DTC C13A3: Open or Short Circuit in Lock Switch Circuit; DTC C13AB: Lock Switch Circuit Comparison [10/2020 - 10/2023]: Procedure

1. Inspect the electric parking brake switch assembly.

   Refer to INSPECTION [10/2020 - 10/2023]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ELECTRIC PARKING BRAKE SWITCH ASSEMBLY. Refer to  REMOVAL [10/2017 - ] 

Result: 

OK 

See step  2

1. Turn the power switch off.
2. Disconnect the G43 electric parking brake switch assembly connector.
3. Disconnect the L77 parking brake ECU assembly connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L77-12 (LCK1) - G43-1 (LOK1)	Always	Below 5 Ω
   L77-15 (LCK2) - G43-2 (LOK2)	Always	Below 5 Ω
   L77-12 (LCK1) or G43-1 (LOK1) - Body ground	Always	10 kΩ or higher
   L77-15 (LCK2) or G43-2 (LOK2) - Body ground	Always	10 kΩ or higher
   G43-14 (GND1) - Body ground	Always	Below 5 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

   Chassis > Electric Parking Brake > Clear DTCs 

2. Turn the power switch off.
3. Turn the power switch on (IG).
4. Perform a lock operation with the electric parking brake switch assembly.

   HINT: 

   When the electric parking brake switch assembly is pushed and held for 1 second or more without being pushed fully to the lock side, one of the 2 linked contacts may turn on while the other one turns off causing this DTC to be stored.

5. Check for DTCs.

   Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

   Chassis > Electric Parking Brake > Trouble Codes 

   Result

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

Result: 

A 

REPLACE PARKING BRAKE ECU ASSEMBLY. Refer to  REMOVAL [10/2020 - 11/2021]  , or refer to  REMOVAL [11/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023] 

Result: 

B 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023]