Problem Symptoms Table [09/2022 - ]
WARNING: This page is about a different car, the 2025 Toyota Corolla, 2024 Toyota Corolla, and 2023 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
HYBRID CONTROL SYSTEM
| Symptom | Suspected Area | Link |
|---|---|---|
| Cannot enter EV mode | CAN Communication System | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ] |
| Pattern Select Switch EV Mode Circuit | Refer to Pattern Select Switch EV Mode Circuit [09/2022 - ] | |
| EV mode switch (electric parking brake switch assembly) | Refer to INSPECTION [01/2019 - ] | |
| Combination meter assembly | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2022 - ] | |
| Cannot enter Sport/Eco/Normal mode | CAN Communication System | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ] |
| Drive mode select switch (combination switch assembly) | Refer to INSPECTION [09/2022 - ] | |
| Drive Mode Select Switch Circuit | Refer to Drive Mode Select Switch Circuit [09/2022 - ] | |
| Combination meter assembly | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2022 - ] | |
| Hunting (Poor idle) | Drive Start Control | Refer to Drive Start Control [09/2022 - ] |
| Hesitation and/or poor acceleration | Brake Override System | Refer to Brake Override System [09/2022 - ] |
| Drive Start Control | Refer to Drive Start Control [09/2022 - ] | |
| Shift position indicator is malfunctioning | Indicator Circuit | Refer to Indicator Circuit [09/2022 - ] |
| Ignition switch does not turn to ON (READY) | Smart Key System (for Start Function, HV Model) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2022 - ] |
| ECU Power Source Circuit (Hybrid Control System) | Refer to ECU Power Source Circuit [09/2022 - ] | |
| Hybrid vehicle control ECU | Refer to REMOVAL [09/2022 - ] | |
| ECM | Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - ] | |
| Loud rattle from hybrid vehicle transaxle | Check idle learning | Refer to INITIALIZATION [09/2022 - ] |
| Transmission input damper assembly | Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - ] | |
| Hybrid vehicle transaxle assembly | Refer to REMOVAL [09/2022 - 11/2022] , or refer to REMOVAL [11/2022 - ] | |
| Engine misfire | - | |
| "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. |
Refer to INSPECTION [01/2019 - ] | |
| 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. |
Refer to INSPECTION [01/2019 - ] | |
| "Have Traction Battery Inspected" is displayed on the multi-information display. | "Have Traction Battery Inspected" is displayed. | Refer to "HAVE TRACTION BATTERY INSPECTED" is displayed [09/2022 - ] |