Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001N34P
Model Year Start: 2021 Model: Corolla Prod Date Range: [04/2020 - 09/2022]
Title: HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A9B2A,...,P306A62; Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

DTC

P0A9B2A

Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range

DTC

P0AC52A

Hybrid/EV Battery Temperature Sensor "B" Signal Stuck In Range

DTC

P0ACA2A

Hybrid/EV Battery Temperature Sensor "C" Signal Stuck In Range

DTC

P0AE82A

Hybrid/EV Battery Temperature Sensor "D" Signal Stuck In Range

DTC

P0BC22A

Hybrid/EV Battery Temperature Sensor "E" Signal Stuck In Range

DTC

P0C332A

Hybrid/EV Battery Temperature Sensor "F" Signal Stuck In Range

DTC

P306562

Hybrid/EV Battery Temperature Sensor "Group 1" Signal Compare Failure

DTC

P306A62

Hybrid/EV Battery Temperature Sensor "Group 2" Signal Compare Failure

DESCRIPTION

Refer to the description for DTC P0A9B11.

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A9B11,...,P0C3315; Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0A9B2A

Hybrid/EV Battery Temperature Sensor "A" Signal Stuck In Range

The performance of battery temperature sensor 0 is abnormal and its output is stuck.

(2 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

P0AC52A

Hybrid/EV Battery Temperature Sensor "B" Signal Stuck In Range

The performance of battery temperature sensor 1 is abnormal and its output is stuck.

(2 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

P0ACA2A

Hybrid/EV Battery Temperature Sensor "C" Signal Stuck In Range

The performance of battery temperature sensor 2 is abnormal and its output is stuck.

(2 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

P0AE82A

Hybrid/EV Battery Temperature Sensor "D" Signal Stuck In Range

The performance of battery temperature sensor 3 is abnormal and its output is stuck.

(2 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • No. 2 HV supply stack sub-assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

P0BC22A

Hybrid/EV Battery Temperature Sensor "E" Signal Stuck In Range

The performance of battery temperature sensor 4 is abnormal and its output is stuck.

(2 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • No. 2 HV supply stack sub-assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

P0C332A

Hybrid/EV Battery Temperature Sensor "F" Signal Stuck In Range

The performance of battery temperature sensor 5 is abnormal and its output is stuck.

(2 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • No. 2 HV supply stack sub-assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

P306562

Hybrid/EV Battery Temperature Sensor "Group 1" Signal Compare Failure

The performance of any battery temperature sensor (0 to 2) is abnormal and the difference in output between it and each other battery temperature sensor is excessively large.

(1 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

P306A62

Hybrid/EV Battery Temperature Sensor "Group 2" Signal Compare Failure

The performance of any battery temperature sensor (3 to 5) is abnormal and the difference in output between it and each other battery temperature sensor is excessively large.

(1 trip detection logic)
  • No. 1 HV supply stack sub-assembly
  • No. 2 HV supply stack sub-assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

Related Data List

DTC No.

Data List

P0A9B2A

Hybrid/EV Battery Temperature 1 to 6

P0AC52A

P0ACA2A

P0AE82A

P0BC22A

P0C332A

P306562

P306A62

HINT:

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

The following items can be helpful when performing repairs:

Data List

  • Vehicle Speed
  • Ambient Temperature

MONITOR DESCRIPTION

If the battery ECU assembly detects a malfunction in the HV battery temperature sensor, the battery ECU assembly illuminates the MIL and set a DTC.

MONITOR STRATEGY

Related DTCs

P0A9C (INF P0A9B2A), P0AC6 (INF P0AC52A), P0ACB (INF P0ACA2A), P0AE9 (INF P0AE82A), P0BC3 (INF P0BC22A), P0C34 (INF P0C332A): Battery temperature sensor malfunction (stuck)

P3065 (INF P306562), P306A (INF P306A62): Battery temperature sensor malfunction (deviation)

Required sensors/components

Battery temperature sensor

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

1 driving cycle / 2driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Battery ECU assembly

DTC P0A9C (INF P0A9B2A) is not detected

DTC P0AC6 (INF P0AC52A) is not detected

DTC P0ACB (INF P0ACA2A) is not detected

DTC P0AE9 (INF P0AE82A) is not detected

DTC P0BC3 (INF P0BC22A) is not detected

DTC P0C34 (INF P0C332A) is not detected

DTC P3065 (INF P306562) is not detected

DTC P306A (INF P306A62) is not detected

CONFIRMATION DRIVING PATTERN

HINT:

  • 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 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): UTILITY

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): DTC CHECK / CLEAR

P0A9B2A, P0AC52A, P0ACA2A, P0AE82A, P0BC22A, P0C332A:

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream 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. Turn the power switch on (IG) and turn the Techstream on.
  6. Drive the vehicle for approximately 10 minutes according to the freeze frame data items "Vehicle Speed", "Accelerator Position", "Hybrid/EV Battery Temperature 1 to 6" and "Hybrid/EV Battery Current" when ambient temperature is -10°C (14°F) or higher.[*1]

    HINT:

    • Check that the output of each battery temperature sensor varies.
    • Check that the difference in output between each battery temperature sensor is not excessively large.
    • [*1]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  7. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
  8. Check the DTC judgment result.

    HINT:

    • 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 the normal judgment procedure again.

P306562, P306A62:

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream 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. Turn the power switch on (IG) and turn the Techstream on.
  6. With power switch on (IG) and wait for 10 seconds or more when the ambient temperature is -10°C (14°F) or higher.[*1]

    HINT:

    • Check that the difference in output between each battery temperature sensor is not large.
    • [*1]: Normal judgment procedure.

      The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  7. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
  8. Check the DTC judgment result.

    HINT:

    • 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 the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A9B11.

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A9B11,...,P0C3315; Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground+

CAUTION / NOTICE / HINT

CAUTION:

  • Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.
    • Inspecting the high-voltage system
    • Disconnecting the low voltage connector of the inverter with converter assembly
    • Disconnecting the low voltage connector of the HV battery
  • To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.
  • After removing the service plug grip from the HV battery, 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 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): PRECAUTION

    HINT:

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

    *a

    Without waiting for 10 minutes
  • Make sure to insulate the high-voltage connectors and terminals of the HV battery with insulating tape after removing it.

    If the HV battery stored without insulating the connectors and terminals, electric shock or fire may result.

  • 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.

    *a

    Dealer

    *b

    Battery Collection Agent
    • Accidents such as electric shock may result if the HV battery is disposed of improperly or abandoned. Therefore, make sure to return all HV batteries through an authorized collection agent.
  • Before returning the HV battery, make sure to perform a recovery inspection.

    Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HV BATTERY (for LITHIUM-ION BATTERY): RECOVERY INSPECTION

  • Before returning the HV supply stack sub-assembly, make sure to perform a recovery inspection.

    Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HV BATTERY STACK (for LITHIUM-ION BATTERY): RECOVERY INSPECTION

  • Make a note of the output DTCs as some of them may be necessary for recovery inspection of the HV battery and HV supply stack sub-assemblies.
  • After removing the HV battery, keep it away from water. Exposure to water may cause the HV battery to produce heat, resulting in a fire.

NOTICE:

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 2021 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [04/2020 - 09/2022]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

PROCEDURE

1.

CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Enter the following menus: Powertrain / HV Battery and Hybrid Control / Trouble Codes.

(d) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

"P0A9B2A, P0AC52A, P0ACA2A, P0AE82A, P0BC22A, P0C332A, P306562 or P306A62" only is output, or DTCs except the ones in the table below are also output.

A

DTCs of hybrid battery system in the table below are output.

B

DTCs of hybrid control system in the table below are output.

C

System

Relevant DTC

Hybrid Battery System

P060A47

Hybrid/EV Battery Energy Control Module Monitoring Processor Watchdog / Safety MCU Failure

P060B49

Hybrid/EV Battery Energy Control Module A/D Processing Internal Electronic Failure

P060687

Hybrid/EV Battery Energy Control Module Processor to Monitoring Processor Missing Message

Hybrid Control System

P0A1F94

Hybrid/EV Battery Energy Control Module Unexpected Operation

(e) Turn the power switch off.

B

GO TO DTC CHART (HYBRID BATTERY SYSTEM)

C

GO TO DTC CHART (HYBRID CONTROL SYSTEM)

A

2.

CHECK DTC

(a) Check the DTCs that were output when the vehicle was brought to the workshop.

Result

Proceed to

"P0A9B2A, P0AC52A, P0ACA2A or P306562" is also output.

A

"P0AE82A, P0BC22A, P0C332A, , or P306A62" is also output.

B
B

GO TO STEP 4

A

3.

CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 0 to 2)

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A9B11,...,P0C3315; Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground+

OK

REPLACE BATTERY ECU ASSEMBLY

NG

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY

4.

CHECK HV BATTERY (BATTERY TEMPERATURE SENSOR 3 to 5)

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A9B11,...,P0C3315; Hybrid/EV Battery Temperature Sensor "A" Circuit Short to Ground+

OK

REPLACE BATTERY ECU ASSEMBLY

NG

5.

CHECK HARNESS AND CONNECTOR (BATTERY ECU ASSEMBLY - NO. 1 HV SUPPLY STACK SUB-ASSEMBLY)

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A9B1C,...,P0C331C; Hybrid/EV Battery Temperature Sensor "A" Voltage Out of Range+

OK

REPLACE NO. 2 HV SUPPLY STACK SUB-ASSEMBLY

NG

REPLACE NO. 1 HV SUPPLY STACK SUB-ASSEMBLY