HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A9B11, P0A9B15, P0AC511, P0AC515, P0ACA11, P0ACA15

DTC Code DTC Name
P0A9B11 Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground
P0A9B15 Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open
P0AC511 Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Ground
P0AC515 Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Auxiliary Battery or Open
P0ACA11 Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Ground
P0ACA15 Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open

DESCRIPTION

The battery temperature sensors are provided at 3 locations of the HV battery. The resistance of the thermistor, which is built into each battery temperature sensor, varies in accordance with changes in the HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery voltage sensor uses the battery temperature sensors to detect the HV battery temperature, and sends the detected value to the hybrid vehicle control ECU. Based on the results of this detection, the hybrid vehicle control ECU controls the blower fan. (The blower fan starts when the HV battery temperature rises above a predetermined level.)

Temperature Sensor Identification Cross Reference Table
DTC Title Sensor Battery Temperature Sensor GTS Display
A 0 1
B 1 2
C 2 3

Tech Tips

Use the reference table above to determine which battery temperature sensor each DTC corresponds to. For example, sensor A in the DTC title column is battery temperature sensor 0. This sensor is displayed as Hybrid Battery Temperature 1 in the Data List.

B004QQOE05
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A9B11 Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground

The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery thermistor

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on
P0A9B15 Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Auxiliary Battery or Open

The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery thermistor

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on
P0AC511 Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Ground

The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery thermistor

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on
P0AC515 Hybrid/EV Battery Temperature Sensor "B" Circuit Short to Auxiliary Battery or Open

The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery thermistor

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on
P0ACA11 Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Ground

The battery temperature sensor is malfunctioning, its output voltage is lower than the specified value (short circuit) and the detected temperature is higher than the specified value.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery thermistor

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on
P0ACA15 Hybrid/EV Battery Temperature Sensor "C" Circuit Short to Auxiliary Battery or Open

The battery temperature sensor is malfunctioning, its output voltage is higher than the specified value (short to +B or open) and the detected temperature is lower than the specified value.

(1 trip detection logic)

  • Battery voltage sensor

  • Hybrid battery thermistor

  • Wire harness or connector

 Comes on

Master Warning Light:

Comes on
Temperature Displayed Malfunction
Below -45°C (-49°F) Open or +B short circuit
95°C (203°F) or more GND short circuit
Related Data List
DTC No. Data List
P0A9B11 Hybrid Battery Temperature 1 to 3
P0A9B15
P0AC511
P0AC515
P0ACA11
P0ACA15

Tech Tips


  • After checking for the above DTCs, check the hybrid system Data List item "Hybrid Battery Temperature" using the GTS.

  • If the vehicle as is left as is for 24 hours, the value of "Hybrid Battery Temperature" will be almost the same as the ambient temperature.

CONFIRMATION DRIVING PATTERN

Tech Tips

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

Click here


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the power switch off and wait for 2 minutes or more.

  5. With power switch on (IG) and wait for 5 seconds or more.

  6. Enter the following menus: Powertrain / Hybrid Control / Utility / All Readiness.

  7. Check the DTC judgment result.

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9B2A.

Click here

CAUTION / NOTICE / HINT

CAUTION:


  • Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

    Click here

    Tech Tips

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

  • When disposing of an HV battery, make sure to return it through an authorized collection agent who is capable of handling it safely. If the HV battery is returned via the manufacturer specified route, it will be returned properly and in a safe manner by an authorized collection agent.

Note

After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

Click here

PROCEDURE


  1. CHECK DTC OUTPUT (HYBRID CONTROL)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes.


      Powertrain > Hybrid Control > Trouble Codes

    4. Check for DTCs.

      Result
      Result Proceed to
      P0AFC00, P0AFC96 or P308A12 is output A
      Other than above B

    5. Turn the power switch off.


    A

    GO TO DTC CHART (HYBRID CONTROL SYSTEM) Click here

    B

  2. READ VALUE USING GTS (HYBRID BATTERY TEMPERATURE)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

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


      Powertrain > Hybrid Control > Data List
      Tester Display
      Hybrid Battery Temperature 1
      Hybrid Battery Temperature 2
      Hybrid Battery Temperature 3

    4. Read the Data List.


      Powertrain > Hybrid Control > Data List
      Tester Display Measurement Item Range Reference Value Diagnostic Note
      Hybrid Battery Temperature 1 HV battery temperature sensor output. -50 to 205.9°C (-58 to 402.6°F) Same as ambient temperature (left as is for 24 hours)

      • Battery temperature sensor

      • Battery voltage sensor
      Hybrid Battery Temperature 2 HV battery temperature sensor output. -50 to 205.9°C (-58 to 402.6°F) Same as ambient temperature (left as is for 24 hours)

      • Battery temperature sensor

      • Battery voltage sensor
      Hybrid Battery Temperature 3 HV battery temperature sensor output. -50 to 205.9°C (-58 to 402.6°F) Same as ambient temperature (left as is for 24 hours)

      • Battery temperature sensor

      • Battery voltage sensor

      Tech Tips

      A malfunctioning sensor (battery temperature sensor 0, 1 or 2) can be determined by comparing the output temperature of the 3 battery temperature sensors.

    5. Turn the power switch off.

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK CONNECTOR CONNECTION CONDITION (BATTERY TEMPERATURE SENSOR)

    CAUTION:

    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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the No. 1 hybrid battery exhaust duct.

      Tech Tips

      Click here

    3. B004Q62N04

      Check the connections of the z9 battery voltage sensor connector.

      Tech Tips

      Click here

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

    4. Install the No. 1 hybrid battery exhaust duct.


    NG

    CONNECT SECURELY

    OK

  4. CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR)

    CAUTION:

    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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the No. 1 hybrid battery exhaust duct.

      Tech Tips

      Click here

    3. Disconnect the z9 battery voltage sensor connector.

      Note

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

    4. B004QJFC05
      *a

      Rear view of wire harness connector

      (to Battery Voltage Sensor)

      Measure the resistance of the circuit for the malfunctioning sensor (battery temperature sensor 0 to 2).

      Tester Connection
      Tester Connection Battery Temperature Sensor
      z9-4 (TB0) - z9-10 (GB0) 0
      z9-3 (TB1) - z9-9 (GB1) 1
      z9-2 (TB2) - z9-8 (GB2) 2
      Standard Resistance
      Thermistor Temperature Condition Specified Condition
      0°C (32°F) Power switch off 26.7 to 27.8 kΩ
      25°C (77°F) Power switch off 9.9 to 10.1 kΩ
      40°C (104°F) Power switch off 5.73 to 5.92 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 M35 battery voltage sensor connector.

      Note

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

    6. B004PXQC06
      *a

      Rear view of wire harness connector

      (to Battery Voltage Sensor)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      z9-4 (TB0) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-4 (TB0) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-10 (GB0) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-10 (GB0) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-3 (TB1) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-3 (TB1) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-9 (GB1) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-9 (GB1) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-2 (TB2) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-2 (TB2) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-8 (GB2) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-8 (GB2) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-1 (TC0) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-1 (TC0) - M35-5 (GND) Power switch off 10 kΩ or higher
      z9-7 (GC0) - M35-1 (IGCT) Power switch off 10 kΩ or higher
      z9-7 (GC0) - M35-5 (GND) Power 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 M35 and z9 battery voltage sensor connectors.

    8. Install the No. 1 hybrid battery exhaust duct.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE BATTERY VOLTAGE SENSOR Click here

    NG

  5. CHECK HARNESS AND CONNECTOR (BATTERY TEMPERATURE SENSOR)

    CAUTION:

    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 power switch on (READY), unless instructed by the repair manual because this may cause a malfunction.

    2. Remove the upper No. 1 hybrid battery cover sub-assembly.

      Tech Tips

      Click here

    3. Check the wire harness and connectors of the battery temperature sensors 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.

      Tech Tips

      As the wire harness of the battery temperature sensors is not available as a supply part, if it cannot be repaired, replace the HV battery.

    4. Install the upper No. 1 hybrid battery cover sub-assembly.

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE HYBRID BATTERY THERMISTOR Click here

    NG

    REPAIR HARNESS OR CONNECTOR (BATTERY TEMPERATURE SENSOR)