LIGHTING SYSTEM TERMINALS OF ECU

  1. CHECK HEADLIGHT SWIVEL ECU ASSEMBLY

    E133226N02

    1. Disconnect the A46 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

      A46-22 (E1) - Body ground

      W-B - Body ground

      Headlight swivel ECU ground

      Always

      Below 1 Ω

      A46-14 (IGS) - Body ground

      L - Body ground

      Swivel motor power supply

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      11 to 14 V

      A46-15 (IG) - Body ground

      G - Body ground

      Headlight swivel ECU power supply

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      11 to 14 V

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

    3. Reconnect the A46 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

      A46-21 (SGF) - A46-22 (E1)

      W - W-B

      Rear height control sensor ground

      Always

      Below 1 Ω

      A46-23 (SMGL) - A46-22 (E1)

      G - W-B

      Swivel motor LH ground

      Always

      Below 1 Ω

      A46-24 (SMGR) - A46-22 (E1)

      P - W-B

      Swivel motor RH ground

      Always

      Below 1 Ω

      A46-27 (LH-) - A46-22 (E1)

      LG - W-B

      Leveling motor LH ground

      Always

      Below 1 Ω

      A46-28 (RH-) - A46-22 (E1)

      LG - W-B

      Leveling motor RH ground

      Always

      Below 1 Ω

      A46-1 (SMBL) - A46-22 (E1)

      V - W-B

      Swivel motor LH power supply

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      11 to 16 V

      A46-2 (SMBR) - A46-22 (E1)

      B - W-B

      Swivel motor RH power supply

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      11 to 16 V

      A46-3 (LHT) - A46-22 (E1)

      L - W-B

      Leveling motor LH power supply

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      11 to 16 V

      A46-4 (RHT) - A46-22 (E1)

      GR - W-B

      Leveling motor RH power supply

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      11 to 16 V

      A46-7 (INIT) - A46-22 (E1)

      R - W-B

      Initialization signal

      Engine switch on (IG), terminals LVL and GND of DLC3 connected

      Below 1 V

      Engine switch on (IG), terminals LVL and GND of DLC3 not connected

      Approximately 5 V

      A46-10 (SMR) - A46-22 (E1)

      L - W-B

      Swivel motor RH LIN communication

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      Pulse generation

      (See waveform 1)

      A46-11 (RH+) - A46-22 (E1)

      R - W-B

      Leveling motor RH LIN communication

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      Pulse generation

      (See waveform 1)

      A46-18 (SBF) - A46-21 (SGF)

      R-G - W

      Rear height control sensor power supply

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      Approximately 5 V

      A46-19 (SHRL) - A46-21 (SGF)

      B-R - W

      Rear height control sensor signal

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      1 to 4 V

      A46-29 (SML) - A46-22 (E1)

      W - W-B

      Swivel motor LH LIN communication

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      Pulse generation

      (See waveform 1)

      A46-30 (LH+) - A46-22 (E1)

      R - W-B

      Leveling motor LH LIN communication

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      Pulse generation

      (See waveform 1)

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

      1. E177995N02

        Waveform 1

        Item

        Content

        Terminal No. (Symbol)

        A46-10 (SMR) - A46-22 (E1)

        A46-11 (RH+) - A46-22 (E1)

        A46-29 (SML) - A46-22 (E1)

        A46-30 (LH+) - A46-22 (E1)

        Tool setting

        2 V/DIV., 20 ms./DIV.

        Condition

        Engine switch on (IG)

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

    B235899C10

    *1

    Main body ECU (Multiplex Network Body ECU)

    -

    -

    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

      Engine switch on (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

      Engine switch on (IG)

      11 to 14 V

      A-11 (GND1) - Body ground

      -

      Ground

      Always

      Below 1 Ω

      G46-3 (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

      G46-23 (RFOG) - 2D-4 (GND1)*

      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

      G47-1 (GCTY) - 2D-4 (GND1)

      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)

      G47-3 (HAZ) - 2D-4 (GND1)

      W - W-B

      Hazard warning signal switch output

      Hazard warning signal switch on

      Below 1 V

      Hazard warning signal switch off

      11 to 14 V

      G47-5 (HU) - 2D-4 (GND1)

      LG - W-B

      Headlight dimmer switch high signal input

      Headlight dimmer switch in head and high

      Below 1 V

      Headlight dimmer switch in head and low

      Pulse generation

      (See waveform 3 or 4)

      G47-6 (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

      G47-8 (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

      G47-15 (DIM) - 2D-4 (GND1)

      P - W-B

      Running light relay drive output

      Headlight dimmer switch in head and high or high flash

      Below 1 V

      Headlight dimmer switch not in head and high or high flash

      11 to 14 V

      G47-19 (BCTY) - 2D-4 (GND1)

      G - W-B

      Back door courtesy light switch signal

      Back door open

      Below 1 V

      Back door closed

      (See waveform 5 or 6)

      G47-20 (CLTB) - 2D-4 (GND1)

      P - W-B

      Automatic light control sensor power supply output

      Engine switch off

      Below 1 V

      Engine switch on (IG) and headlight dimmer switch in AUTO position

      11 to 14 V

      G47-21 (CLTS) - 2D-4 (GND1)

      R - W-B

      Automatic light control sensor signal input

      Engine switch off

      Below 1 V

      Engine switch on (IG)

      Headlight dimmer switch AUTO

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

      Pulse generation

      (See waveform 11)

      G47-27 (FFOG) - 2D-4 (GND1)

      G - W-B

      Front fog light switch input

      Front fog light switch on

      Below 1 V

      Front fog light switch off

      Pulse generation

      (See waveform 7 or 8)

      G47-28 (A) - 2D-4 (GND1)

      W - W-B

      Headlight dimmer switch AUTO signal input

      Headlight dimmer switch in AUTO

      Below 1 V

      Headlight dimmer switch not in AUTO

      Pulse generation

      (See waveform 9 or 10)

      G47-29 (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

      G47-30 (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

      G48-3 (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

      2F-24 (DRL) - 2D-4 (GND1)

      P - W-B

      DRL relay drive output

      Daytime running light on

      Below 1 V

      Daytime running light off

      11 to 14 V

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

      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)

      W - W-B

      Front fog light signal output

      Headlight dimmer switch in tail and front fog light switch on

      11 to 14 V

      Front fog light switch off

      Below 1 V

      2F-19 (RFGO) - 2D-4 (GND1)*

      GR-L - W-B

      Rear fog light signal output

      Headlight dimmer switch in tail and rear fog light switch on

      11 to 14 V

      Rear fog light switch off

      Below 1 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

      2H-16 (TRLY) - 2D-4 (GND1)

      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

      2H-27 (FLCY) - 2D-4 (GND1)

      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

      • *: w/ Rear Fog Light

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

      1. B199631N20

        Waveform 1

        Item

        Content

        Terminal No. (Symbol)

        G47-1 (GCTY) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Glass hatch closed
      2. B199632N17

        Waveform 2

        Item

        Content

        Terminal No. (Symbol)

        G47-1 (GCTY) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Glass hatch closed
      3. B199631N20

        Waveform 3

        Item

        Content

        Terminal No. (Symbol)

        G47-5 (HU) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Headlight dimmer switch in head and low
      4. B199632N17

        Waveform 4

        Item

        Content

        Terminal No. (Symbol)

        G47-5 (HU) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Headlight dimmer switch in head and low
      5. B199631N20

        Waveform 5

        Item

        Content

        Terminal No. (Symbol)

        G47-19 (BCTY) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Back door closed
      6. B199632N17

        Waveform 6

        Item

        Content

        Terminal No. (Symbol)

        G47-19 (BCTY) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Back door closed
      7. B199631N20

        Waveform 7

        Item

        Content

        Terminal No. (Symbol)

        G47-27 (FFOG) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Front fog light switch off
      8. B199632N17

        Waveform 8

        Item

        Content

        Terminal No. (Symbol)

        G47-27 (FFOG) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Front fog light switch off
      9. B199631N20

        Waveform 9

        Item

        Content

        Terminal No. (Symbol)

        G47-28 (A) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Headlight dimmer switch not in AUTO
      10. B199632N17

        Waveform 10

        Item

        Content

        Terminal No. (Symbol)

        G47-28 (A) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 20 ms./DIV.

        Condition

        Headlight dimmer switch not in AUTO
      11. B113714N02

        Waveform 11

        Item

        Content

        Terminal No. (Symbol)

        G47-21 (CLTS) - 2D-4 (GND1)

        Tool setting

        5 V/DIV., 5 ms./DIV.

        Condition

        Engine switch on (IG)

        Headlight dimmer switch AUTO

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

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