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Home >> Lexus >> 2013 >> GS 350 Base, RWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Smart Access System (Keyless Entry) (Diagnostic Codes & Symptom Tests) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) >> DTC B27A5: Open in Front Floor Electrical Key Oscillator Circuit >> Inspection Procedure
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Inspection Procedure

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 [12/2011 - ] . 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 (smart key ECU assembly), refer to the smart access system with push-button start (for Entry Function) precaution. Refer to PRECAUTION [12/2011 - ] .
  • After repair, confirm that no DTCs are output by performing the "DTC Output Confirmation Operation".
  • The No. 1 indoor electrical key antenna assembly (front floor) has an antenna coil between ANTE5 and CLGB terminals.
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