Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Left Electric Parking Brake Actuator Control Circuit Short to Ground or Open (C060B14)

Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual / Brake / Parking Brake / Electric Parking Brake System / Left Electric Parking Brake Actuator Control Circuit Short to Ground or Open (C060B14)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C060B14

Left Electric Parking Brake Actuator Control Circuit Short to Ground or Open

  • Diagnosis Condition:

    Engine switch on (IG)

  • Malfunction Status:

    When the ECU power supply is normal, a malfunction in the electric parking brake actuator LH internal circuit is detected.

  • Detection Time:

    Approximately 1 second

  • Parking brake actuator assembly LH
  • No. 2 parking brake wire assembly
  • Wire harness and connector
  • Skid control ECU (brake actuator assembly)

DTC stored

An electric parking brake system malfunction is displayed on the multi-information display.

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • The electric parking brake may still operate up to 20 seconds after the engine switch is turned off. Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more.
  • After replacing the skid control ECU (brake actuator assembly), perform "Calibration".

    Click here

  • When replacing the skid control ECU (brake actuator assembly), operate the electric parking brake switch (electric parking brake switch assembly) as the parking brake indicator light blinks (red) when the engine switch is first turned on (IG).

PROCEDURE

1.

INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

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

OK:

The connector is securely connected.

(b) Disconnect the oS1 and o2 No. 2 parking brake wire assembly connectors.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) 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

oS1-1 - o2-2 (MRL+)

Always

Below 1 Ω

oS1-1 or o2-2 (MRL+) - Body ground and other terminals

Always

10 kΩ or higher

oS1-2 - o2-1 (MRL-)

Always

Below 1 Ω

oS1-2 or o2-1 (MRL-) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPLACE NO. 2 PARKING BRAKE WIRE ASSEMBLY

OK

2.

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - PARKING BRAKE ACTUATOR ASSEMBLY LH)

(a) Make sure the No. 2 parking brake wire assembly is securely installed.

(b) Disconnect the A41 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the o2 parking brake actuator assembly LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A41-3 (MRL+) - o2-2 (MRL+)

Always

Below 1 Ω

A41-3 (MRL+) or o2-2 (MRL+) - Body ground

Always

10 kΩ or higher

A41-2 (MRL-) - o2-1 (MRL-)

Always

Below 1 Ω

A41-2 (MRL-) or o2-1 (MRL-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT PARKING BRAKE ACTUATOR ASSEMBLY LH

(a) Remove the parking brake actuator assembly LH.

Click here

(b) Inspect the parking brake actuator assembly LH.

Click here

OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH

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