HYBRID CONTROL SYSTEM, Diagnostic DTC:P0712-856, P0713-857

DTC Code DTC Name
P0712-856 Transmission Fluid Temperature Sensor "A" Circuit Low Input
P0713-857 Transmission Fluid Temperature Sensor "A" Circuit High Input

DESCRIPTION


Terminal

THO

(with connector disconnected)

 Resistance Transmission Fluid Temperature
THO - E 4.5 to 5.5 V 5.0 to 8.0 kΩ Approximately 50°F (10°C)
0.22 to 0.28 kΩ Approximately 230°F (110°C)
DTC No. INF Code DTC Detection Condition Trouble Area
P0712 856 Malfunction in the transmission fluid temperature sensor circuit (short circuit)

  • Wire harness or connector

  • Transmission wire (transmission fluid temperature sensor)

  • Power management control ECU
P0713 857 Malfunction in the transmission fluid temperature sensor circuit (open circuit)

  • Wire harness or connector

  • Transmission wire (transmission fluid temperature sensor)

  • Power management control ECU

WIRING DIAGRAM

A01FV8WE01

INSPECTION PROCEDURE

Tech Tips

Read the freeze frame data using the GTS. In the freeze frame data, some information is recorded about the engine conditions at the moment a malfunction occurs. This information can be helpful when troubleshooting.

PROCEDURE


  1. READ VALUE USING GTS (T/M OIL TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / T/M Oil Temperature.

    4. Read the Data List.

      OK
      Tester Display Condition Tester Display
      T/M Oil Temperature Vehicle has been left for 24 hours Approximately equal to ambient temperature

    5. Turn the power switch off.


    NG

    Click here

    OK

  2. CHECK FOR INTERMITTENT PROBLEMS

    Click here


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  3. CHECK CONNECTOR CONNECTION CONDITION (POWER MANAGEMENT CONTROL ECU CONNECTOR)


    1. A01FQC6E01
      Text in Illustration
      *A for LHD
      *B for RHD

      Check the connector connections and contact pressure of the relevant terminals for the power management control ECU connectors Click here.

      OK
      The connectors are connected securely and there are no contact pressure problems.

    NG

    CONNECT SECURELY

    OK

  4. CHECK TRANSMISSION WIRE (TRANSMISSION FLUID TEMPERATURE SENSOR)


    1. A01FQ69E20
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the connector from the power management control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A36-33 (THO) - A36-32 (ETHO) 50°F (10°C) 5.0 to 8.0 kΩ
      A36-33 (THO) - A36-32 (ETHO) 230°F (110°C) 0.22 to 0.28 kΩ

    3. Turn the power switch on (IG).

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A36-33 (THO) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the power management control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-33 (THO) - Body ground and other terminals Power switch off 10 kΩ or higher
      A36-32 (ETHO) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Connect the power management control ECU connector.


    NG

    CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR) Click here

    OK

  5. CHECK FOR INTERMITTENT PROBLEMS

    Click here


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  6. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)


    1. A01FQ02

      Check the connection of the transmission wire connector Click here.

      OK
      The connector is connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  7. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - TRANSMISSION WIRE)


    1. A01FRYNE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Power Management Control ECU)
      *b

      Front view of wire harness connector

      (to Transmission Wire)

      Disconnect the power management control ECU connector.

    2. Disconnect the transmission wire connector.

    3. Turn the power switch on (IG).

    4. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A36-33 (THO) - Body ground Power switch on (IG) Below 1 V
      A36-32 (ETHO) - Body ground Power switch on (IG) Below 1 V

      Note

      Turning the power switch on (IG) with the power management control ECU connectors disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

    5. Turn the power switch off.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      A36-33 (THO) - F52-9 (THO) Power switch off Below 1 Ω
      A36-32 (ETHO) - F52-3 (E) Power switch off Below 1 Ω
      A36-33 (THO) or F52-9 (THO) - Body ground and other terminals Power switch off 10 kΩ or higher
      A36-32 (ETHO) or F52-3 (E) - Body ground and other terminals Power switch off 10 kΩ or higher

    7. Connect the power management control ECU connector.

    8. Connect the transmission wire connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TRANSMISSION WIRE Click here