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Home >> Toyota >> 2022 >> Corolla Cross L, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 103 (Engine Control System (M20A-FKS) - Diagnostic Codes (6 Of 6)) >> SFI SYSTEM (for K121) >> DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message [11/2023 - ] >> Description

DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message [11/2023 - ]: Description

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

The ECM and skid control ECU (brake actuator assembly) send and receive signals via CAN communication.

If a communication error occurs between the ECM and skid control ECU (brake actuator assembly), the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note
U115C-87 Lost Communication with ECM/PCM "A" (ch5) Missing Message There is no communication between the ECM and skid control ECU (brake actuator assembly) (1 trip detection logic).
  • CAN communication system
  • Skid control ECU (brake actuator assembly)
  • ECM
Does not come on
  • SAE Code: U115C
  • DTC for Mexico Models: Applies