DTC C1984: Brake Maintenance Mode

DTC Detecting condition:

This malfunction is stored when the brake maintenance mode is in progress.

Trouble symptom:

Parking brake system does not operate.

NOTE: When any other DTC is detected, start the diagnosis with the DTC.

CHECK ELECTRONIC PARKING MODE.
Is the brake maintenance mode in progress?

Yes: Currently, it is normal. Although DTC C1984 is input during the brake maintenance mode, it is normal. Ref. to PARKING BRAKE>PARKING BRAKE SYSTEM>OPERATION>BRAKE MAINTENANCE MODE .

No: Go to 2.
CHECK OPERATION OF ELECTRONIC PARKING BRAKE.
1. Using the Subaru Select Monitor, perform the clear memory. Ref. to COMMON (DIAG)>CLEAR MEMORY .
2. Apply the electronic parking brake several times.
3. Read the DTC using Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
  Is DTC stored even though the electronic parking brake does not operate or the electronic parking brake operates?
  
  Yes: Replace the VDC Control Module & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDC Control Module & H/U) .
  
  No: Go to 3.
CHECK DETECTION OF OTHER DTCS FOR VDC.
Read the DTC using Subaru Select Monitor. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

Is any other DTC displayed?

Yes: Perform the diagnosis according to DTC. Ref. to BRAKE CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

Perform the diagnosis from step 1 again, and if the same DTC is stored, replace the VDC Control Module & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDC Control Module & H/U) .

No: Currently, it is normal. There may have been a temporary poor contact in the harness and connector or a temporary noise interference.