LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2016 >> BRZ Series.HyperBlue >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnostics - System & Circuit Checks >> VC Power Supply Circuit >> Circuit description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit description

The engine control computer constantly produces 5 V from the battery voltage applied to +B terminal and +B2 terminal to operate the CPU. In addition, the engine control computer supplies this power to the sensor via VC output circuit.

Fig 1: VC Power Supply System Diagram
G10212972Courtesy of SUBARU OF AMERICA, INC.

When the VC circuit is shorted, the power is not supplied from the VC circuit. Because of this, the CPU in the engine control computer and the sensors supplied from the VC circuit are de-energized. In this state, the system is not started, and the MIL does not illuminate even if the system malfunction occurs.

NOTE: Normally, when the ignition switch is turned to ON for the first time, the MIL illuminates. When the engine has started, the MIL goes off.