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Home >> Lexus >> 2015 >> LS 460 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Radar Cruise Control System (Diagnostic Codes & Circuit Tests) >> Dynamic Radar Cruise Control System >> DTC C1A03: Driving Support ECU Internal Logical Error; DTC C1A06: Stop Light Switch Input Circuit [10/2014 - ] >> Procedure
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DTC C1A03: Driving Support ECU Internal Logical Error; DTC C1A06: Stop Light Switch Input Circuit [10/2014 - ]: Procedure

  1. CHECK FOR DTC 
    1. Clear the DTC. Refer to DTC CHECK / CLEAR [10/2014 - ] .
    2. Check for DTC. Refer to DTC CHECK / CLEAR [10/2014 - ] .

      OK

      DTC C1A03 or C1A06 is not output.

    NG → See step   2 

    OK → See step   3 

  2. REPLACE DRIVING SUPPORT ECU. Refer to  REMOVAL [10/2014 - ] 
  3. USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]