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Home >> Toyota >> 2012 >> Prius Two >> Repair and Diagnosis (Single Page) >> External Pages >> Different variant/trim >> Section 119 (Smart Key System (For Entry Function) (Plug-In) (Diagnostic Codes & Symptom Tests)) >> SMART KEY SYSTEM (for Entry Function) >> DTC B27A1: Open in Driver Side Electrical Antenna Circuit >> Description
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DTC B27A1: Open in Driver Side Electrical Antenna Circuit: Description

WARNING: This page is about a different variant/trim than selected.

The certification ECU (smart key ECU assembly) generates a request signal and sends it to the electrical key oscillator built into the front door outside handle assembly (for driver side) at 0.25-second intervals. To detect a key near the driver door, the front door outside handle assembly (for driver side) creates a detection area with a radius of approximately 1.0 m (3.28 ft.) from the driver door at 0.25-second intervals.

DTC B27A1 is detected by the certification ECU (smart key ECU assembly) if an open circuit is detected between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver side) terminals (between CLG1 and ANT1, or CG1B and ANT2).

DTC No. DTC Detection Condition Trouble Area
B27A1 Open circuit detected between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver side) terminals (between CLG1 and ANT1, or CG1B and ANT2).
  • Front door outside handle assembly (for driver side)
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector