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Home >> Lexus >> 2017 >> NX 200t Base, AWD >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Power Steering System (Manual Tilt & Manual Telescopic Steering Column) - Diagnostic Codes & Symptom Tests >> POWER STEERING SYSTEM (for Manual Tilt and Manual Telescopic Steering Column) >> 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 [05/2019 - ] >> Description
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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 [05/2019 - ]: Description

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

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition
U0100 Lost Communication with ECM / PCM "A" Lost communication with ECM
  • CAN communication system
  • ECM
On After normal confirmation
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)
On After normal confirmation
U1104 Lost Communication with Driving Support ECU Lost communication with Forward recognition camera
  • CAN communication system
  • Forward recognition camera
Off After normal confirmation