LIGHTING SYSTEM TERMINALS OF ECU


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

    B001DGFE02
    Text in Illustration
    *A for LHD *B for RHD
    *1 Main body ECU (multiplex network body ECU) - -

    1. Remove the main body ECU Click here.

    2. Measure the voltage and resistance 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
      G63-4 (OILE) - 2D-4 (GND1)*3 W - W-B Side step light signal output Side step light on 11 to 14 V
      Side step light off Below 1 V
      G63-5 (ILUP) - 2D-4 (GND1)*5 L - W-B Room light switch up signal Room light switch up Below 1 V
      Room light switch off 11 to 14 V
      2D-13 (ILDN) - 2D-4 (GND1)*5 B - W-B Room light switch down signal Room light switch down Below 1 V
      Room 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

      Pulse generation

      (See waveform 1 or 2)
      G64-2 (DOMR) - 2D-4 (GND1) GR - W-B Battery saving control (interior light auto cut function) signal Battery saving control (interior light auto cut function) not operating Below 1 V
      Battery saving control (interior light auto cut function) operating 11 to 14 V
      G64-6 (RCTY) - 2D-4 (GND1) 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
      G64-19 (BCTY) - 2D-4 (GND1) G - W-B Back door courtesy light switch signal Back door open Below 1 V
      Back door closed

      Pulse generation

      (See waveform 3 or 4)
      G65-2 (OSPT) - 2D-4 (GND1)*5 SB - W-B Front door illumination signal Front door illumination on Below 1 V
      Front door illumination off 11 to 14 V
      G65-3 (LCTY) - 2D-4 (GND1) 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
      G65-5 (CSPT) - 2D-4 (GND1) GR - W-B Center console spot light signal Ignition switch off 11 to 14 V
      Ignition switch ON or ACC Below 1 V
      G65-6 (TSPT) - 2D-4 (GND1)*5 SB - W-B Rear door illumination signal Rear door illumination on Below 1 V
      Rear door illumination off 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
      2D-18 (ILE) - 2D-4 (GND1) G - W-B Interior light signal Interior light on Below 1 V
      Interior light off 11 to 14 V
      2D-36 (FSPT) - 2D-4 (GND1)*4 SB - W-B Interior foot light signal Interior foot light on Below 1 V
      Interior foot light off 11 to 14 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

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Side Step Light

      • *4: w/ Interior Foot Light

      • *5: w/ Door Illumination

      • *6: w/ Glass Hatch Opener System

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


      1. B001DE0E01

        Waveform 1

        Item Content
        Terminal No. (Symbol) G64-1 (GCTY) - 2D-4 (GND1)
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition Glass hatch closed
      2. B001H4LE01

        Waveform 2

        Item Content
        Terminal No. (Symbol) G64-1 (GCTY) - 2D-4 (GND1)
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition Glass hatch closed
      3. B001DE0E01

        Waveform 3

        Item Content
        Terminal No. (Symbol) G64-19 (BCTY) - 2D-4 (GND1)
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition Back door closed
      4. B001H4LE01

        Waveform 4

        Item Content
        Terminal No. (Symbol) G64-19 (BCTY) - 2D-4 (GND1)
        Tool setting 5 V/DIV., 20 ms./DIV.
        Condition Back door closed