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Home >> Subaru >> 2016 >> BRZ Series.HyperBlue >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Entry Start System Start System (Keyless Start)) >> Entry & Start System (Start Function) >> DTC B2277 [Submerging Circuit Abnormal] >> Circuit description

Circuit description

WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.

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 A PROBLEM IS 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.
RELATED [CURRENT DATA DISPLAY & SAVE] AND [SYSTEM OPERATION CHECK MODE] ITEMS

DTC No. [Current Data Display & Save] items [System Operation Check Mode] items
B2277 - -
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