AUTOMATIC HIGH BEAM SYSTEM TERMINALS OF ECU

  1. CHECK AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY)

    E261582N01

    1. Disconnect the A93 AFS ECU (headlight swivel ECU assembly) connector.

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A93-22 (E1) - Body ground

      W-B - Body ground

      AFS ECU (headlight swivel ECU assembly) ground

      Always

      Below 1 Ω

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

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A93-15 (IG) - Body ground

      L - Body ground

      AFS ECU (headlight swivel ECU assembly) 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 in the wire harness.

    4. Reconnect the A93 AFS ECU (headlight swivel ECU assembly) connector.

    5. Measure the voltage and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      A93-30 (LHT) - A93-22 (E1)

      LG - W-B

      LIN communication

      Ignition switch off

      Below 1 V

      Ignition switch ON

      Pulse generation

      A93-12 (CANH) - A93-22 (E1)

      Y - W-B

      CAN communication

      Ignition switch off

      Below 1 V

      Ignition switch ON

      Pulse generation

      A93-13 (CANL) - A93-22 (E1)

      W - W-B

      CAN communication

      Ignition switch off

      Below 1 V

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the AFS ECU (headlight swivel ECU assembly) may be malfunctioning.

  2. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    B332798C11

    *A

    Main Body ECU (Multiplex Network Body ECU) with 1 Connector

    -

    -

    *1

    Main Body ECU (Multiplex Network Body ECU)

    -

    -

    *a

    1 Connector

    -

    -
    B332794C10

    *A

    Main Body ECU (Multiplex Network Body ECU) with 2 Connectors

    -

    -

    *1

    Main Body ECU (Multiplex Network Body ECU)

    -

    -

    *a

    2 Connectors

    -

    -

    1. Measure the voltage and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      3A-54 - Body ground

      LG - Body ground

      High beam headlight drive output

      Dimmer switch in high or high flash position

      Below 1 V

      Dimmer switch in low position

      11 to 14 V

      E22-5 (HU) - Body ground

      P - Body ground

      Dimmer switch high position signal input

      Dimmer switch in high position

      Below 1 V

      Dimmer switch not in high position

      11 to 14 V

      E22-20 (CLTB) - E22-22 (CLTE)

      W - V

      Automatic light control sensor power supply output

      Ignition switch off

      Below 1 V

      Ignition switch ON, light control switch in AUTO position

      11 to 14 V

      E22-21 (CLTS) - Body ground

      Y - Body ground

      Automatic light control sensor signal input

      Ignition switch off

      Below 1 V

      Automatic light control system operating

      Pulse generation

      (See waveform 1)

      E22-28 (A) - Body ground

      V - Body ground

      Light control switch AUTO position signal input

      Light control switch in AUTO position

      Below 1 V

      Light control switch not in AUTO position

      Pulse generation

      E22-14 (CANH) - Body ground

      G - Body ground

      CAN Communication

      Ignition switch off

      Below 1 V

      Ignition switch ON

      Pulse generation

      E22-13 (CANL) - Body ground

      W - Body ground

      CAN Communication

      Ignition switch off

      Below 1 V

      Ignition switch ON

      Pulse generation

      If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may be malfunctioning.

      1. B113714N01

        Waveform 1

        Item

        Content

        Tool setting

        5 V/DIV., 5 ms./DIV.
        Tip:

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

  3. CHECK INNER REAR VIEW MIRROR ASSEMBLY

    E233259N02

    1. Disconnect the O3 inner rear view mirror assembly connector.

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      O3-1 (E) - Body ground

      W-B - Body ground

      Inner rear view mirror assembly ground

      Always

      Below 1 Ω

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

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

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      O3-4 (IG) - Body ground

      L - Body ground

      Inner rear view mirror assembly 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 in the wire harness.

    4. Reconnect the O3 inner rear view mirror assembly connector.

    5. Measure the voltage or check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol)

      Wiring Color

      Terminal Description

      Condition

      Specified Condition

      O3-5 (LIN) - O3-1 (E)

      LG - W-B

      LIN communication

      Ignition switch off

      Below 1 V

      Automatic high beam system operating

      Pulse generation

      (See waveform 1)

      If the result is not as specified, the inner rear view mirror assembly may be malfunctioning.

      1. E259634N01

        Waveform 1

        Item

        Content

        Tool setting

        2 V/DIV., 10 ms./DIV.