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Home >> Lexus >> 2015 >> IS 250 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Lane Departure Alert System - Diagnostic Codes & Circuit Tests >> Lane Departure Alert System >> DTC U0101: Lost Communication with TCM; DTC U0104: Lost Communication with Cruise Control Module; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module (Combination Meter) [04/2013 - 10/2016] >> Procedure
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DTC U0101: Lost Communication with TCM; DTC U0104: Lost Communication with Cruise Control Module; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module (Combination Meter) [04/2013 - 10/2016]: Procedure

  1. CHECK FOR DTCs (LANE DEPARTURE ALERT) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [04/2013 - 10/2016]

      Chassis > Lane Departure Alert > Clear DTCs 

    2. Check the DTCs.

      Refer to DTC CHECK / CLEAR [04/2013 - 10/2016]

      Chassis > Lane Departure Alert > Trouble Codes 

      Result

      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system DTCs are output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 06/2014]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2014 - 08/2015]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 10/2016] 

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2013 - 10/2016]