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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 108 (Hybrid Control System (2WD) - Diagnostic Codes (3 Of 7)) >> HYBRID CONTROL SYSTEM (for 2WD) >> DTC P0A9B-2A: Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range; DTC P0AC5-2A: Hybrid/EV Battery Temperature Sensor "B" Signal Stuck In Range; DTC P0ACA-2A: Hybrid/EV Battery Temperature Sensor "C" Signal Stuck In Range; DTC P0AE8-2A: Hybrid/EV Battery Temperature Sensor "D" Signal Stuck In Range; DTC P0BC2-2A: Hybrid/EV Battery Temperature Sensor "E" Signal Stuck In Range; DTC P0C33-2A: Hybrid/EV Battery Temperature Sensor "F" Signal Stuck In Range; DTC P3065-62: Hybrid/EV Battery Temperature Sensor "Group 1" Signal Compare Failure; DTC P306A-62: Hybrid/EV Battery Temperature Sensor "Group 2" Signal Compare Failure [12/2019 - 11/2023] >> Procedure

DTC P0A9B-2A: Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range; DTC P0AC5-2A: Hybrid/EV Battery Temperature Sensor "B" Signal Stuck In Range; DTC P0ACA-2A: Hybrid/EV Battery Temperature Sensor "C" Signal Stuck In Range; DTC P0AE8-2A: Hybrid/EV Battery Temperature Sensor "D" Signal Stuck In Range; DTC P0BC2-2A: Hybrid/EV Battery Temperature Sensor "E" Signal Stuck In Range; DTC P0C33-2A: Hybrid/EV Battery Temperature Sensor "F" Signal Stuck In Range; DTC P3065-62: Hybrid/EV Battery Temperature Sensor "Group 1" Signal Compare Failure; DTC P306A-62: Hybrid/EV Battery Temperature Sensor "Group 2" Signal Compare Failure [12/2019 - 11/2023]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC OUTPUT (HYBRID CONTROL) 
    1. Check for DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      P0AFC-00 or P0AFC-96 is not output. A
      P0AFC-00 or P0AFC-96 is also output. B
    2. Turn the ignition switch off.

    Result: 

    B 

    GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 11/2023] 

    Result: 

    A 

    See step  2

  2. CHECK INSTALLATION OF TEMPERATURE SENSOR (HYBRID BATTERY TEMPERATURE SENSOR) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Remove the upper HV battery cover sub-assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    3. Visually check the installation condition of the relevant battery temperature sensor.
      GTY881197Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 Battery Temperature Sensor 0 *2 Battery Temperature Sensor 1
      *3 Battery Temperature Sensor 2 *4 Battery Temperature Sensor 3
      *5 Battery Temperature Sensor 4 *6 Battery Temperature Sensor 5

      Standard Condition

      Each battery temperature sensor is installed in the correct location with the correct orientation and its claws are engaged securely.

      Result

      Result Proceed to
      Each battery temperature sensor is installed in the correct location with the correct orientation and its claws are engaged securely. A
      Claws are damaged. B
      Any of battery temperature sensors are not installed correctly, but claws are not damaged. C
    4. Install the upper HV battery cover sub-assembly.

    Result: 

    B 

    REPLACE HYBRID BATTERY THERMISTOR. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

    Result: 

    C 

    INSTALL PARTS CORRECTLY 

    Result: 

    A 

    See step  3

  3. CHECK HYBRID BATTERY THERMISTOR (BATTERY TEMPERATURE SENSOR) 
    WARNING:

    Be sure to wear insulated gloves.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Remove the HV battery junction block assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    3. Disconnect the z12 battery voltage sensor connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    4. Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 0 to 5).
      GTY885818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Battery Voltage Sensor)

      Tester Connection

      Tester Connection Battery Temperature Sensor
      z12-7 (TB0) - z12-19 (GB0) 0
      z12-6 (TB1) - z12-18 (GB1) 1
      z12-5 (TB2) - z12-17 (GB2) 2
      z12-4 (TB3) - z12-16 (GB3) 3
      z12-3 (TB4) - z12-15 (GB4) 4
      z12-2 (TB5) - z12-14 (GB5) 5

      Standard Resistance

      Thermistor Temperature Condition Specified Condition
      0 to 10°C (32 to 50°F) Ignition switch off 17.7 to 27.8 kΩ
      10 to 20°C (50 to 68°F) Ignition switch off 12.0 to 18.2 kΩ
      20 to 30°C (68 to 86°F) Ignition switch off 8.22 to 12.2 kΩ
      30 to 40°C (86 to 104°F) Ignition switch off 5.74 to 8.41 kΩ
      40 to 50°C (104 to 122°F) Ignition switch off 4.09 to 5.91 kΩ
      NOTE:

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    5. Disconnect the y1 battery voltage sensor connector.
      NOTE:

      Before disconnecting the connector, check that it is not loose or disconnected.

    6. Measure the resistance according to the value(s) in the table below.
      GTY908969Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to Battery Voltage Sensor)

      Standard Resistance

      Tester Connection Condition Specified Condition
      z12-7 (TB0) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-7 (TB0) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-19 (GB0) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-19 (GB0) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-6 (TB1) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-6 (TB1) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-18 (GB1) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-18 (GB1) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-5 (TB2) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-5 (TB2) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-17 (GB2) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-17 (GB2) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-4 (TB3) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-4 (TB3) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-16 (GB3) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-16 (GB3) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-3 (TB4) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-3 (TB4) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-15 (GB4) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-15 (GB4) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-2 (TB5) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-2 (TB5) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-14 (GB5) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-14 (GB5) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-1 (TC0) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-1 (TC0) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      z12-13 (GC0) - y1-1 (IGCT) Ignition switch off 10 kΩ or higher
      z12-13 (GC0) - y1-7 (GND) Ignition switch off 10 kΩ or higher
      NOTE:

      When taking a measurement with a tester, do not apply excessive force to the tester probe to avoid damaging the holder.

    7. Reconnect the y1 and z12 battery voltage sensor connectors.
    8. Install the HV battery junction block assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE BATTERY VOLTAGE SENSOR. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

    Result: 

    NG 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR) 
    WARNING:

    Be sure to wear insulated gloves and protective goggles.

    1. Check that the service plug grip is not installed.
      NOTE:

      After removing the service plug grip, do not turn the ignition switch to ON (READY), unless instructed by the repair information because this may cause a malfunction.

    2. Remove the upper HV battery cover sub-assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    3. Check the wire harness and connectors of the battery temperature sensor for abnormalities by sight and touch.

      Specified Condition

      There are no open or short circuits in the wire harness and connectors. There are no short circuits to other wire harnesses.

    4. Install the upper HV battery cover sub-assembly.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE HYBRID BATTERY THERMISTOR. Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

    Result: 

    NG 

    REPAIR HARNESS OR CONNECTOR (BATTERY TEMPERATURE SENSOR) 

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