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Home >> Lexus >> 2019 >> GX 460 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Access System (Entry Function) (Diagnostic Codes & Symptom Tests) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) >> DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit [08/2015 - 08/2019] >> 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 [08/2015 - 08/2019] ). 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 engine 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, refer to the smart access system with push-button start (for Entry Function) (Refer to PRECAUTION [08/2015 - 08/2019] ).
  • After repair, confirm DTC not reoccur with performing the "DTC Output Confirmation Operation".
  • Indoor No. 1 electrical key antenna assembly (front floor) has an antenna coil between CLG3 and CLGB terminals.
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