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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) >> Symptom Tests >> All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [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 the CAN communication system and LIN communication system. First inspect the communication systems 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.

  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.
  • Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - ] ).
  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • Recognition code registration is necessary when replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU).
  • Before replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU), 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 door control receiver has a constant voltage (5 V) supply circuit connected to terminal "+5".
  • When replacing the door control receiver, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the Techstream and write them down before removal (Refer to REGISTRATION [09/2014 - 10/2015] or REGISTRATION [10/2015 - ] ).
  • It is necessary to perform initialization (Refer to INITIALIZATION [09/2014 - 10/2015] or INITIALIZATION [10/2015 - ] ) after registration (Refer to REGISTRATION [09/2014 - 10/2015] or REGISTRATION [10/2015 - ] ) of the transmitter IDs into the door control receiver if the door control receiver has been replaced.*
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