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 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 Techstream 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

A011WR1E30

INSPECTION PROCEDURE

PROCEDURE

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

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

      A011X3A
      OK
      The connectors are connected securely and there are no contact pressure problems.
    NG

    CONNECT SECURELY

    OK

  2. READ VALUE USING TECHSTREAM (MOTOR TEMP NO2)

    1. Connect the Techstream 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 TECHSTREAM (CHECK FOR SHORT) Click here

    C

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  3. READ VALUE USING TECHSTREAM (CHECK FOR OPEN)

    1. Disconnect the generator temperature sensor connector.

      A011XKS

    2. Connect terminals 4 (GMT) and 8 (GMTG) of vehicle side connector E13 of the generator temperature sensor.

      A011WN7E01

    3. Connect the Techstream 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
      *a

      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 transaxle 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 TRANSAXLE ASSEMBLY Click here

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

    1. Connect terminals 26 (GMT) and 27 (GMTG) of connector A38 of the power management control ECU.

      A011VI2E26

    2. Connect the Techstream 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)
      Text in Illustration
      *a

      Component with harness connected

      (Power Management Control ECU)

    6. Turn the power switch off.

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. READ VALUE USING TECHSTREAM (CHECK FOR SHORT)

    1. Disconnect the generator temperature sensor connector.

      A011XKS

    2. Connect the Techstream 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 transaxle assembly.

    6. Turn the power switch off.

    7. Connect the generator temperature sensor connector.

    NG

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

    OK

    REPLACE HYBRID VEHICLE TRANSAXLE ASSEMBLY Click here

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

    1. Disconnect the generator temperature sensor connector.

    2. Disconnect connector A38 from the power management control ECU.

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

      A011Y2EE01
      Standard Resistance (Check for Open)
      Tester Connection Switch Condition Specified Condition
      E13-4 (GMT) - A38-26 (GMT) Power switch off Below 1 Ω
      E13-8 (GMTG) - A38-27 (GMTG) Power switch off Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Switch Condition Specified Condition
      E13-4 (GMT) or A38-26 (GMT) - Body ground and other terminals Power switch off 10 kΩ or higher
      E13-8 (GMTG) or A38-27 (GMTG) - Body ground and other terminals Power 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.

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POWER MANAGEMENT CONTROL ECU Click here