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 to GND in the generator temperature sensor circuit

  • Wire harness or connector

  • Power management control ECU

  • Hybrid vehicle generator 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 intelligent tester 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

A01NEO0E70

INSPECTION PROCEDURE

PROCEDURE


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


    1. Check the connections of the power management control ECU connectors.

      A01NF3IE01
      Text in Illustration
      *1 for LHD *2 for RHD
      OK
      The connectors are connected securely and there are no contact problems.

    NG

    CONNECT SECURELY

    OK

  2. READ VALUE USING INTELLIGENT TESTER (MOTOR TEMP NO2)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch 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 power switch off.


    B

    READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT) Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  3. READ VALUE USING INTELLIGENT TESTER (CHECK FOR OPEN)


    1. A01NHDI

      Disconnect the generator temperature sensor connector.

    2. A01NE27E01

      Connect terminals 4 (GMT) and 9 (GMTG) of vehicle side connector D45 of the generator temperature sensor.

    3. Connect the intelligent tester to the DLC3.

    4. Turn the power switch on (IG).

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

    6. Read the Data List.

      OK
      Tester Display Condition Specified Condition
      Motor Temp No2

      Terminals GMT and GMTG connected.

      Power switch on (IG)

      		 215°C (419°F)
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Generator Temperature Sensor)

      Tech Tips

      The generator temperature sensor is not available separately. If it requires replacement, replace the hybrid vehicle generator assembly.

    7. Turn the power switch off.

    8. Connect the generator temperature sensor connector.


    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - GENERATOR TEMPERATURE SENSOR) Click here

    OK

    REPLACE HYBRID VEHICLE GENERATOR ASSEMBLY Click here

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


    1. A01NERPE13
      Text in Illustration
      *1

      Component with harness connected

      (Power Management Control ECU)

      Connect terminals 26 (GMT) and 27 (GMTG) of connector A80 of the power management control ECU.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (IG).

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

    5. Read the Data List.

      OK
      Tester Display Condition Specified Condition
      Motor Temp No2

      Terminals GMT and GMTG connected.

      Power switch on (IG)

      		 215°C (419°F)
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    6. Turn the power switch off.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. READ VALUE USING INTELLIGENT TESTER (CHECK FOR SHORT)


    1. A01NHDI

      Disconnect the generator temperature sensor connector.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (IG).

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

    5. Read the Data List.

      OK
      Tester Display Condition Specified Condition
      Motor Temp No2 Power switch on (IG) -40°C (-40°F)

      Tech Tips

      The generator temperature sensor is not available separately. If it requires replacement, replace the hybrid vehicle generator assembly.

    6. Turn the power switch off.


    NG

    CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - GENERATOR TEMPERATURE SENSOR) Click here

    OK

    REPLACE HYBRID VEHICLE GENERATOR ASSEMBLY Click here

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


    1. Disconnect the generator temperature sensor connector.

    2. Disconnect connector A80 from the power management control ECU.

    3. A01NEJZE01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Generator Temperature Sensor)
      *2

      Rear view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      D45-4 (GMT) - A80-26 (GMT) Power switch off Below 1 Ω
      D45-9 (GMTG) - A80-27 (GMTG) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      D45-4 (GMT) or A80-26 (GMT) - Body ground and other terminals Power switch off 10 kΩ or higher
      D45-9 (GMTG) or A80-27 (GMTG) - Body ground and other terminals Power switch off 10 kΩ or higher
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    4. Connect the power management control ECU connector.

    5. Connect the generator temperature sensor connector.


    B

    REPLACE POWER MANAGEMENT CONTROL ECU (for RHD) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POWER MANAGEMENT CONTROL ECU (for LHD) Click here