DTC C13A9: Brake System Malfunction [06/2018 - 07/2019]: Procedure

1. Check for DTCs.

   Chassis > ABS/VSC/TRC > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are not output	A
   DTCs are output	B

Result: 

B 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2018 - 07/2019] 

Result: 

A 

See step  2

1. Clear the DTCs.

   Chassis > Electric Parking Brake > Clear DTCs 

2. Turn the power switch off.
3. Check for DTCs.

   Chassis > Electric Parking Brake > Trouble Codes 

   Result

   Result	Proceed to
   DTCs are output	A
   DTCs are not output	B

Result: 

A 

REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [06/2018 - 08/2021] 

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]