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Home >> Subaru >> 2019 >> WRX Base >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Brake Vacuum Control (BVC) (Diagnostics) >> Engine Control Module (ECM) I/O Signal >> Electrical Specification

Electrical Specification

G09483593Courtesy of SUBARU OF AMERICA, INC.
Description Connect or No. Terminal No. Signal (V) Note
Ignition SW ON (Engine OFF) Engine ON (Idling)
Brake booster pressure sensor Signal E158 13 1 - 3.8 1 - 3.8 -
Power supply B134 18 5 5 -
Ground B134 19 0 0 -
Self-shutoff control B134 38 0 0 -
Brake vacuum pump Relay drive E158 37 10 - 13 (When pump is OFF) 12 - 14 (When pump is ON) -
0 (When pump is ON) 0 (When pump is ON)
Electric load E158 1 0 (When pump is OFF) 0 (When pump is OFF) -
10 - 13 (When pump is ON) 12 - 14 (When pump is ON)