Electric Parking Brake does not Operate [02/2019 - 12/2021]: Procedure

1. Turn the ignition switch to ON (READY) and move the shift lever to D. Then depress the brake pedal and pull the electric parking brake switch (integration control and panel assembly) to the lock side for 1 second. Check the parking brake indicator light condition.
2. Release the brake pedal and check that the vehicle does not move.
3. Depress the brake pedal and push the electric parking brake switch (integration control and panel assembly) to the release side for 1 second. Check the parking brake indicator light condition.
4. Release the brake pedal and check that the vehicle moves.

   Result

   Result	Proceed to
   Lock and release control is normal; parking brake indicator light is off or is blinking	A
   Lock and release control is malfunctioning; parking brake indicator light is illuminated or off depending on switch operation	B
   Lock and release control is malfunctioning; parking brake indicator light is off or is blinking	C

Result: 

B 

INSPECT REAR BRAKE 

Result: 

C 

See step  3

Result: 

A 

See step  2

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 / Active Test.
5. Check the condition of the parking brake indicator light by operating the Techstream.

   Chassis > Electric Parking Brake > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   PKB Light	Parking brake indicator light	ON or OFF	Vehicle stopped Ignition switch ON

   Chassis > Electric Parking Brake > Active Test 

   Tester Display
   PKB Light

   OK

   Indicator light turns on when operating the Techstream.

   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 

GO TO METER / GAUGE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ] 

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
   M35-3 (BECU) - Body ground	Always	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

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	Switch Condition	Specified Condition
   M35-5 (IG) - Body ground	Ignition switch ON	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