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Home >> Subaru >> 2021 >> Crosstrek Limited >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Electric Brake Booster System (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC C0594 Brake Booster Motor "A" Performance >> General Description >> Diagnostic Method

Diagnostic Method

The pump motor is operating continuously for 178 seconds or more. (When the relay is malfunctioning for 98 seconds or more.)

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Case 1 
Brake Booster Motor Voltage
More than 6 V
Case 2 
Brake Booster Motor Voltage
More than 6 V

Time needed for diagnosis: 

Malfunction indicator light illumination:  Illuminates as soon as a malfunction occurs.