DTC C1B2C Solenoid Valve 2 Range/Performance: Notes

1. - 

DTC detecting condition: 

• DTC C1B2C (detail code: 35)

  When there is difference in electric current monitor cross check values inside IC.

• DTC C1B2D (detail code: 32, 36)

  Solenoid valve 2 open circuit• Undercurrent state

• DTC C1B2E (detail code: 31, 33, 34)

  Solenoid valve 2 circuit shorted•Overcurrent (low voltage state) electric current leaking state

Trouble symptom: 

• Brake cannot be controlled.
• Regenerative brake cannot be controlled.
• Brake assist does not operate.
• EyeSight functions (ACC/PCS) do not operate.

1. CHECK DTC  .
   1. Using the Subaru Select Monitor, perform the clear memory of [Electric Brake Booster]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
   2. Read the DTC of [Electric Brake Booster] using the Subaru Select Monitor. Ref. to ELECTRIC BRAKE BOOSTER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   If DTCs C1B2C, C1B2D, C1B2E are not displayed, go to  A.

   If DTCs C1B2E (detail code: 33), C1C2E (detail code: 01) are displayed, go to  B.

   If DTCs C1B2C, C1B2D, C1B2E are displayed, go to  C.

   1. Currently, it is normal. Temporary interference from noise is a possible cause.
   2. Perform the diagnosis according to DTC C1C2E. Ref. to ELECTRIC BRAKE BOOSTER (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC C1C2E SOLENOID VALVE SUPPLY VOLTAGE LOW .
   3. Replace the brake booster assembly (with the master cylinder). Ref. to BRAKE>BRAKE BOOSTER .