DTC C13A1: Short circuit in Power source circuit [02/2019 - 12/2021]: Procedure

1. Turn the ignition switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Disconnect the parking brake ECU assembly connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   M35-5 (IG) - Body ground	Ignition switch off	Below 2.5 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  2

1. Remove the electric parking brake switch (integration control and panel assembly).

   Refer to REMOVAL [11/2018 - ]

2. Inspect the electric parking brake switch (integration control and panel assembly).

   Refer to INSPECTION [11/2018 - 12/2021]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE ELECTRIC PARKING BRAKE SWITCH (INTEGRATION CONTROL AND PANEL ASSEMBLY). Refer to  REMOVAL [11/2018 - ] 

Result: 

OK 

See step  3

1. Disconnect the G32 electric parking brake switch (integration control and panel assembly) connector.
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 resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M35-20 (LCK1) - Body ground	Always	10 kΩ or higher
   M35-15 (LCK2) - Body ground	Always	10 kΩ or higher
   M35-16 (REL2) - Body ground	Always	10 kΩ or higher
   M35-19 (REL1) - Body ground	Always	10 kΩ or higher

   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