LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2019 >> GX 460 Base >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System (Diagnostic Codes & Circuit Tests) >> Pre-Collision System >> DTC C1A4A: Skid Control Buzzer Circuit [08/2015 - 08/2019] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC C1A4A: Skid Control Buzzer Circuit [08/2015 - 08/2019]: Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER) 
    1. Select the item below in the Active Test, and then check that the skid control buzzer sounds (Refer to DATA LIST / ACTIVE TEST [08/2015 - 08/2019] ).
      ABS/VSC/TRAC

      Tester Display Test Part Control Range Diagnostic Note
      Buzzer Skid control buzzer ON/OFF The buzzer can be heard.

      OK

      Skid control buzzer sounds.

    Result: 

    NG 

    GO TO VEHICLE STABILITY CONTROL SYSTEM 

    (Refer to PROBLEM SYMPTOMS TABLE [08/2015 - 08/2019] )

    Result: 

    OK 

    See step  2

  2. REPLACE MASTER CYLINDER SOLENOID (SKID CONTROL ECU) 
    1. Replace the master cylinder solenoid (Refer to DISASSEMBLY [08/2015 - ] ).

    Result: 

    NEXT 

    See step  3

  3. CHECK FOR DTC 
    1. Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
    2. Check for DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

      OK

      DTC C1A4A is not output.

    Result: 

    OK 

    END (MASTER CYLINDER SOLENOID [SKID CONTROL ECU] IS DEFECTIVE) 

    Result: 

    NG 

    REPLACE DRIVING SUPPORT ECU 

    (Refer to REMOVAL [08/2015 - 08/2019] )