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Home >> Toyota >> 2017 >> RAV4 XLE, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Lane Departure Alert System - Diagnostic Codes & Circuit Tests - (Except Hybrid) >> Lane Departure Alert System >> DTC U0101: Lost Communication with ECM; 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) [12/2012 - 10/2015] >> Procedure
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DTC U0101: Lost Communication with ECM; 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) [12/2012 - 10/2015]: Procedure

  1. CLEAR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Enter the following menus: Chassis / Lane Departure Alert / Clear DTCs.
    4. Clear the DTCs.

      Chassis > Lane Departure Alert > Clear DTCs 

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Enter the following menus: Chassis / Lane Departure Alert / Trouble Codes.
    4. Check for DTCs.

      Chassis > Lane Departure Alert > Trouble Codes 

      Result Proceed to
      No DTCs are output
      CAN DTCs are output

    Result: 

    No DTCs are output 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2012 - 11/2013]  or  HOW TO PROCEED WITH TROUBLESHOOTING [11/2013 - 10/2015]  . 

    Result: 

    CAN DTCs are output 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2012 - 10/2015]  .