LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2021 >> LX 570 >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System (Diagnostics - Introduction) >> Pre-Collision System >> Utility [09/2015 - ] >> Utility [09/2015 - ]

Utility [09/2015 - ]

NOTE:
  • When replacing a millimeter wave radar sensor assembly, replace it with a new one. When the millimeter wave radar sensor assembly is replaced with a new one, it stores the country specification information received from the driving support ECU assembly.

    If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.

  • If the millimeter wave radar sensor assembly has been replaced or removed/installed, be sure to perform Front Beam Axis Adjustment. If not performed, DTC C1A14 will be stored when the system is turned on.
  1. Pre-collision System Utility 
    1. Front Beam Axis Adjustment

      HINT: 

      Front Beam Axis Adjustment of the millimeter wave radar sensor assembly is performed using the Techstream. Refer to ADJUSTMENT [09/2015 - ] .

    2. Front Beam Axis Misalignment Reading

      HINT: 

      The amount of misalignment of the millimeter wave radar sensor assembly can be checked using the Techstream. Refer to ADJUSTMENT [09/2015 - ] .

    3. Front Beam Axis Offset Reading

      HINT: 

      The offset of the millimeter wave radar sensor assembly can be checked using the Techstream. Refer to ADJUSTMENT [09/2015 - ] .

    4. Control Mode

      HINT: 

      • When reproducing problem symptoms of the pre-collision system, do not attempt to operate the pre-collision brake control, only operate the pre-collision alarm control.
      • Operating the pre-collision brake assist control or pre-collision brake control when reproducing problem symptoms may lead to a dangerous situation. To avoid this, do not attempt to operate the pre-collision brake control, only operate the pre-collision alarm control (buzzer and warning message) when reproducing the problem symptoms.
        WARNING BUZZER

        PCS Control Operated Buzzer Sound
        Pre-collision alarm control Continuous
        Pre-collision brake assist control Long intermittent
        Pre-collision brake control Short intermittent
      1. Connect the Techstream to the DLC3.
      2. Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Control Mode.
      3. Perform Control Mode according to the display on the Techstream.
    5. History Clear

      HINT: 

      If the status of any history data is "ON", clear the history data.

      1. Connect the Techstream to the DLC3.
      2. Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / History Clear.
      3. Perform History Clear according to the display on the Techstream.