DTC C0610-13: Right Electric Parking Brake Actuator Control Circuit Open [08/2021 -]: Procedure

1. Turn the power switch off.
2. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

   OK

   The connector is securely connected.

3. Disconnect the YK1 and Y4 No. 1 parking brake wire assembly connectors.
4. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

5. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of No. 1 Parking Brake Wire Assembly	*b	(to wire harness connector)
   *c	(to Parking Brake Actuator Assembly RH)	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   YK1-2 - Y4-2 (RE+)	Always	Below 1 Ω
   YK1-2 - Other terminals	Always	10 kΩ or higher
   YK1-1 - Y4-1 (RE-)	Always	Below 1 Ω
   YK1-1 - Other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY 

Result: 

OK 

See step  2

1. Turn the power switch off.
2. Make sure the No. 1 parking brake wire assembly is securely installed.
3. Disconnect the A39 parking brake ECU (brake actuator assembly) connector.
4. Disconnect the Y4 parking brake actuator assembly RH connector.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A39-4 (MRR+) - Y4-2 (RE+)	Always	Below 1 Ω
   A39-3 (MRR-) - Y4-1 (RE-)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

Refer to INSPECTION [04/2018 -]

Result

Result: 

OK 

REPLACE PARKING BRAKE ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [08/2021 -] 

Result: 

NG 

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY RH. Refer to  REMOVAL [04/2018 -]