DTC C060B-13: Left Electric Parking Brake Actuator Control Circuit Open [09/2020 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 2024 Lexus IS 500, 2024 Lexus IS 350, 2024 Lexus IS 300, 2023 Lexus IS 500, and 2023 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY
- Turn the engine switch off.
- Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK
The connector is securely connected.
- Disconnect the tQ1 and t1 No. 2 parking brake wire assembly connectors.
- Check both the connector case and the terminals for deformation and corrosion.
OK
No deformation or corrosion.
- Measure the resistance according to the value(s) in the table below.
*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 tQ1-2 - t1-2 (MRL+) Always Below 1 Ω tQ1-2 - Other terminals Always 10 kΩ or higher tQ1-1 - t1-1 (MRL-) Always Below 1 Ω tQ1-1 - 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
- CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - PARKING BRAKE ACTUATOR ASSEMBLY LH)
- Turn the engine switch off.
- Make sure the No. 2 parking brake wire assembly is securely installed.
- Disconnect the A111 skid control ECU (brake actuator assembly) connector.
- Disconnect the t1 parking brake actuator assembly LH connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A111-3 (MRL+) - t1-2 (MRL+) Always Below 1 Ω A111-2 (MRL-) - t1-1 (MRL-) Always Below 1 Ω Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- INSPECT PARKING BRAKE ACTUATOR ASSEMBLY LH
- Remove the parking brake actuator assembly LH.
Refer to REMOVAL [09/2020 - ]
- Inspect the parking brake actuator assembly LH.
Refer to INSPECTION [09/2020 - ]
Result
Proceed to OK NG
Result:
OK
REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY). Refer to REMOVAL [09/2020 - 11/2021] , or refer to REMOVAL [11/2021 - ]
Result:
NG
REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH. Refer to REMOVAL [09/2020 - ]
- Remove the parking brake actuator assembly LH.