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

The Automatic Transmission Fluid (ATF) temperature sensor converts the fluid temperature into a resistance value for use by the ECM.

A01HQVXE14

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

The sensor resistance changes with the transmission fluid 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 goes down as the temperature becomes higher.

The ECM calculates the fluid temperature based on the voltage signal.

DTC No. DTC Detection Condition Trouble Area
P0712 ATF temperature sensor resistance is less than 79 Ω for 0.5 sec. or more (1-trip detection logic)

  • Short in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • Wiring harness connector

  • ECM
P0713 ATF temperature sensor resistance is more than 156 kΩ for 0.5 seconds or more. Either of the following conditions is met (1 trip detection logic):

  • Open in ATF temperature sensor circuit

  • Transmission wire (ATF temperature sensor)

  • Wiring harness connector

  • ECM
Condition (A): 314 seconds or more have elapsed after the engine start when engine coolant temperature or intake air temperature is -29.375°C (-20.875°F) or less.
Condition (B): 10 seconds or more have elapsed after the engine start when engine coolant temperature and intake air temperature are more than -29.375°C (- 20.875°F).

MONITOR DESCRIPTION

These DTCs indicate an open or short in the automatic transmission fluid (ATF) temperature sensor circuit. The automatic transmission fluid (ATF) temperature sensor converts ATF temperature into an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM 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 ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn on the MIL and store the DTC.

*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.

Tech Tips

The ATF temperature can be checked on the Techstream display.

MONITOR STRATEGY

Related DTCs

P0712: ATF temperature sensor/Range check (Low resistance)

P0713: ATF temperature sensor/Range check (High resistance)
Required sensors/Components ATF temperature sensor (TFT sensor)
Frequency of operation Continuous
Duration 0.5 sec.
MIL operation Immediate
Sequence of operation None

TYPICAL ENABLING CONDITIONS




TYPICAL MALFUNCTION THRESHOLDS

P0712: Range check (Low voltage)

TFT sensor voltage

(ATF temperature)

Less than 0.14 V

Higher than 164°C (327°F)
P0713: Range check (High voltage)

TFT sensor voltage

(ATF temperature)

Higher than 4.91 V

Less than -48°C (-54°F)

COMPONENT OPERATING RANGE

ATF (TFT ) sensor resistance 79 to 156 kΩ

WIRING DIAGRAM

A01HQFFE01

INSPECTION PROCEDURE

Note

Perform the universal trip to clear permanent DTCs Click here.

Tech Tips

Using the Techstream 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 Techstream to the DLC3.

  4. Turn the ignition switch to ON.

  5. Turn the Techstream on.

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

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

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

    When DTC P0713 is output and the Techstream indicates -40°C (-40°F), there is an open circuit.

    Measure the resistance between terminal THO1 (OT) and body ground.

    Temperature Displayed Malfunction
    -40°C (-40°F) Open circuit
    150°C (302°F) or more Short circuit

    Tech Tips

    If the circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 seconds). When P0713 is set, P0711 cannot be detected.

    It is not necessary to inspect the circuit when P0711 is set.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ATF TEMPERATURE SENSOR CIRCUIT)


    1. A01HP4DE05
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E26-120 (THO1) - E26-119 (ETHO) Always 79 Ω to 156 kΩ
      E26-120 (THO1) - Body ground and other terminals Always 10 kΩ or higher
      E26-119 (ETHO) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Result Proceed to
      OK A
      NG B

    B

    CHECK HARNESS AND CONNECTOR (ECM - WIRING HARNESS CONNECTOR) Click here

    A

    REPLACE ECM Click here

  2. CHECK HARNESS AND CONNECTOR (ECM - WIRING HARNESS CONNECTOR)


    1. Disconnect the connector from the wiring harness connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E26-120 (THO1) - E8-13 (OIL) Always Below 1 Ω
      E26-119 (ETHO) - E8-12 (E2) Always Below 1 Ω
      E26-120 (THO1) or E8-13 (OIL) - Body ground and other terminals Always 10 kΩ or higher
      E26-119 (ETHO) or E8-12 (E2) - Body ground and other terminals Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)


    1. A01HQ89E40
      Text in Illustration
      *a

      Component without harness connected

      (Transmission Wire)

      Remove the wiring harness connector from the transaxle.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A-17 (E2) - A-18 (THO1) Always 79 Ω to 156 kΩ
      A-17 (E2) - Body ground and other terminals Always 10 kΩ or higher
      A-18 (THO1) - Body ground and other terminals 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.

      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

    REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR) Click here

    OK

    REPLACE WIRING HARNESS CONNECTOR Click here