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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 C1B4F Solenoid Valve 4 Stuck >> General Description >> Diagnostic Method

Diagnostic Method

Separation lock valve malfunction (stuck, etc.)

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Case 1 
(Reaction pressure decrease
0.03 MPa or more
for Time) 6.00 sec or more
((Reaction pressure 0.2 MPa or more
Followed by
(Reaction pressure decrease
0.03 MPa or more
for Time)) 6.00 sec or more
Case 2 
(Reaction pressure
Less than -0.6 MPa
for Time) 6.00 sec or more
((Reaction pressure 0.2 MPa or more
Followed by
(Reaction pressure
Less than -0.6 MPa
for Time)) 6.00 sec or more

Time needed for diagnosis:  1.5 s

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