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Home >> Lexus >> 2019 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Can Communication System - Circuit Tests (4 Of 9) >> Can Communication System >> Driving Support ECU Communication Stop Mode [12/2017 - 09/2018] >> Description

Driving Support ECU Communication Stop Mode [12/2017 - 09/2018]: Description

Detection Item Symptom Trouble Area
Driving Support ECU Communication Stop Mode Any of the following conditions are met:
  • Communication stop for "Driving Support (Cruise Control-ACC)" is indicated on the "Communication Bus Check" screen of the Techstream.

    Refer to DIAGNOSIS SYSTEM [12/2017 - 09/2018]

  • Communication stop history for "Driving Support (Cruise Control-ACC)" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Driving Support (Cruise Control-ACC)" is 6 or more.)

    Refer to PROBLEM SYMPTOMS TABLE [12/2017 - 10/2020]

  • Communication system DTCs (DTCs that start with U) that correspond to "Driving Support ECU Communication Stop Mode" in "DTC Combination Table" are output.

    Refer to DTC COMBINATION TABLE [12/2017 - 09/2018]

  • Driving support ECU assembly branch wire or connector
  • Power source circuit of driving support ECU assembly
  • Driving support ECU assembly ground circuit
  • Driving support ECU assembly