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Home >> Lexus >> 2019 >> GS F >> Repair and Diagnosis (Single Page) >> Steering >> Manual Steering >> Power Steering System - Diagnostic Codes And Circuit Tests >> Power Steering System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0132: Lost Communication with Ride Level Control Module; DTC U1104: Lost Communication with Driving Support ECU [09/2016 - ] >> Description

DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0132: Lost Communication with Ride Level Control Module; DTC U1104: Lost Communication with Driving Support ECU [09/2016 - ]: Description

The power steering ECU inputs and outputs ECM, skid control ECU, absorber control ECU and forward recognition camera signals via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
U0100 Lost Communication with ECM / PCM "A" Lost communication with ECM
  • CAN communication system
  • ECM
 EPS warning light: Does not come on -
U0129 Lost Communication with Brake System Control Module Lost communication with skid control ECU (brake actuator assembly)
  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
 EPS warning light: Comes on -
U0132 Lost Communication with Ride Level Control Module Lost communication with absorber control ECU
  • CAN communication system
  • Absorber control ECU
 EPS warning light: Does not come on -
U1104 Lost Communication with Driving Support ECU Lost Communication with Forward Recognition Camera
  • CAN communication system
  • Forward Recognition Camera
 EPS warning light: Does not come on w/ Pre-collision System
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