AUTOMATIC TRANSMISSION SYSTEM, Diagnostic DTC:P071000

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

DESCRIPTION

The ATF temperature sensor converts the fluid 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 becomes higher, the sensor resistance decreases.

One terminal of the sensor is grounded so that the sensor resistance and voltage goes down as the temperature becomes higher.

The ECM calculates the fluid 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 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 fluid level

  • Transmission wire (ATF temperature sensor)

 Comes on DTC stored SAE: P0711
DTC Detection Condition Patterns
Vehicle Condition
Pattern 1 Pattern 2
Diagnostic Condition Certain monitor enabling conditions are met. ○ ○
Malfunction Condition ATF temperature is below 20°C (68°F). ○ -
ATF temperature is 110°C (230°F) or higher. - ○
Duration - -
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 output 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 opens or shorts 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.

When 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 determines this as a malfunction, illuminates the MIL and stores this DTC.

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC 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 engine switch on (IG) 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:


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

    2. Turn the engine switch on (IG) and turn the GTS on.

    3. Start the engine and perform the following procedures:


      1. Drive the vehicle 4.9 km (3.05 mile) or more over a period of 2 minutes and 5 seconds or more.

      2. Wait until 10 minutes or more have elapsed since the engine started.

  5. w/o Canister Pump Module:


    1. Turn the engine switch off and wait for at least 30 seconds.

    2. Turn the engine switch on (IG) and turn the GTS on.

    3. Drive the vehicle 8 km (4.97 mile) or more over a period of 22 minutes or more.

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

  7. Input the DTC: P071000.

  8. 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.

CAUTION / NOTICE / HINT

Note


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

    Click here

  • w/ Canister Pump Module:

    If DTCs P071000 and P2610 are output simultaneously, confirm that the ATF temperature is as specified in "Normal Condition" using the GTS first. When the ATF temperature is as specified in "Normal Condition", perform troubleshooting for DTC P2610.

    Click here


  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.


    1. Warm up the engine.

    2. Turn the engine switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the engine switch on (IG).

    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: While 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


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

      • When DTC P071015 is output and the GTS shows -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

      Tech Tips

      If a circuit related to the ATF temperature sensor becomes open, P071015 will be stored in approximately 0.5 seconds. 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 engine switch on (IG).

    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 other DTCs are output B

      Tech Tips

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


    B

    GO TO DTC CHART Click here

    A

  2. INSPECT TRANSMISSION FLUID LEVEL


    1. Check the transmission fluid level.

      Click here

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

    OK

    REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR) Click here

    NG

    ADJUST AUTOMATIC TRANSMISSION FLUID LEVEL Click here