DTC C0609-62: Electric Parking Brake Switch Signal Compare Failure [12/2019 - 11/2023]: Procedure

1. Remove the electric parking brake switch (electric parking brake switch assembly).

   Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - ]

2. Inspect the electric parking brake switch (electric parking brake switch assembly).

   Refer to INSPECTION [12/2019 - 10/2022] , or refer to INSPECTION [10/2022 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ELECTRIC PARKING BRAKE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY). Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - ] 

Result: 

OK 

See step  2

1. Disconnect the P2 electric parking brake switch (electric parking brake switch assembly) connector.
2. Disconnect the A57 No. 2 skid control ECU (brake actuator assembly) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A57-36 (SWI1) - P2-7 (SWI1)	Always	Below 1 Ω
   A57-31 (SWO1) - P2-8 (SWO1)	Always	Below 1 Ω
   A57-41 (SWI2) - P2-1 (SWI2)	Always	Below 1 Ω
   A57-39 (SWO2) - P2-2 (SWO2)	Always	Below 1 Ω
   A57-36 (SWI1) or P2-7 (SWI1) - Body ground	Always	10 kΩ or higher
   A57-31 (SWO1) or P2-8 (SWO1) - Body ground	Always	10 kΩ or higher
   A57-41 (SWI2) or P2-1 (SWI2) - Body ground	Always	10 kΩ or higher
   A57-39 (SWO2) or P2-2 (SWO2) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Clear the DTCs.

   Chassis > Brake/EPB > Clear DTCs 

2. Turn the ignition switch off.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Check for DTCs.

   Chassis > Brake/EPB > Trouble Codes 

   Result

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

Result: 

A 

REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023] 

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]