Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Brake System (C1A50)

DESCRIPTION

When a vehicle stability control system malfunction signal sent from the skid control ECU assembly is detected by the clearance warning ECU assembly, DTC C1A50 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1A50

Brake System

When the engine switch is on (IG), a VSC warning light malfunction signal is detected for 1 second or more.

  • Vehicle stability control system
  • Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).

    Click here

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Using the Techstream, check for DTCs according to the prompts on the screen.

Click here

HINT:

After turning the engine switch from off to on (IG), wait 4 seconds or more before checking for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

(b) Clear the DTCs according to the screen on the Techstream.

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

(c) Recheck for DTCs.

Click here

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

HINT:

  • DTC C1A50 is stored when a malfunction signal sent from the vehicle stability control system is detected.
  • If the malfunctioning part has been repaired or replaced before rechecking for DTCs, DTC C1A50 will not be output again.
  • If DTC C1A50 is output frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again, even though the DTC was not output when rechecking for DTCs.

    Click here

Result

Proceed to

DTC C1A50 is output

A

DTC C1A50 is not output

B

A

GO TO VEHICLE STABILITY CONTROL SYSTEM

B

USE SIMULATION METHOD TO CHECK

    Stop Light Relay Circuit (C1A4B)
    DESCRIPTION When a stop light relay circuit malfunction signal sent from the vehicle stability control system is detected by the clearance warning ECU assembly, DTC C1A4B is stored. DTC No. Detec ...

    Steering Angle Midpoint Initial Setting Incomplete (C1AEA)
    DESCRIPTION When the clearance warning ECU assembly detects that the steering angle neutral point memorization is incomplete during self diagnosis, C1AEA is stored. DTC No. Detection Item DTC D ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual > Rear Speed Sensor (for 2wd): Removal
    REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH side and LH side. The following procedure is for the LH side. The rear speed sensor is a component of the rear axle hub and bearing assembly. If the rear speed sensor is malfunctioning, replace the rear axle hub and beari ...

    Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual > Parking Assist Ecu: Installation
    INSTALLATION PROCEDURE 1. INSTALL PARKING ASSIST ECU (a) Install the parking assist ECU with the bolt and nut. (b) Connect each connector. 2. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY Click here 3. INSTALL NO. 2 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY Click here 4. INSTALL COWL SIDE TRIM BOARD R ...

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

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

    © 2022 Copyright www.lexusrx.net
    0.0188