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Home >> Subaru >> 2020 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 88 (Power Control System) >> Power Control System >> DTC B1011: BATT Power Supply (Control) Malfunction >> Circuit description
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Circuit description

WARNING: This page is about a different car, the 2019 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.

B1011 is output when a BMPX circuit malfunction is detected.

NOTE: If B1012 is output at the same time, there are some cases where all functions of the main body ECM (Network gateway computer) do not operate.
Diagnostic codes Detecting conditions Faulty part
B1011 The BMPX voltage is 8.3 V or less, or 16.7 V or more (BMPX circuit malfunction)
  • Main body ECM (Network gateway computer)
  • Instrument panel junction block ASSY
  • Wiring harness or connector