LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2017 >> IS 200t Base >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Automatic Headlight Beam Level Control System - Diagnostics - Introduction >> Automatic Headlight Beam Level Control System >> Diagnosis System [10/2016 - 09/2020] >> Diagnosis System [10/2016 - 09/2020]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis System [10/2016 - 09/2020]

  1. DESCRIPTION 
    1. Automatic headlight beam level control system data and Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
  2. CHECK DLC3 
    1. Check the DLC3.

      Refer to GENERAL INFORMATION [04/2013 - ]

  3. INSPECT BATTERY VOLTAGE 
    1. Measure the battery voltage.

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the battery.

  4. DIAGNOSIS SYSTEM 
    1. If the automatic headlight beam level control system malfunctions, the "Headlight System Malfunction Visit Your Dealer" warning message will be displayed on the multi-information display.

      HINT: 

      In this case, the No. 1 headlight ECU sub-assembly LH stores DTCs.

      Refer to DTC CHECK / CLEAR [04/2013 - 09/2020]