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Home >> Lexus >> 2016 >> RX 350 Base, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Diagnostic Codes & Symptom Tests >> SFI System >> DTC U1104-87: Lost Communication with Driving Support ECU Missing Message [09/2015 - 12/2017] >> Description

DTC U1104-87: Lost Communication with Driving Support ECU Missing Message [09/2015 - 12/2017]: Description

The ECM and driving support ECU assembly send and receive signals via CAN communication.

If a communication error occurs between the ECM and driving support ECU assembly, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
U1104-87 Lost Communication with Driving Support ECU Missing Message There is no communication between the ECM and driving support ECU assembly (1 trip detection logic).
  • CAN communication system
  • Driving support ECU assembly
  • ECM
Does not come on DTC stored SAE Code: U1104