DTC C13AD: Open in +B Circuit [02/2019 - 12/2021]: Procedure

1. Turn the ignition switch off.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch to ON and the Techstream on.
4. Enter the following menus: Chassis / Electric Parking Brake / Data List.
5. Check the Data List.

   Chassis > Electric Parking Brake > Data List 

   Tester Display	Measurement Item	Range	Normal Condition
   RH Motor +B Voltage	Parking brake motor RH (parking brake actuator assembly RH) +B voltage display	Lo, Mid, Error or Hi	Hi
   LH Motor +B Voltage	Parking brake motor LH (parking brake actuator assembly LH) +B voltage display	Lo, Mid, Error or Hi	Hi

   Chassis > Electric Parking Brake > Data List 

   Tester Display
   RH Motor +B Voltage
   LH Motor +B Voltage

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

Result: 

NG 

See step  2

1. Turn the ignition switch off.
2. Disconnect the parking brake ECU assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Parking Brake ECU Assembly)

3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   M36-7 (+B) - Body ground	Always	11 to 14 V
   M36-12 (+B2) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE PARKING BRAKE ECU ASSEMBLY. Refer to  REMOVAL [02/2019 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2020]  , or refer to  REMOVAL [08/2020 - 12/2021] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR