Electric Parking Brake System AUTO Function Circuit [01/2019 - 09/2022]: Procedure

1. Check the vehicle specification.

   Result

   Result	Proceed to
   for M/T	A
   for CVT	B

Result: 

B 

See step  3

Result: 

A 

See step  2

1. Disconnect the A51 skid control ECU (brake actuator assembly) connector.
2. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A51-36 (IG1) - Body ground	Engine switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

Refer to REMOVAL [01/2019 - 03/2019] , or refer to REMOVAL [03/2019 - 09/2022]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Check for DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

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

Result: 

A 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) 

Refer to REMOVAL [01/2019 - 03/2019] , or refer to REMOVAL [03/2019 - 09/2022]

Result: 

B 

GO TO SFI SYSTEM 

for M20A-FKS: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

for 2ZR-FAE: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [01/2019 - 11/2022]