DTC C060B-13: Left Electric Parking Brake Actuator Control Circuit Open [12/2021 - ]: Procedure

1. Turn the ignition 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 NN12 and N57 No. 2 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. 2 Parking Brake Wire Assembly	*b	(to wire harness connector)
   *c	(to Parking Brake Actuator Assembly LH)	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   NN12-1 - N57-2 (+)	Always	Below 1 Ω
   NN12-1 or N57-2 (+) - Other terminals	Always	10 kΩ or higher
   NN12-2 - N57-1 (-)	Always	Below 1 Ω
   NN12-2 or N57-1 (-) - Other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY 

Result: 

OK 

See step  2

1. Turn the ignition switch off.
2. Make sure the No. 2 parking brake wire assembly is securely installed.
3. Disconnect the A105 No. 2 skid control ECU (brake actuator assembly) connector.
4. Disconnect the N57 parking brake actuator assembly LH connector.
5. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A105-3 (MRL+) - N57-2 (+)	Always	Below 1 Ω
   A105-2 (MRL-) - N57-1 (-)	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 [11/2018 - ]

Result

Result: 

OK 

REPLACE NO. 2 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [12/2021 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]  , or refer to  REMOVAL [10/2023 - ] 

Result: 

NG 

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH. Refer to  REMOVAL [11/2018 - ]