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.

1. 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.

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 operates?

   Yes  : Replace the VDCCM & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & H/U) .

   No  : Go to  3.

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 VDCCM & H/U. Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM & 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.