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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 P0573 Brake Switch "A" Circuit High >> General Description >> Diagnostic Method

Diagnostic Method

Brake light SW input voltage is 4.25 V or more when decelerating vehicle from 18.68 MPH or more to 1.87 MPH.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
(Brake Light SW Input Voltage 4.25 V or more
Followed by
The Fastest Wheel Speed of LF/RF/LR/RR (Accelerating))
18.68 MPH or more
(Brake Light SW Input Voltage 4.25 V or more
Followed by
The Fastest Wheel Speed of LF/RF/LR/RR (Decelerating))
1.87 MPH or less
 
NOTE: After the Fastest Wheel Speed of LF/RF/LR/RR Accelerating: 18.68 MPH or more
 

Time needed for diagnosis:  10 times

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