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Home >> Lexus >> 2017 >> GS 450h Base >> Repair and Diagnosis >> Engine Mechanical >> Starter >> Smart Access System With Push-Button Start (For Entry Function) (Diagnostic Codes & Symptom Tests) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START(for Entry Function) >> Circuit Tests >> DTC B27A1: Open in Driver Side Electrical Antenna Circuit [09/2014 - ] >> Caution / Notice / Hint
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Caution / Notice / Hint

NOTE:
  • The smart access system with push-button start (for Entry Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - ] ). Troubleshoot the smart access system with push-button start (for Entry Function) after confirming that the communication systems are functioning properly.
  • When using the Techstream with the power switch off to troubleshoot:

    Connect the Techstream to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the smart access system with push-button start (for Entry Function) precaution (Refer to PRECAUTION [09/2014 - ] ).
  • After repair, confirm that no DTCs are output by performing the "DTC Output Confirmation Operation".
  • The front door outside handle assembly LH (for driver door) has an antenna coil between ANT1 and ANT2 terminals.
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