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Home >> Lexus >> 2016 >> GS 450h Base >> Repair and Diagnosis >> Electrical >> Starter >> Smart Access System With Push-Button Start (For Start Function) (Diagnostic Codes & Symptom Tests) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function) >> DTC B2277: Detecting Vehicle Submersion [09/2014 - ] >> Caution / Notice / Hint
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Caution / Notice / Hint

NOTE:
  • 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.

  • The smart access system with push-button start (for Start 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 Start Function) after confirming that the communication systems are functioning properly.
  • Before replacing the power management control ECU, refer to the smart access system with push-button start (for Start Function) precaution (PRECAUTION [09/2014 - ] ).
  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

HINT: 

Before proceeding with troubleshooting, check if there are any signs of water damage to the power management control ECU. If there are any signs of water damage, replace the power management control ECU and take measures against the cause of the water damage.

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