LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2018 >> ES 350 >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Smart Access System (For Start Function) (Diagnostic Codes & Symptom Tests) >> Smart Access System With Push-Button Start (For Start Function) >> DTC B2277: Detecting Vehicle Submersion (07/2015 -) >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B2277: Detecting Vehicle Submersion (07/2015 -): Description

This DTC is stored when a malfunction in the water submersion detection circuit in the certification ECU (smart key ECU assembly) is detected.

HINT: 

When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code DTC Detection Condition Trouble Area DTC Output Confirmation Operation
B2277 The water submersion detection circuit in the certification ECU (smart key ECU assembly) detects water submersion (1-trip detection logic*).
  • Submersion of certification ECU (smart key ECU assembly) in water
  • Certification ECU (smart key ECU assembly)
Wait 300 seconds after connecting the cable to the negative (-) battery terminal.
VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED

Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
The engine switch cannot be turned off and the engine cannot be started. -