Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026PZG
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): P33DA1E,P33DB1E; Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range; 2023 - 2025 MY Corolla HV [09/2022 -        ]

DTC

P33DA1E

Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range

DTC

P33DB1E

Hybrid/EV Battery Stack 2 Circuit Resistance Out of Range

DESCRIPTION

The HV battery is composed of 56 cells (3.7 V each) in series. The battery ECU assembly monitors the internal resistance 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

P33DA1E

Hybrid/EV Battery Stack 1 Circuit Resistance Out of Range

The difference in internal resistance of each cell of the No. 1 HV supply stack sub-assembly exceeds the threshold.

(1 trip detection logic)

  • HV battery
  • HV battery junction block assembly

Comes on

Master Warning:

Comes on

SAE Code: P33DA

P33DB1E

Hybrid/EV Battery Stack 2 Circuit Resistance Out of Range

The difference in internal resistance of each cell of the No. 2 HV supply stack sub-assembly exceeds the threshold.

(1 trip detection logic)

  • HV battery
  • HV battery junction block assembly

Comes on

Master Warning:

Comes on

SAE Code: P33DB

HINT:

  • These DTCs can be stored after clearing DTCs and driving the vehicle for approximately 10 minutes.
  • In order to ensure HV battery performance, appropriate cooling performance must be maintained. Perform the following items as necessary. If cooling performance has decreased and "Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display, make sure to perform the following items:
    • Make sure the air intake port for HV battery is not blocked.
    • Make sure there are no gaps between the connecting parts of the ducts.
    • Clean the No. 1 HV battery intake filter.
      • Clear the DTCs to reset the learning values even if no DTCs are stored.

MONITOR DESCRIPTION

If there is an abnormal internal resistance in the battery cells, the battery ECU assembly determines that a malfunction has occurred. When the malfunction detection condition is satisfied, the battery ECU assembly will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P33DA (INF P33DA1E), P33DB (INF P33DB1E): Battery cell malfunction

Required sensors/components

Battery ECU assembly / Battery current sensor

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 P33DA (INF P33DA1E) is not detected

DTC P33DB (INF P33DB1E) 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]

    (This DTC may not be stored if the vehicle is stopped or being driven at a constant speed.)

    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.

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 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

2.

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