LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2021 >> IS 350 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 47 (Adaptive Front-Lighting System - Diagnostics - Introduction) >> AFS (Adaptive Front-Lighting System) >> Terminals Of Ecu [10/2016 - 09/2020] >> Terminals Of Ecu [10/2016 - 09/2020]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Terminals Of Ecu [10/2016 - 09/2020]

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2020 Lexus IS 350, 2020 Lexus IS 300, 2019 Lexus IS 350, 2019 Lexus IS 300, and 2018 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HEADLIGHT SWIVEL ECU ASSEMBLY 
    Fig 1: Headlight Swivel ECU Assembly Connector End View
    GTY661224Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A104 headlight swivel ECU assembly connector.
    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A104-14 (IGS) - Body ground B - Body ground Headlight swivel motor power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A104-15 (IG) - Body ground B - Body ground Headlight swivel ECU assembly power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A104-22 (E1) - Body ground W-B - Body ground Headlight swivel ECU assembly ground Always Below 1 Ω
    3. Connect the A104 headlight swivel ECU assembly connector.
    4. Measure the voltage, resistance and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A104-1 (SMBL) - A104-22 (E1) P - W-B Headlight swivel motor LH power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A104-2 (SMBR) - A104-22 (E1) L - W-B Headlight swivel motor RH power supply Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      A104-10 (SMR) - A104-22 (E1) SB - W-B Headlight swivel motor RH LIN communication Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
      A104-11 (RH+) - A104-22 (E1) BE - W-B Headlight swivel motor RH LIN communication Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
      A104-12 (CANH) - A104-22 (E1) LG - W-B CAN communication Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
      A104-13 (CANL) - A104-22 (E1) B - W-B CAN communication Engine switch off Below 1 Ω
      Engine switch on (IG) Pulse generation
      A104-18 (SBR) - A104-21 (SGR) GR - LG Rear height control sensor sub-assembly LH power supply Engine switch off Below 1 Ω
      Engine switch on (IG) 4.7 to 5.2 V
      A104-19 (SHRL) - A104-21 (SGR) G - LG Rear height control sensor sub-assembly LH signal Engine switch off Below 1 Ω
      Engine switch on (IG) 0.5 to 4.5 V
      A104-21 (SGR) - A104-22 (E1) LG - W-B Rear height control sensor sub-assembly LH ground Always Below 1 Ω
      A104-27 (SMGL) - A104-22 (E1) BE - W-B Headlight swivel motor LH ground Always Below 1 Ω
      A104-28 (SMGR) - A104-22 (E1) V - W-B Headlight swivel motor RH ground Always Below 1 Ω
      A104-29 (SML) - A104-22 (E1) SB - W-B Headlight swivel motor LH LIN communication Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
      A104-30 (LH+) - A104-22 (E1) W - W-B Headlight swivel motor LH LIN communication Engine switch off Below 1 V
      Engine switch on (IG) Pulse generation
scientia non olet · About LEMON Manuals