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Home >> Lexus >> 2025 >> RX 350h Premium >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Dynamic Rear Steering System - Diagnostic Codes & Symptom Tests >> Dynamic Rear Steering System >> DTC U0100-87: HEG Communication Error (CAN) (ADS_C1-Bus) Communication is Lost; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0131-87: Lost Communication With Power Steering Control Module Missing Message [10/2022 - ] >> Description
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DTC U0100-87: HEG Communication Error (CAN) (ADS_C1-Bus) Communication is Lost; DTC U0129-87: Lost Communication With Brake System Control Module Missing Message; DTC U0131-87: Lost Communication With Power Steering Control Module Missing Message [10/2022 - ]: Description

In order to prevent abnormal operation, the rear steering link assembly monitors CAN communication of the ECM, No. 2 skid control ECU, and EPS ECU.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate DTC Output from Priority
U0100-87 HEG Communication Error (CAN) (ADS_C1-Bus) Communication is Lost CAN communication from the ECM is interrupted
  • CAN communication system
  • Rear steering link assembly
  • ECM
 Displayed on MID DRS B
U0129-87 Lost Communication With Brake System Control Module Missing Message CAN communication from the No. 2 skid control ECU is interrupted
  • CAN communication system
  • Rear steering link assembly
  • No. 2 skid control ECU (brake actuator assembly)
 Displayed on MID DRS B
U0131-87 Lost Communication With Power Steering Control Module Missing Message CAN communication from the EPS ECU is interrupted
  • CAN communication system
  • Rear steering link assembly
  • Power steering ECU (rack and pinion power steering gear assembly)
 Displayed on MID DRS B
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