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.