HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A38-257, P0A39-259

DTC Code DTC Name
P0A38-257 Generator Temperature Sensor Circuit Low
P0A39-259 Generator Temperature Sensor Circuit High

DESCRIPTION

Refer to the description for DTC P0A37-260 Click here.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A38 257 Short or short to GND in the generator temperature sensor circuit

  • Wire harness or connector

  • Power management control ECU

  • Hybrid vehicle transaxle assembly (Generator temperature sensor)
P0A39 259 Open or short to +B in the generator temperature sensor circuit

Tech Tips

After confirming that DTC P0A38-257 or P0A39-259 is output, use the GTS to check "Motor Temp No2" in the power management control ECU Data List.

Displayed Temperature Malfunction
-40°C (-40°F) Open circuit or short to +B
215°C (419°F) Short circuit or short to GND

WIRING DIAGRAM

A004FDDE93
*a ADC
*b Hybrid Vehicle Transaxle Assembly (Generator Temperature Sensor)
*c Engine Room Relay Block
*d Power Management Control ECU

CAUTION / NOTICE / HINT

Tech Tips

After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Turn the ignition switch to ON (IG) and wait for 5 seconds or more.

PROCEDURE


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

    Result
    Result Proceed to
    OK A
    NG (The connector is not connected securely.) B
    NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    1. A01V0I0E01
      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.

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  2. CHECK CONNECTOR CONNECTION CONDITION (GENERATOR TEMPERATURE SENSOR CONNECTOR)


    1. A004G3E

      Check the connection condition of the generator temperature sensor connector and the contact pressure of each terminal. Check the terminals for deformation, and check the connector for water ingress and foreign matter.

      OK
      - The connector is connected securely.
      - The terminals are not deformed and are connected securely.
      - No water or foreign matter in the connector.
      Result
      Result Proceed to
      OK A
      NG (The connector is not connected securely.) B
      NG (The terminals are not making secure contact or are deformed, or water or foreign matter exists in the connector.) C

    B

    CONNECT SECURELY

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  3. READ VALUE USING GTS (MOTOR TEMP NO2)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No2.

    4. Read the Data List.

      Result
      Result Proceed to
      -40°C (-40°F) A
      215°C (419°F) B
      Same as actual temperature C

    5. Turn the ignition switch off.


    B

    INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR TEMPERATURE SENSOR) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

  4. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR TEMPERATURE SENSOR)


    1. A004G3E

      Disconnect the C24 generator temperature sensor connector.

    2. A004EDMC11
      *a

      Component without harness connected

      (Generator Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C24-4 (GMT) - C24-8 (GMTG) Ignition switch off 0.3436 to 1442 kΩ

    3. Connect the C24 generator temperature sensor connector.


    NG

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    OK

  5. CHECK POWER MANAGEMENT CONTROL ECU


    1. A004FVNE01
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

      Connect terminals 26 (GMT) and 27 (GMTG) of connector A26 of the power management control ECU.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON (IG).

    4. Enter the following menus: Powertrain / Hybrid Control / Data List / Motor Temp No2.

    5. Read the Data List.

      OK
      GTS Display Condition Specified Condition
      Motor Temp No2

      Terminals GMT and GMTG connected.

      Ignition switch ON (IG)

      		 215°C (419°F)

    6. Turn the ignition switch off.


    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

  6. INSPECT HYBRID VEHICLE TRANSAXLE ASSEMBLY (GENERATOR TEMPERATURE SENSOR)


    1. A004G3E

      Disconnect connector C24 from the generator temperature sensor.

    2. A004EDMC11
      *a

      Component without harness connected

      (Generator Temperature Sensor (Hybrid Vehicle Transaxle Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C24-4 (GMT) - C24-8 (GMTG) Ignition switch off 0.3436 to 1442 kΩ

    3. Connect the C24 generator temperature sensor connector.


    NG

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (GENERATOR TEMPERATURE SENSOR - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the generator temperature sensor connector.

    2. Disconnect the power management control ECU connector.

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

      A004GDNE01
      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      C24-4 (GMT) - A26-26 (GMT) Ignition switch off Below 1 Ω
      C24-8 (GMTG) - A26-27 (GMTG) Ignition switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      C24-4 (GMT) or A26-26 (GMT) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      C24-8 (GMTG) or A26-27 (GMTG) - Body ground and other terminals Ignition switch off 10 kΩ or higher
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Generator Temperature Sensor)
      *b

      Rear view of wire harness connector

      (to Power Management Control ECU)

    4. Connect the power management control ECU connector.

    5. Connect the generator temperature sensor connector.


    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR