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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 C1A1E Brake Fluid Pressure Sensor 2 Invalid Data >> General Description >> Diagnostic Method

Diagnostic Method

Case 1, Case 2, Case 3, Case 4 

Data from the sensor is invalid.

Case 5 

ECU internal malfunction.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Case 1 
Power Supply for Accumulator Pressure Sensor
Less than 6.3 V
or
Exceeds 7.64 V
Case 2 
Accumulator pressure
Exceeds 23.3 MPa
The Temperature Value of Accumulator Pressure Sensor Exceeds 150°C
Case 3 
Lost communication with accumulator pressure sensor
Detected
Case 4 
ABS (Current Accumulator Pressure - Last Accumulator Pressure)
Exceeds 7.5 MPa
Case 5 
(Accumulator Pressure Sensor IC Reset
Met
for Time) 0.1 seconds or less

Time needed for diagnosis: 

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