Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026PZ9
Model Year Start: 2023 Model: Corolla HV Prod Date Range: [09/2022 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): P1A8100,P1A8600; Hybrid/EV Battery Stack 1 Delta SOC High (Extreme); 2023 - 2025 MY Corolla HV [09/2022 -        ]

DTC

P1A8100

Hybrid/EV Battery Stack 1 Delta SOC High (Extreme)

DTC

P1A8600

Hybrid/EV Battery Stack 2 Delta SOC High (Extreme)

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors the difference in capacity of each HV battery cell to detect malfunctions of the HV battery.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P1A8100

Hybrid/EV Battery Stack 1 Delta SOC High (Extreme)

The difference in capacity of each cell of the No. 1 HV supply stack sub-assembly exceeds the specified value excessively.

(1 trip detection logic)
  • HV battery
  • Battery ECU assembly
  • HV battery junction block assembly

Comes on

Master Warning:

Comes on

SAE Code: P1A81

P1A8600

Hybrid/EV Battery Stack 2 Delta SOC High (Extreme)

The difference in capacity of each cell of the No. 2 HV supply stack sub-assembly exceeds the specified value excessively.

(1 trip detection logic)
  • HV battery
  • Battery ECU assembly
  • HV battery junction block assembly

Comes on

Master Warning:

Comes on

SAE Code: P1A86

HINT:

These DTCs can be stored after clearing the DTCs and driving the vehicle for approximately 10 minutes.

MONITOR DESCRIPTION

If the battery ECU assembly detects that the difference in capacity of each HV battery cell exceeds the specified value (excessively), the battery ECU assembly illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Related DTCs

P1A81 (INF P1A8100), P1A86 (INF P1A8600): Battery cell malfunction

Required sensors/components

Battery ECU assembly

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

1 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 P1A81 (INF P1A8100) is not detected

DTC P1A86 (INF P1A8600) 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 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): UTILITY

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

    Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): DTC CHECK / CLEAR

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the GTS on.
  6. Drive the vehicle on urban roads for approximately 10 minutes.[*1]

    HINT:

    [*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, perform the normal judgment procedure again.

WIRING DIAGRAM

Refer to the wiring diagram for DTC P1A001C.

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): P1A001C,P301A1C; Hybrid Battery Stack 2 Cell Voltage Detection Voltage Out of Range+

CAUTION / NOTICE / HINT

CAUTION:

Refer to the precautions before inspecting high voltage circuit.

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): PRECAUTION

NOTICE:

  • After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY

  • When disconnecting and reconnecting the auxiliary battery

    HINT:

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART

PROCEDURE

1.

CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)

(a) Check for DTCs.

Powertrain > HV Battery > Trouble Codes

Powertrain > Hybrid Control > Trouble Codes

Result

Proceed to

"P1A8100 or P1A8600" 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

P0ABF28

Hybrid/EV Battery Current Sensor "A" Signal Bias Level Out of Range / Zero Adjustment Failure

P0ABF2A

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

P1CBB12

Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Auxiliary Battery

P1CBB14

Hybrid/EV Battery Current Sensor Power Supply Circuit Short to Ground or Open

P1CC81E

Hybrid/EV Battery Stack 1 Voltage Difference Out of Range

P1CC91E

Hybrid/EV Battery Stack 2 Voltage Difference Out of Range

Hybrid control system

P0A1F94

Hybrid/EV Battery Energy Control Module Unexpected Operation

P0B231C

Hybrid/EV Battery "A" Voltage Sensor Voltage Out of Range

P1C2D62

Hybrid/EV Battery "A" Voltage Sensor/ Boosting Converter Voltage Sensor "A" Signal Compare Failure

(b) Turn the ignition 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

"P1A8100" is also output.

A

"P1A8600" is also output.

B
B

GO TO STEP 7

A

3.

CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

(a) Read the value of freeze frame data items "Hybrid/EV Battery Cell 1 Voltage" through "Hybrid/EV Battery Cell 56 Voltage" for DTC P1A8100 and make a note if the value of any is the lowest voltage value.

Powertrain > HV Battery > Trouble Codes

(b) Turn the ignition switch off.

NEXT

4.

CHECK BATTERY ECU ASSEMBLY (GA0 - VA28)

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): P0E2D00; Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance+

Result

Proceed to

The voltage between the terminals is 50 kΩ or more.

A

Other than above

B
B

REPLACE BATTERY ECU ASSEMBLY

A

5.

CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the vehicle has been driven.

Result

Proceed to

Total distance driven is less than 200000 km (124280 mile)

A

Total distance driven is 200000 km (124280 mile) or more

Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1

Other than above

B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

A

REPLACE HV BATTERY

B

6.

REPLACE HV BATTERY

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HV BATTERY (for LITHIUM-ION BATTERY): REMOVAL

NEXT

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY

7.

CHECK FREEZE FRAME DATA (HYBRID/EV BATTERY CELL VOLTAGE)

(a) Read the value of freeze frame data items "Hybrid/EV Battery Cell 29 Voltage" through "Hybrid/EV Battery Cell 56 Voltage" for DTC P1A8600 and make a note if the value of any is the lowest voltage value.

Powertrain > HV Battery > Trouble Codes

(b) Turn the ignition switch off.

NEXT

8.

CHECK BATTERY ECU ASSEMBLY (VAD - VA56)

Click here 2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): P0E2D00; Hybrid/EV Battery Energy Control Module Hybrid/EV Battery Monitor Performance+

Result

Proceed to

The voltage between the terminals is 50 kΩ or more.

A

Other than above

B
B

REPLACE BATTERY ECU ASSEMBLY

A

9.

CHECK TOTAL DISTANCE DRIVEN

(a) Read the odometer to check the total distance the vehicle has been driven.

Result

Proceed to

Total distance driven is less than 200000 km (124280 mile)

A

Total distance driven is 200000 km (124280 mile) or more

Current total distance driven - total distance driven when HV battery junction block assembly replaced = less than 200000 km (124280 mile) *1

Other than above

B

HINT:

*1: If the HV battery junction block assembly has been replaced, use the total distance driven since it was replaced.

A

REPLACE HV BATTERY

B

10.

REPLACE HV BATTERY

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HV BATTERY (for LITHIUM-ION BATTERY): REMOVAL

NEXT

REPLACE HV BATTERY JUNCTION BLOCK ASSEMBLY