LIGHTING SYSTEM TERMINALS OF ECU


  1. CHECK HEADLIGHT SWIVEL ECU ASSEMBLY

    A009ACJE16

    1. Disconnect the A58 headlight swivel ECU connector.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A58-22 (E1) - Body ground W-B - Body ground Headlight swivel ECU ground Always Below 1 Ω
      A58-14 (IGS) - Body ground L - Body ground Swivel motor power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      A58-15 (IG) - Body ground G - Body ground Headlight swivel ECU power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the A58 headlight swivel ECU connector.

    4. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A58-21 (SGF) - A58-22 (E1) W - W-B Rear height control sensor ground Always Below 1 Ω
      A58-23 (SMGL) - A58-22 (E1) G - W-B Swivel motor LH ground Always Below 1 Ω
      A58-24 (SMGR) - A58-22 (E1) P - W-B Swivel motor RH ground Always Below 1 Ω
      A58-27 (LH-) - A58-22 (E1) LG - W-B Leveling motor LH ground Always Below 1 Ω
      A58-28 (RH-) - A58-22 (E1) LG - W-B Leveling motor RH ground Always Below 1 Ω
      A58-1 (SMBL) - A58-22 (E1) V - W-B Swivel motor LH power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 16 V
      A58-2 (SMBR) - A58-22 (E1) B - W-B Swivel motor RH power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 16 V
      A58-3 (LHT) - A58-22 (E1) L - W-B Leveling motor LH power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 16 V
      A58-4 (RHT) - A58-22 (E1) GR - W-B Leveling motor RH power supply Ignition switch off Below 1 V
      Ignition switch ON 11 to 16 V
      A58-7 (INIT) - A58-22 (E1) R - W-B Initialization signal Ignition switch ON, terminals LVL and GND of DLC3 connected Below 1 V
      Ignition switch ON, terminals LVL and GND of DLC3 not connected Approx. 5 V
      A58-10 (SMR) - A58-22 (E1) L - W-B Swivel motor RH LIN communication Ignition switch off Below 1 V
      Ignition switch ON Pulse generation
      A58-11 (RH+) - A58-22 (E1) R - W-B Leveling motor RH LIN communication Ignition switch off Below 1 V
      Ignition switch ON Pulse generation
      A58-18 (SBF) - A58-21 (SGF) R-G - W Rear height control sensor power supply Ignition switch off Below 1 V
      Ignition switch ON Approx. 5 V
      A58-19 (SHRL) - A58-21 (SGF) B-R - W Rear height control sensor signal Ignition switch off Below 1 V
      Ignition switch ON 1 to 4 V
      A58-29 (SML) - A58-22 (E1) W - W-B Swivel motor LH LIN communication Ignition switch off Below 1 V
      Ignition switch ON Pulse generation
      A58-30 (LH+) - A58-22 (E1) R - W-B Leveling motor LH LIN communication Ignition switch off Below 1 V
      Ignition switch ON Pulse generation

      If the result is not as specified, the headlight swivel ECU may have a malfunction.

  2. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    A0099Y4E08
    Text in Illustration
    *A for LHD *B for RHD

    1. Remove the main body ECU Click here.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-29 (ACC) - Body ground - ACC power supply Ignition switch ACC 11 to 14 V
      A-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-32 (IG) - Body ground - Ignition power supply Ignition switch ON 11 to 14 V
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω
      G63-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Install the main body ECU Click here.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G63-23 (RFOG) - 2D-4 (GND1)*5 SB - W-B Rear fog light switch input Rear fog light switch on Below 1 V
      Rear fog light switch off 11 to 14 V
      G64-1 (GCTY) - 2D-4 (GND1)*6 V - W-B Glass hatch courtesy light switch signal Glass hatch open Below 1 V
      Glass hatch closed 11 to 14 V
      G64-3 (HAZ) - 2D-4 (GND1) W - W-B Hazard warning signal switch output Hazard warning signal switch on 11 to 14 V
      Hazard warning signal switch off Below 1 V
      G64-5 (HU) - 2D-4 (GND1) LG - W-B Headlight dimmer switch high signal input Headlight dimmer switch in high Below 1 V
      Headlight dimmer switch in low 11 to 14 V
      G64-6 (RCTY) - 2D-4 (GND1)*7 R - W-B Rear door courtesy light switch RH signal Rear door RH open Below 1 V
      Rear door RH closed 11 to 14 V
      G64-8 (HF) - 2D-4 (GND1) V - W-B Headlight dimmer switch high flash signal input Headlight dimmer switch in high flash position Below 1 V
      Headlight dimmer switch not in high flash position 11 to 14 V
      G64-15 (DIM) - 2D-4 (GND1) P - W-B H-LP HI relay drive output Headlight dimmer switch in high or high flash Below 1 V
      Headlight dimmer switch not in high or high flash 11 to 14 V
      G64-19 (BCTY) - 2D-4 (GND1) G - W-B Back door courtesy light switch signal Back door open Below 1 V
      Back door closed 11 to 14 V
      G64-20 (CLTB) - 2D-4 (GND1)*3 P - W-B Automatic light control sensor power supply output Ignition switch off Below 1 V
      Ignition switch ON and headlight dimmer switch in AUTO position 11 to 14 V
      G64-21 (CLTS) - 2D-4 (GND1)*3 R - W-B Automatic light control sensor signal input Ignition switch off Below 1 V
      Automatic light control system operates

      Pulse generation

      (See waveform 1)
      G64-27 (FFOG) - 2D-4 (GND1)*4 G - W-B Front fog light switch input Front fog light switch on Below 1 V
      Front fog light switch off 11 to 14 V
      G64-28 (A) - 2D-4 (GND1)*3 W - W-B Headlight dimmer switch AUTO signal input Headlight dimmer switch in AUTO Below 1 V
      Headlight dimmer switch not in AUTO 11 to 14 V
      G64-29 (HEAD) - 2D-4 (GND1) SB - W-B Headlight dimmer switch head signal input Headlight dimmer switch in head Below 1 V
      Headlight dimmer switch not in head 11 to 14 V
      G64-30 (TAIL) - 2D-4 (GND1) W - W-B Headlight dimmer switch tail signal input Headlight dimmer switch in tail or head Below 1 V
      Headlight dimmer switch in neither tail nor head 11 to 14 V
      G65-3 (LCTY) - 2D-4 (GND1)*7 V - W-B Rear door courtesy light switch LH signal Rear door LH open Below 1 V
      Rear door LH closed 11 to 14 V

      2D-15 (FRCY) - 2D-4 (GND1)*1

      2H-26 (FRCY) - 2D-4 (GND1)*2

      		 B - W-B Front door courtesy light switch RH signal Front door RH open Below 1 V
      Front door RH closed 11 to 14 V
      2F-7 (TRLY) - 2D-4 (GND1) LG - W-B Clearance light signal output Headlight dimmer switch in tail position 11 to 14 V
      Headlight dimmer switch not in tail position Below 1 V
      2F-9 (FFGO) - 2D-4 (GND1)*4 W - W-B Front fog light signal output Headlight dimmer switch in tail and front fog light switch on Below 1 V
      Front fog light switch off 11 to 14 V
      2F-19 (RFGO) - 2D-4 (GND1)*5 GR-L - W-B Rear fog light signal output Headlight dimmer switch in tail and rear fog light switch on Below 1 V
      Rear fog light switch off 11 to 14 V
      2F-40 (HRLY) - 2D-4 (GND1) GR - W-B H-LP LO relay drive output Headlight dimmer switch in head Below 1 V
      Headlight dimmer switch not in head 11 to 14 V

      2I-16 (TRLY) - 2D-4 (GND1)*1

      2D-32 (TRLY) - 2D-4 (GND1)*2

      		 LG - W-B Taillight and license plate light signal output Headlight dimmer switch in tail position 11 to 14 V
      Headlight dimmer switch not in tail position Below 1 V

      2I-27 (FLCY) - 2D-4 (GND1)*1

      2D-31 (FLCY) - 2D-4 (GND1)*2

      		 R - W-B Front door courtesy light switch LH signal Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      2K-1 (TRLY) - 2D-4 (GND1) B - W-B Battery power supply Always 11 to 14 V

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Automatic Light Control System

      • *4: w/ Front Fog Light

      • *5: w/ Rear Fog Light

      • *6: w/ Glass Hatch Opener System

      • *7: for 5 Door

      If the result is not as specified, the main body ECU may have a malfunction.


      1. A00950GE01

        Waveform 1

        Item Content
        Terminal No. (Symbol) G64-21 (CLTS) - 2D-4 (GND1)
        Tool setting 5 V/DIV., 5 ms./DIV.
        Condition

        Ignition switch ON

        Headlight dimmer switch AUTO

        Automatic light control sensor covered with a hand → Automatic light control sensor exposed to ambient light

        Tech Tips

        When the ambient light becomes brighter, width A becomes narrower.