Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000026PUW
Model Year Start: 2023 Model: Corolla HV Prod Date Range: [09/2022 -           ]
Title: HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): PROBLEM SYMPTOMS TABLE; 2023 - 2025 MY Corolla HV [09/2022 -        ]

PROBLEM SYMPTOMS TABLE

Hybrid Control System

Symptom

Suspected Area

Link

Cannot enter EV mode

CAN Communication System

2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

Pattern Select Switch EV Mode Circuit

2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): Pattern Select Switch EV Mode Circuit

EV mode switch (electric parking brake switch assembly)

2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; HYBRID / BATTERY CONTROL: COMBINATION SWITCH: INSPECTION

Combination meter assembly

2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for 12.3 Inch Display): HOW TO PROCEED WITH TROUBLESHOOTING 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for 12.3 Inch Display): HOW TO PROCEED WITH TROUBLESHOOTING

Cannot enter Sport/Eco/Normal mode

CAN Communication System

2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

Drive mode select switch (combination switch assembly)

2023 - 2025 MY Corolla Corolla Hatchback Corolla HV [09/2022 -        ]; PA10 (HYBRID TRANSMISSION / TRANSAXLE): PATTERN SELECT SWITCH: INSPECTION

Drive Mode Select Switch Circuit

2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): Drive Mode Select Switch Circuit

Combination meter assembly

2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for 12.3 Inch Display): HOW TO PROCEED WITH TROUBLESHOOTING 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; METER / GAUGE / DISPLAY: METER / GAUGE SYSTEM (for 12.3 Inch Display): HOW TO PROCEED WITH TROUBLESHOOTING

Hunting (Poor idle)

Drive Start Control

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

Hesitation and/or poor acceleration

Brake Override System

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

Drive Start Control

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

Shift position indicator is malfunctioning

Indicator Circuit

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

Ignition switch does not turn to ON (READY)

Smart Key System (for Start Function, HV Model)

2023 MY Corolla Corolla HV [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

ECU Power Source Circuit (Hybrid Control System)

2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM (for LITHIUM-ION BATTERY with PA10): ECU Power Source Circuit

Hybrid vehicle control ECU

2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

ECM

2023 MY Corolla Corolla HV [09/2022 - 11/2022]; 2ZR-FXE (ENGINE CONTROL): ECM: REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): ECM: REMOVAL

Loud rattle from hybrid vehicle transaxle

Check idle learning

2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: INITIALIZATION

Transmission input damper assembly

2023 MY Corolla Corolla HV [09/2022 - 11/2022]; 2ZR-FXE (ENGINE MECHANICAL): REAR CRANKSHAFT OIL SEAL: REMOVAL 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; 2ZR-FXE (ENGINE MECHANICAL): REAR CRANKSHAFT OIL SEAL: REMOVAL

Hybrid vehicle transaxle assembly

2023 MY Corolla Corolla Hatchback Corolla HV [09/2022 - 11/2022]; PA10 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV [11/2022 -        ]; PA10 (HYBRID TRANSMISSION / TRANSAXLE): HYBRID VEHICLE TRANSAXLE: REMOVAL

Engine misfire

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"Maintenance Required for Traction Battery Cooling Parts See Owner's Manual" is displayed on the multi-information display.

Make sure the HV battery cooling system intake port is not blocked.

-

Make sure there are no gaps between the connecting parts of the ducts.

-

Clean the No. 1 HV battery intake filter.

Check for entry of foreign matter.

2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; HYBRID / BATTERY CONTROL: BATTERY COOLING FILTER: INSPECTION

Abnormal sound is heard from the area around the No. 1 hybrid battery intake duct.

Make sure the HV battery cooling system intake port is not blocked.

-

Make sure there are no gaps between the connecting parts of the ducts.

-

Clean the No. 1 HV battery intake filter.

Check for entry of foreign matter.

2020 - 2025 MY Corolla Corolla HV [01/2019 -        ]; HYBRID / BATTERY CONTROL: BATTERY COOLING FILTER: INSPECTION

"Have Traction Battery Inspected" is displayed on the multi-information display.

"Have Traction Battery Inspected" is displayed.

2023 - 2025 MY Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID BATTERY SYSTEM (for LITHIUM-ION BATTERY with PA10): "HAVE TRACTION BATTERY INSPECTED" is displayed