System Block Diagram
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
The central gateway control module is connected to all CAN communication modules and no data receiving is detected from any module.
When the central gateway control module malfunctions, communication between buses is cut off, causing the no-receive DTC to occur at each control unit.
 Courtesy of SUBARU OF AMERICA, INC.
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