Electric Parking Brake System AUTO Function Circuit [04/2020 - 09/2022]: Procedure

1. Check for DTCs.

   Chassis > ABS/VSC/TRC > Trouble Codes 

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

Result: 

B 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART [04/2020 - 09/2022] 

Result: 

A 

See step  2

1. Check for DTCs.

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

Result: 

A 

REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [01/2019 - 09/2022] 

Result: 

B 

GO TO HYBRID CONTROL SYSTEM 

for Nickel Metal Hydride Battery: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2019 - 09/2022]

for Lithium-ion Battery: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [04/2020 - 09/2022]