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 - E2 4.5 to 5.5 V 5.0 to 8.0 kΩ Approximately 10°C (50° F)
0.22 to 0.28 kΩ Approximately 110°C (230° F)
DTC No. INF No. 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)

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

  • Wire harness or connector

  • Transmission wire (transmission fluid temperature sensor)

  • Hybrid vehicle control ECU

WIRING DIAGRAM

A01GXFME02

INSPECTION PROCEDURE

Tech Tips

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

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Select the following menu items: Select: 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

    NG

    CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) Click here

    OK

  2. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  3. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)


    1. A01GW3PE01

      Check the connections of the hybrid vehicle control ECU connectors.

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

    NG

    CONNECT SECURELY

    OK

  4. CHECK TRANSMISSION WIRE (TRANSMISSION FLUID TEMPERATURE SENSOR)


    1. Turn the power switch off.

    2. A01GYIVE04

      Disconnect connectors E58 and A76 from the hybrid vehicle control ECU.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      E58-33 (THO) - A76-5 (E2) 10°C (50° F) 5.0 to 8.0 kΩ
      E58-33 (THO) - A76-5 (E2) 110°C (230° F) 0.22 to 0.28 kΩ

    4. Turn the power switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      E58-33 (THO) - Body ground Power switch on (IG) Below 1 V

      Note

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

    6. Turn the power switch off.

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

      Standard resistance
      Tester Connection Switch Condition Specified Condition
      E58-33 (THO) - Body ground and other terminals Power switch off 10 kΩ or higher
      A76-5 (E2) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR) Click here

    OK

  5. CHECK FOR INTERMITTENT PROBLEMS


    1. Check for intermittent problems Click here.


    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

    REPLACE HYBRID VEHICLE CONTROL ECU Click here

  6. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)


    1. A01GXS1E01

      Check the connection of the transmission wire connector.

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

    NG

    CONNECT SECURELY

    OK

  7. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - HYBRID VEHICLE CONTROL ECU)


    1. A01GXMJE02

      Disconnect the transmission wire connector.

    2. Turn the power switch on (IG).

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      E58-33 (THO) - Body ground Power switch on (IG) Below 1 V
      A76-5 (E2) - Body ground Power switch on (IG) Below 1 V

      Note

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

    4. Turn the power switch off.

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

      Standard resistance (Check for open)
      Tester Connection Switch Condition Specified Condition
      E58-33 (THO) - E64-9 (THO) Power switch off Below 1 Ω
      A76-5 (E2) - E64-3 (E) Power switch off Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Switch Condition Specified Condition
      E58-33 (THO) or E64-9 (THO) - Body ground and other terminals Power switch off 10 kΩ or higher
      A76-5 (E2) or E64-3 (E) - Body ground and other terminals Power switch off 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TRANSMISSION WIRE Click here