Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Left Electric Parking Brake Actuator Signal Stuck In Range (C060E2A)

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Brake / Parking Brake / Electric Parking Brake System / Left Electric Parking Brake Actuator Signal Stuck In Range (C060E2A)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C060E2A

Left Electric Parking Brake Actuator Signal Stuck In Range
  • Diagnosis Condition:

    Electric parking brake operating

  • Malfunction Status:

    Motor locked, gear locked, free spinning

  • Detection Time:

    -
  • Parking brake actuator assembly LH
  • No. 2 parking brake wire assembly
  • Wire harness or connector
  • Rear brake LH

DTC stored

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

Vehicle Condition

Pattern 1

Pattern 2

Pattern 3

Diagnosis Condition

Electric parking brake operating

○

○

○

Malfunction Status

Motor lock detected

○

-

-

Gear lock detected

-

○

-

Free spinning detected

-

-

○

Detection Time

-

-

-

Number of Trips

1 trip

1 trip

1 trip

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • Although DTC C060E2A may be stored after entering pad replacement mode, this is not a malfunction.
  • Although DTC C060E2A may be stored after forcibly releasing the parking brake, this is not a malfunction.
  • 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 (red) blinks when the engine switch is first turned on (IG).

PROCEDURE

1.

CHECK DTC

(a) Using the Techstream, check for DTCs other than DTC C060E2A.

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

Only DTC C060E2A is output

A

DTCs other than C060E2A are output

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

2.

INSPECT NO. 2 PARKING BRAKE WIRE ASSEMBLY

(a) Turn the engine switch off.

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

OK:

The connector is securely connected.

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

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

OK:

No deformation or corrosion.

(e) 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

3.

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

(a) Turn the engine switch off.

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

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

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

(e) 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

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

Always

Below 1 Ω

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

Always

10 kΩ or higher

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

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

INSPECT REAR BRAKE AND PARKING BRAKE ACTUATOR ASSEMBLY LH (CHECK FOR ROTATING PARTS THAT ARE STUCK AND FOR FREE SPINNING ACTUATORS)

(a) Enter rear brake pad replacement mode.

Click here

(b) Turn the engine switch off.

(c) Check that the rotating parts are not seized or the actuator is not spinning freely.

(1) Check that the parking brake actuator assembly LH is installed properly to the rear brake caliper and that it is not spinning freely.

For the parking brake actuator assembly LH removal procedure: Click here

(2) Check that there is no damage to the rotating parts from the parking brake actuator assembly LH to the rear brake caliper.

(3) Inspect the parking brake actuator assembly LH and check that it operates correctly.

Click here

(4) Check that the rear brake caliper threaded part rotates and that the rear disc brake piston moves outward.

HINT:

For the check procedures, refer to the parking brake forced release method when not using the Techstream.

Click here

HINT:

Return to normal mode after work is complete.

Click here

Result

Proceed to

Parking brake actuator assembly LH is malfunctioning

A

Other than parking brake actuator assembly LH is malfunctioning

B
A

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY LH

B

REPAIR OR REPLACE ABNORMAL PARTS
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