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Home >> Lexus >> 2017 >> LS 460 Base, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Power Steering System - Diagnostic Codes & Symptom Tests >> Power Steering System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with Steering Effort Control Module; DTC U1104: Lost Communication with Driving Support ECU; DTC U1105: Lost Communication with Parking Assist ECU [09/2015 - ] >> Description

DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with Steering Effort Control Module; DTC U1104: Lost Communication with Driving Support ECU; DTC U1105: Lost Communication with Parking Assist ECU [09/2015 - ]: Description

The power steering ECU inputs and outputs driving support ECU, clearance warning ECU, ECM, skid control ECU, and steering control ECU signals via CAN communication.

DTC No. DTC Detection Condition Trouble Area
U0100 ECM communication error
  • CAN communication system
  • ECM (when only U0105 is output)
U0129 Skid control ECU communication error
  • CAN communication system
  • Skid control ECU (when only U0129 is output)
U0130 Steering control ECU communication error
  • CAN communication system
  • Steering control ECU (when only U0130 is output)
U1104 Driving support ECU communication error
  • CAN communication system
  • Driving support ECU (when only U1104 is output)
U01105 Clearance warning ECU communication error
  • CAN communication system
  • Clearance warning ECU (when only U1105 is output)

HINT: 

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.

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