LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2018 >> GS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Transmission >> Transfer Case >> All Wheel Drive Control System - Diagnostic Codes & Symptom Tests >> Four Wheel Drive Control System >> DTC U0073-86: Control Module Communication Bus OFF; DTC U0100-85: Lost Communication with ECM / PCM "A"; DTC U0126-84: Lost Communication with Steering Angle Sensor Module; DTC U0129-83: Lost Communication with Brake System Control Module [09/2014 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC U0073-86: Control Module Communication Bus OFF; DTC U0100-85: Lost Communication with ECM / PCM "A"; DTC U0126-84: Lost Communication with Steering Angle Sensor Module; DTC U0129-83: Lost Communication with Brake System Control Module [09/2014 - ]: Procedure

  1. CHECK DTC 
    1. Check DTC (Refer to DTC CHECK / CLEAR [09/2014 - ] ).
    2. Record the output DTC (4WD control system).

      HINT: 

      When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

    Result: 

    NEXT 

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITHTROUBLESHOOTING) 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 10/2015] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ] )