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Home >> Lexus >> 2017 >> ES 350 >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Power Steering System (Diagnostic Codes & Circuit Tests) >> Power Steering System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U1104: Lost Communication with Driving Support ECU [07/2015 - ] >> Description

DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U1104: Lost Communication with Driving Support ECU [07/2015 - ]: Description

The power steering ECU assembly receives signals from the ECM, skid control ECU (brake actuator assembly) and forward recognition camera (w/ Front Recognition Camera System) via the CAN communication system.

DTC No. DTC Detection Condition Trouble Area
U0100 Lost communication with ECM
  • CAN communication system
  • ECM
U0129 Lost communication with skid control ECU
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
U1104* Lost communication with forward recognition camera
  • CAN communication system
  • Forward recognition camera

*: w/ Front Recognition Camera System

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