Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Brake Pedal Switch "A" Circuit Open (C004013)

DESCRIPTION

The brake pedal load sensing switch signal turns on when the brake pedal is depressed with a force exceeding a predetermined level.

The skid control ECU (brake actuator assembly) uses this circuit to detect if the brake pedal is depressed or not.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C004013

Brake Pedal Switch "A" Circuit Open

When the +BS terminal voltage is from 9.5 to 17.4 V, an open or short in the brake pedal load sensing switch continues for 0.3 seconds or more.

  • Brake pedal load sensing switch (brake pedal support assembly)
  • Wire harness and connector
  • Skid control ECU (brake actuator assembly)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake actuator assembly), perform "Calibration".

Click here

PROCEDURE

1.

READ VALUE USING TECHSTREAM (BRAKE PEDAL LOAD SENSING SW)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Select the Data List using the Techstream.

Click here

Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Brake Pedal Load Sensing SW

Brake pedal load sensing switch

OFF / ON

OFF: Brake pedal released

ON: Brake pedal depressed

-

Chassis > Brake/EPB > Data List

Tester Display

Brake Pedal Load Sensing SW

(d) Check that the brake pedal load sensing switch display observed on the Techstream changes according to brake pedal operation.

OK:

The Techstream displays OFF / ON according to brake pedal operation.

NG

GO TO STEP 4

OK

2.

CLEAR DTC

(a) Operate the Techstream to clear the codes. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

Chassis > Brake/EPB > Clear DTCs

(b) Press the DTC clear button.

(c) Turn the engine switch off.

NEXT

3.

RECONFIRM DTC

(a) Start the engine.

(b) Perform a road test.

(c) Read the DTCs following the prompts on the Techstream. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

Chassis > Brake/EPB > Trouble Codes

(d) Check if the same DTC is output.

Result

Proceed to

DTC C004013 is not output.

A

DTC C004013 is output.

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE ACTUATOR ASSEMBLY

4.

CHECK HARNESS AND CONNECTOR (BRAKE PEDAL SUPPORT ASSEMBLY - BRAKE ACTUATOR 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 A51 brake pedal load sensing switch (brake pedal support assembly) connector.

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

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

OK:

No deformation or corrosion.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A51-2 (FSW+) - A41-28 (FSW+)

Always

Below 1 Ω

A51-2 (FSW+) or A41-28 (FSW+) - Body ground

Always

10 kΩ or higher

A51-1 (FSW-) - Body ground

1 minute or more after disconnecting the cable from the negative (-) battery terminal

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT BRAKE PEDAL SUPPORT ASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (FSW+) - 1 (FSW-)

Brake pedal load sensing switch off (Brake pedal depressed)

950 to 1050 Ω

2 (FSW+) - 1 (FSW-)

Brake pedal load sensing switch on (Brake pedal released)

203 to 223 Ω

NOTICE:

  • Do not remove the brake pedal load sensing switch from the brake pedal support assembly.
  • When there is a malfunction in the brake pedal load sensing switch, replace the brake pedal support assembly.

*a

Component without harness connected

(Brake Pedal Load Sensing Switch (Brake Pedal Support Assembly))

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPLACE BRAKE PEDAL SUPPORT ASSEMBLY

    Vehicle Control History
    VEHICLE CONTROL HISTORY DESCRIPTION Vehicle Control History is a function that captures and stores ECU data when triggered by specific vehicle behavior. It may be possible to determine the cause ...

    Brake Pedal Switch "A" Stuck On (C00409E,C00409F)
    DESCRIPTION The brake pedal load sensing switch signal turns on when the brake pedal is depressed with a force exceeding a predetermined level. The skid control ECU (brake actuator assembly) uses this ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Wireless Door Lock Control System: System Description
    SYSTEM DESCRIPTION WIRELESS DOOR LOCK CONTROL SYSTEM The wireless door lock control system can be used to lock and unlock all doors from a distance. The system is controlled by an electrical key transmitter sub-assembly which sends radio waves to the electrical key and tire pressure monitoring syste ...

    Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Lighting (ext): License Plate Light Assembly
    ComponentsCOMPONENTS ILLUSTRATION *1 LICENSE PLATE LIGHT ASSEMBLY - - RemovalREMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. PROCEDURE 1. REMOVE BACK DOOR OUTSIDE GARNISH SUB-ASSEMBLY Click her ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2024 Copyright www.lexusrx.net
    0.019