Electric Parking Brake System AUTO Function Circuit [08/2021 - ]: Procedure

1. Check for DTCs.

   Chassis > ABS/VSC/TRAC > 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 [08/2021 - ] 

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 [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

B 

GO TO HYBRID CONTROL SYSTEM 

For NICKEL METAL HYDRIDE BATTERY: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

For LITHIUM-ION BATTERY: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ]