DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message [11/2022 - ]: Procedure

WARNING: This page is about a different car, the 2025 Toyota Corolla Cross, 2024 Toyota Corolla Cross, and 2023 Toyota Corolla Cross. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC OUTPUT (HV BATTERY)

Check for DTCs.
Powertrain > HV Battery > Trouble Codes

Turn the ignition switch off.

Result

Proceed to
NEXT

Result:

GO TO CAN COMMUNICATION SYSTEM

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2022 - 11/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - 12/2024] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2024 - ]