Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001N364
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): P0A8100,P0A8115; Hybrid/EV Battery Cooling Fan 1 Control Circuit High; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]

DTC

P0A8100

Hybrid/EV Battery Cooling Fan 1 Control Circuit High

DTC

P0A8115

Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open

DESCRIPTION

Refer to the description for DTC P0A8111.

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0A8100

Hybrid/EV Battery Cooling Fan 1 Control Circuit High

Both of the following conditions are met:

  • The HV battery temperature is high and the hybrid battery cooling fan speed calculated based on the battery cooling blower assembly output frequency (FP0) is not within the target control speed range.
  • The HV battery temperature is high and the battery cooling blower assembly speed is excessively high when a speed below a certain level is requested.

(1 trip detection logic)

  • Battery cooling blower assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

P0A8115

Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open

Both of the following conditions are met:

  • The speed calculated based on the battery cooling blower assembly output frequency (FP0) is not within the target control speed range.
  • The battery cooling blower assembly speed is excessively high when a speed below a certain level is requested.

(2 trip detection logic)

  • Battery cooling blower assembly
  • Battery ECU assembly

Comes on

Master Warning:

Comes on

Related Data List

DTC No.

Data List

P0A8100

  • Hybrid/EV Battery Cooling Fan 1 Drive Request
  • Hybrid/EV Battery Cooling Fan 1 Drive Status
  • Hybrid/EV Battery Cooling Fan 1 Frequency

P0A8115

The following items can be helpful when performing repairs:

Data List

  • Hybrid/EV Battery Temperature 1 to 6
  • BATT Voltage

HINT:

  • "Hybrid/EV Battery Cooling Fan 1 Frequency" is detected when the battery cooling blower assembly is operating and its value changes in proportion to the battery cooling blower assembly speed.
  • If the battery cooling blower assembly speed is excessively high, this DTC is stored.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the speed of the battery cooling blower assembly is higher than the target speed, it will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0A85 (INF P0A8100): Hybrid/EV Battery Cooling Fan 1 Control Circuit High

P0A85 (INF P0A8115): Hybrid/EV Battery Cooling Fan 1 Circuit Short to Auxiliary Battery or Open

Required sensors/components

Battery cooling blower assembly

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

1 driving cycle / 2 driving 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 P0A85 (INF P0A8100) is not detected

DTC P0A85 (INF P0A8115) 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

  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. Enter the following menus: Powertrain / HV Battery / Active Test / Control the Hybrid/EV Battery Cooling Fan.[*1]
  7. Select fan mode 6 and operate the battery cooling blower assembly and wait for 60 seconds or more.[*2]

    HINT:

    • Operation of the battery cooling blower assembly can be confirmed by checking if air is sucked into the air intake port of the intake duct or by operation sounds.
    • [*1] to [*2]: Normal judgment procedure.

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

  8. Enter the following menus: Powertrain / HV Battery / Utility / All Readiness.
  9. 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 driving pattern again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P0A8111.

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 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

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

P0A8100 or P0A8115 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 BATTERY ECU ASSEMBLY (FREQUENCY)

Click here 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with P610): P0A8111,P0A814B; Hybrid/EV Battery Cooling Fan 1 Circuit Short to Ground+

OK

REPLACE BATTERY COOLING BLOWER ASSEMBLY

NG

REPLACE BATTERY ECU ASSEMBLY