO1) - Body ground Always 10 kΩ or higher

      Tech Tips

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

      ATF Temperature Specified Condition
      25°C (77°F) 2.5 to 4.5 kΩ
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

  4. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM REGISTRATION Click here

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


    1. Disconnect the C93 transmission wire connector.

    2. Disconnect the C59 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C93-1 (OIL) - C59-46 (THO1) Always Below 1 Ω
      C93-2 (E2) - C59-45 (ETHO) Always Below 1 Ω
      C93-1 (OIL) or C59-46 (THO1) - Body ground Always 10 kΩ or higher
      C93-2 (E2) or C59-45 (ETHO) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR) Click here

    NG

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