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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 C1B0E Solenoid Valve Main Relay Circuit Low >> General Description >> Diagnostic Method

Diagnostic Method

Either of the following is detected:

  1. When the ignition switch is on (READY): The solenoid power supply voltage is less than 3.5 V, when the IG1 terminal voltage is 9.54 V or more and operation of the main relay is requested.
  2. When the ignition switch is off: The solenoid power supply voltage is less than 3.5 V, when operation of the main relay is requested.
JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
Case 1 
Solenoid power supply voltage
Less than 3.5 V
Case 2 
Solenoid power supply voltage
Less than 3.5 V
Case 3 
Solenoid power supply voltage
Less than 3.5 V

Time needed for diagnosis: 

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