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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (1 Of 9) & Diagnostic Codes >> Can Communication System >> DTC U1170: Lost Communication with Brake System Control Module(Chassis Local Bus) [12/2017 - 10/2020] >> Description

DTC U1170: Lost Communication with Brake System Control Module(Chassis Local Bus) [12/2017 - 10/2020]: Description

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U1170 Lost Communication with Brake System Control Module(Chassis Local Bus)
  • Communication stop occurs between the brake actuator assembly (skid control ECU) and ECU or sensor outputs DTC(s)*1
  • Communication stop occurs between the skid control ECU assembly and ECU or sensor outputs DTC(s)*2
  • Front active stabilizer control ECU assembly
  • Front active stabilizer control ECU assembly CAN branch wire or connector
  • Rear active stabilizer control ECU assembly
  • Rear active stabilizer control ECU assembly CAN branch wire or connector
DTC Output from 
  • Rear active stabilizer control ECU assembly
  • Front active stabilizer control ECU assembly
  1. *1: w/ Vacuum Brake Booster
  2. *2: w/o Vacuum Brake Booster