Lexus RX (RX 350L, RX450h) 2016-2022 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) 2016-2022 Repair Manual > Steering Gear: Disassembly
    DISASSEMBLY PROCEDURE 1. REMOVE STEERING RACK BOOT CLIP (for LH Side) (a) Using pliers, remove the steering rack boot clip. 2. REMOVE STEERING RACK BOOT CLIP (for RH Side) HINT: Perform the same procedure as for the LH side. 3. REMOVE NO. 2 STEERING RACK BOOT CLAMP (for LH Side) (a) Using a screw ...

    Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Lost Communication With ECM/PCM "A" Missing Message (U010087,U012587,U012987,U014087)
    DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the forward recognition camera and other ECUs. DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from U010087 Lost Communication With ECM/PCM "A" Missing Message The forward re ...

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

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

    © 2022 Copyright www.lexusrx.net
    0.0164