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Home >> Subaru >> 2018 >> BRZ Limited, Standard Trans >> Repair and Diagnosis >> Electrical >> Starter >> Entry Start System Start System (Keyless Start) >> Entry & Start System (Start Function) >> DTC B2277: Submerging Circuit Abnormal >> Circuit description
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Circuit description

This DTC is output when a problem is detected in the water-exposure detection circuit of the smart key ECM ASSY (collation ECM).

DTC No. DTC detection status Faulty part DTC Output Confirmation Operation
B2277 The water-exposure detection circuit of the collation ECM (smart key ECM ASSY) detects exposure to water (1-trip detection logic(1)).  
  • Water-exposure of the collation ECM (smart key ECM ASSY)
  • Collation ECM (smart key ECM ASSY)
 After connecting the battery cable, wait 300 seconds.
(1) The code is output only when the problem is found and the engine switch is on (IG).
VEHICLE STATUS AND FAILSAFE FUNCTION WHEN PROBLEM DETECTED

Vehicle status when a problem is detected Failsafe function when a problem is detected
Cannot turn off or start the engine. Changing the power mode to on (IG) and driving the starter relay is prohibited.
DIAGNOSTIC TROUBLE CODE DESCRIPTION - RELATED (DATA MONITOR) AND (ACTIVE TEST)

DTC No. [Data monitor] item [Active Test] item
B2277 - -
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