DTC C060B-14: Left Electric Parking Brake Actuator Control Circuit Short to Ground or Open [12/2019 - ]: Procedure

1. Make sure that there is no looseness at the locking part and the connecting part of the connectors.

   OK

   The connector is securely connected.

2. Disconnect the uM2 and u2 No. 2 parking brake wire assembly connectors.
3. Check both the connector case and the terminals for deformation and corrosion.

   OK

   No deformation or corrosion.

4. 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
   uM2-1 - u2-2 (+)	Always	Below 1 Ω
   uM2-1 or u2-2 (+) - Body ground and other terminals	Always	10 kΩ or higher
   uM2-2 - u2-1 (-)	Always	Below 1 Ω
   uM2-2 or u2-1 (-) - Body ground and 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. Make sure the No. 2 parking brake wire assembly is securely installed.
2. Disconnect the A39 skid control ECU (brake actuator assembly) connector.
3. Disconnect the u2 parking brake actuator assembly LH connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A39-3 (MRL+) - u2-2 (+)	Always	Below 1 Ω
   A39-3 (MRL+) or u2-2 (+) - Body ground	Always	10 kΩ or higher
   A39-2 (MRL-) - u2-1 (-)	Always	Below 1 Ω
   A39-2 (MRL-) or u2-1 (-) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Remove the parking brake actuator assembly LH.

   Refer to REMOVAL [12/2019 - ]

2. Inspect the parking brake actuator assembly LH.

   Refer to INSPECTION [12/2019 - ]

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to  REMOVAL [12/2019 - 10/2022]  , or refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH. Refer to  REMOVAL [12/2019 - ]