Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Electric Parking Brake Switch Signal Compare Failure (C060962)

Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual / Brake / Parking Brake / Electric Parking Brake System / Electric Parking Brake Switch Signal Compare Failure (C060962)

DESCRIPTION

When the electric parking brake switch is pulled, a lock request signal is sent from the skid control ECU (brake actuator assembly) to the parking brake actuator assembly. When the electric parking brake switch is pushed, a release request signal is sent from the skid control ECU (brake actuator assembly) to the parking brake actuator assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C060962

Electric Parking Brake Switch Signal Compare Failure
  • Parking brake switch open or short circuit is detected for 1 seconds or more
  • Parking brake switch stuck malfunction
  • Electric parking brake switch (electric parking brake switch assembly)
  • Wire harness or connector
  • Skid control ECU (brake actuator assembly)

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

-

-

-

-

Malfunction Status

Parking brake switch open circuit is detected

○

-

-

Parking brake switch short circuit is detected

-

○

-

Parking brake switch stuck malfunction

-

-

○

Detection Time

1 second or more

1 second or more

-

Number of Trips

1 trip

1 trip

1 trip

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the electric parking brake switch is held near the lock position but not fully in the lock position for 1 second or more, a DTC may be stored due to one of the two contacts being ON while the other is OFF. (This is not a system 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.

INSPECT ELECTRIC PARKING BRAKE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)

(a) Remove the electric parking brake switch (electric parking brake switch assembly).

Click here

(b) Inspect the electric parking brake switch (electric parking brake switch assembly).

Click here

NG

REPLACE ELECTRIC PARKING BRAKE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)

OK

2.

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

(a) Disconnect the J163 electric parking brake switch (electric parking brake switch assembly) connector.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A41-36 (SWI1) - J163-10 (SWI1)

Always

Below 1 Ω

A41-31 (SWO1) - J163-11 (SWO1)

Always

Below 1 Ω

A41-41 (SWI2) - J163-2 (SWI2)

Always

Below 1 Ω

A41-39 (SWO2) - J163-3 (SWO2)

Always

Below 1 Ω

A41-36 (SWI1) or J163-10 (SWI1) - Body ground

Always

10 kΩ or higher

A41-31 (SWO1) or J163-11 (SWO1) - Body ground

Always

10 kΩ or higher

A41-41 (SWI2) or J163-2 (SWI2) - Body ground

Always

10 kΩ or higher

A41-39 (SWO2) or J163-3 (SWO2) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the engine switch off.

NEXT

4.

CHECK DTC

(a) Check for DTCs.

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

DTCs are output

A

DTCs are not output

B
A

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

B

USE SIMULATION METHOD TO CHECK

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