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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System (Except HV) - Circuit Tests (1 Of 8) & Diagnostic Codes >> CAN COMMUNICATION SYSTEM (for Gasoline Model) >> DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message [11/2023 - ] >> Description

DTC U115C-87: Lost Communication with ECM/PCM "A" (ch5) Missing Message; DTC U1170-87: Lost Communication with Brake System Control Module (ch2) Missing Message [11/2023 - ]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U115C-87 Lost Communication with ECM/PCM "A" (ch5) Missing Message Communication stops between the engine stop and start ECU and the brake actuator assembly.
  • CAN main/branch bus lines or connector
  • Engine stop and start ECU
  • Brake actuator assembly
  • No. 12 global CAN junction connector
 DTC Output from
  • Engine stop and start ECU
U1170-87 Lost Communication with Brake System Control Module (ch2) Missing Message Communication stops between the engine stop and start ECU and the brake actuator assembly.
  • CAN main/branch bus lines or connector
  • Engine stop and start ECU
  • Brake actuator assembly
  • No. 12 global CAN junction connector
 DTC Output from
  • Engine stop and start ECU
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