LIGHTING SYSTEM TERMINALS OF ECU


  1. CHECK COWL SIDE JUNCTION BLOCK LH, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    B002BJJE18
    Text in Illustration
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU from the cowl side junction block LH Click here.

    2. Connect the cowl side junction block LH connectors.

    3. 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-32 (IG) - Body ground - Ignition power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      A-30 (BECU) - Body ground - Battery power supply Power switch off 11 to 14 V
      A-29 (ACC) - Body ground - ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω

    4. Install the main body ECU Click here.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      N12-5 (HU) - Body ground P - Body ground Headlight dimmer switch high signal input Headlight dimmer switch in high position Below 1 V
      Headlight dimmer switch in low position 11 to 14 V
      N12-8 (HF) - Body ground L - Body ground 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
      N12-28 (A) - Body ground R - Body ground Headlight dimmer switch AUTO signal input Headlight dimmer switch in AUTO position Below 1 V
      Headlight dimmer switch not in AUTO position 11 to 14 V
      N12-29 (HEAD) - Body ground LG - Body ground Headlight dimmer switch head signal input Headlight dimmer switch in head position Below 1 V
      Headlight dimmer switch not in head position 11 to 14 V
      N12-30 (TAIL) - Body ground B - Body ground Headlight dimmer switch tail signal input Headlight dimmer switch in tail or head position Below 1 V
      Headlight dimmer switch in neither tail nor head position 11 to 14 V
      N12-20 (CLTB) - N12-22 (CLTE) GR - W Automatic light control sensor power supply output Power switch off Below 1 V
      Power switch on (IG) and headlight dimmer switch in AUTO position 11 to 14 V
      N12-21 (CLTS) - Body ground R - Body ground Automatic light control sensor signal input Power switch off Below 1 V

      Power switch on (IG)

      Headlight dimmer switch in AUTO position

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

      Pulse generation

      (See waveform)
      N12-27 (FFOG) - Body ground*1 Y - Body ground Front fog light switch input Front fog light switch on Below 1 V
      Front fog light switch off 11 to 14 V
      N13-17 (AHBI) - Body ground*2, *6 Y - Body ground Automatic high beam main switch input Automatic high beam main switch on Below 1 V
      Automatic high beam main switch off 11 to 14 V
      N13-23 (RFOG) - Body ground*3 GR - Body ground Rear fog light switch input Rear fog light switch on Below 1 V
      Rear fog light switch off 11 to 14 V
      5D-9 (HRLY) - Body ground Y - Body ground LP LAMP relay drive output Headlight dimmer switch in head position Below 1 V
      Headlight dimmer switch not in head position 11 to 14 V
      5D-11 (TRLY) - Body ground R - Body ground No. 2 integration relay (TAIL relay) drive output Headlight dimmer switch in tail position Below 1 V
      Headlight dimmer switch not in tail position 11 to 14 V
      5D-21 (DIM) - Body ground LG - Body ground No. 2 integration relay (DIMMER relay) drive output Headlight dimmer switch in high or high flash position Below 1 V
      Headlight dimmer switch not in high or high flash position 11 to 14 V
      5D-22 (FFGO) - Body ground*1 GR - Body ground Front fog light signal output Headlight dimmer switch in tail position and front fog light switch on Below 1 V
      Front fog light switch off 11 to 14 V
      5C-16 (RFGO) - Body ground*3 GR - Body ground Rear fog light signal output Headlight dimmer switch in tail position and rear fog light switch on Below 1 V
      Rear fog light switch off 11 to 14 V

      • *1: w/ Front Fog Light

      • *2: w/ Automatic High Beam System

      • *3: w/ Rear Fog Light

      • *4: for LHD

      • *5: for RHD

      • *6: w/ Adaptive High Beam System


      1. B002B4VE01

        Waveform

        Item Content
        Terminal No. (Symbol) N12-21 (CLTS) - Body ground
        Tool setting 5 V/DIV., 5 ms./DIV.
        Condition

        Power switch on (IG)

        Headlight dimmer switch in AUTO position

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

        Tech Tips

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

  2. CHECK HEADLIGHT ECU SUB-ASSEMBLY LH (for Single Beam Headlight)

    B002B4AE02
    Text in Illustration
    *A w/ AFS (Adaptive Front-lighting System) - -

    1. Disconnect the B16 headlight ECU sub-assembly LH connector.

    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
      B16-4 (IG) - Body ground LG - Body ground Ignition power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      B16-13 (ECUB) - Body ground G - Body ground Battery power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      B16-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the B16 headlight ECU sub-assembly LH connector.

      Tech Tips


      • Since the B16 headlight ECU sub-assembly LH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

      • Since the B headlight ECU sub-assembly LH connector is connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

      w/o AFS (Adaptive Front-lighting System)
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      B16-11 (TNS) - Body ground W - Body ground Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B16-16 (SBR) - B16-15 (SGR) R - B Rear height control sensor sub-assembly LH power supply Power switch on (IG) 4.75 to 5.25 V
      B16-17 (SHRL) - B16-15 (SGR) P - B Rear height control sensor sub-assembly LH signal input Power switch on (IG), vehicle unloaded, vehicle stopped

      Approximately 2.5 V

      (value decreases as the front of the vehicle is raised)
      B16-20 (LINL) - Body ground B - Body ground LIN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B-1 - B-10 - Low beam headlights/high beam headlights switching signal output High beam headlights off Below 1 V
      High beam headlights on 11 to 14 V
      B-4 - B-5 - Headlight light signal output High beam and low beam headlights off Below 1 V
      High beam or low beam headlights on 11.2 to 17.7 V
      B-6 - B-14 - Headlight light signal output Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 - B-17 - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-8 - B-17 - Headlight leveling motor power source Power switch on (IG), when low beam headlights turn on, vehicle height not changed Below 1 V
      Power switch on (IG), when low beam headlights turn on, vehicle height changed and maintained for more than 3 seconds 11 to 14 V
      B-9 - B-13 - Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B-11 - B-16 - Daytime running lights/clearance lights duty control signal output Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on Pulse generation
      B-15 - B-14 - Headlight fan duty control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation
      B-11 - B-20 - Daytime running lights/clearance lights power source Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on 11 to 14 V
      w/ AFS (Adaptive Front-lighting System)
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      B16-11 (TNS) - Body ground W - Body ground Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B16-16 (SBR) - B16-15 (SGR) R - B Rear height control sensor sub-assembly LH power supply Power switch on (IG) 4.75 to 5.25 V
      B16-17 (SHRL) - B16-15 (SGR) P - B Rear height control sensor sub-assembly LH signal input Power switch on (IG), vehicle unloaded, vehicle stopped

      Approximately 2.5 V

      (value decreases as the front of the vehicle is raised)
      B16-19 (LINS) - Body ground L - Body ground LIN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B16-21 (LCL) - Body ground W - Body ground CAN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B16-22 (LCH) - Body ground Y - Body ground CAN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B-1 - B-10 - Low beam headlights/high beam headlights switching signal output High beam headlights off Below 1 V
      High beam headlights on 11 to 14 V
      B-4 - B-3 - Headlight light signal output High beam and low beam headlights off Below 1 V
      High beam or low beam headlights on 11.2 to 17.7 V
      B-6 - B-14 - Headlight light signal output Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 - B-17 - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      C-13 - B-17 - Headlight leveling motor power source Power switch on (IG), when low beam headlights turn on, vehicle height not changed Below 1 V
      Power switch on (IG), when low beam headlights turn on, vehicle height changed and maintained for more than 3 seconds 11 to 14 V
      B-9 - B-13 - Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B-11 - B-16 - Daytime running lights/clearance lights duty control signal output Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on Pulse generation
      B-15 - B-14 - Headlight fan duty control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation
      B-11 - B-20 - Daytime running lights/clearance lights power source Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on 11 to 14 V

  3. CHECK HEADLIGHT ECU SUB-ASSEMBLY RH (for Single Beam Headlight)

    B002BD1E02
    Text in Illustration
    *A w/ AFS (Adaptive Front-lighting System) - -

    1. Disconnect the B15 headlight ECU sub-assembly RH connector.

    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
      B15-4 (IG) - Body ground LG - Body ground Ignition power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      B15-13 (ECUB) - Body ground B - Body ground Battery power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      B15-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the B15 headlight ECU sub-assembly RH connector.

      Tech Tips


      • Since the B15 headlight ECU sub-assembly RH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

      • Since the B headlight ECU sub-assembly RH connector is connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

      w/o AFS (Adaptive Front-lighting System)
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      B15-11 (TNS) - Body ground Y - Body ground Right turn signal light signal input Power switch on (IG), right turn signal light off Below 1 V
      Power switch on (IG), right turn signal light blinking 11 to 14 V ←→ Below 1 V
      B15-20 (LINL) - Body ground B - Body ground LIN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B-1 - B-10 - Low beam headlights/high beam headlights switching signal output High beam headlights off Below 1 V
      High beam headlights on 11 to 14 V
      B-4 - B-5 - Headlight light signal output High beam and low beam headlights off Below 1 V
      High beam or low beam headlights on 11.2 to 17.7 V
      B-6 - B-14 - Headlight light signal output Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 - B-17 - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-8 - B-17 - Headlight leveling motor power source Power switch on (IG), when low beam headlights turn on, vehicle height not changed Below 1 V
      Power switch on (IG), when low beam headlights turn on, vehicle height changed and maintained for more than 3 seconds 11 to 14 V
      B-9 - B-13 - Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B-11 - B-16 - Daytime running lights/clearance lights duty control signal output Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on Pulse generation
      B-15 - B-14 - Headlight fan duty control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation
      B-11 - B-20 - Daytime running lights/clearance lights power source Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on 11 to 14 V
      w/ AFS (Adaptive Front-lighting System)
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      B15-11 (TNS) - Body ground Y - Body ground Right turn signal light signal input Power switch on (IG), right turn signal light off Below 1 V
      Power switch on (IG), right turn signal light blinking 11 to 14 V ←→ Below 1 V
      B15-20 (LINL) - Body ground B - Body ground LIN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B15-21 (LCL) - Body ground W - Body ground CAN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B15-22 (LCH) - Body ground Y - Body ground CAN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B-1 - B-10 - Low beam headlights/high beam headlights switching signal output High beam headlights off Below 1 V
      High beam headlights on 11 to 14 V
      B-4 - B-3 - Headlight light signal output High beam and low beam headlights off Below 1 V
      High beam or low beam headlights on 11.2 to 17.7 V
      B-6 - B-14 - Headlight light signal output Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 - B-17 - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      C-13 - B-17 - Headlight leveling motor power source Power switch on (IG), when low beam headlights turn on, vehicle height not changed Below 1 V
      Power switch on (IG), when low beam headlights turn on, vehicle height changed and maintained for more than 3 seconds 11 to 14 V
      B-9 - B-13 - Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B-11 - B-16 - Daytime running lights/clearance lights duty control signal output Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on Pulse generation
      B-15 - B-14 - Headlight fan duty control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation
      B-11 - B-20 - Daytime running lights/clearance lights power source Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on 11 to 14 V

  4. CHECK HEADLIGHT ECU SUB-ASSEMBLY LH (for Triple Beam Headlight)

    B002BVWE02

    1. Disconnect the B16 headlight ECU sub-assembly LH connector.

    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
      B16-4 (IG) - Body ground LG - Body ground Ignition power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      B16-13 (ECUB) - Body ground G - Body ground Battery power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      B16-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the B16 headlight ECU sub-assembly LH connector.

      Tech Tips


      • Since the B16 headlight ECU sub-assembly LH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

      • Since the B headlight ECU sub-assembly LH connector is connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      B16-11 (TNS) - Body ground W - Body ground Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B16-16 (SBR) - B16-15 (SGR) R - B Rear height control sensor sub-assembly LH power supply Power switch on (IG) 4.75 to 5.25 V
      B16-17 (SHRL) - B16-15 (SGR) P - B Rear height control sensor sub-assembly LH signal input Power switch on (IG), vehicle unloaded, vehicle stopped

      Approximately 2.5 V

      (value decreases as the front of the vehicle is raised)
      B16-21 (LCL) - Body ground W - Body ground CAN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B16-22 (LCH) - Body ground Y - Body ground CAN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B-1 - B-10*1 - Low beam headlights/high beam headlights switching signal output Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-3 - B-4 - Low beam headlights drive output Low beam headlights off Below 1 V
      Low beam headlights on 16.05 to 25.65 V
      B-6 - B-14 - Headlight light signal output Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 - B-17 - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-9 - B-13 - Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B-11 - B-16 - Daytime running lights/clearance lights duty control signal output Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on Pulse generation
      B-15 - B-14 - Headlight fan duty control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation
      B-11 - B-20 - Daytime running lights/clearance lights power source Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on 11 to 14 V
      C-7 - C-8 - High beam headlights drive output Hi beam headlights off Below 1 V
      Hi beam headlights on

      6 to 15 V*1

      16.05 to 25.65 V*2
      C-13 - Body ground - Headlight leveling motor signal output Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation

      • *1: w/ Adaptive High Beam System

      • *2: w/o Adaptive High Beam System

  5. CHECK HEADLIGHT ECU SUB-ASSEMBLY RH (for Triple Beam Headlight)

    B002BKLE02

    1. Disconnect the B15 headlight ECU sub-assembly RH connector.

    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
      B15-4 (IG) - Body ground LG - Body ground Ignition power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      B15-13 (ECUB) - Body ground B - Body ground Battery power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      B15-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the B15 headlight ECU sub-assembly RH connector.

      Tech Tips


      • Since the B15 headlight ECU sub-assembly RH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.

      • Since the B headlight ECU sub-assembly RH connector is connected inside the headlight assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      B15-11 (TNS) - Body ground Y - Body ground Right turn signal light signal input Power switch on (IG), right turn signal light off Below 1 V
      Power switch on (IG), right turn signal light blinking 11 to 14 V ←→ Below 1 V
      B15-21 (LCL) - Body ground W - Body ground CAN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B15-22 (LCH) - Body ground Y - Body ground CAN communication Power switch on (IG) Pulse generation
      Power switch off Below 1 V
      B-1 - B-10*1 - Low beam headlights/high beam headlights switching signal output Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-3 - B-4 - Low beam headlights drive output Low beam headlights off Below 1 V
      Low beam headlights on 16.05 to 25.65 V
      B-6 - B-14 - Headlight light signal output Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 - B-17 - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-9 - B-13 - Left turn signal light signal input Power switch on (IG), left turn signal light off Below 1 V
      Power switch on (IG), left turn signal light blinking 11 to 14 V ←→ Below 1 V
      B-11 - B-16 - Daytime running lights/clearance lights duty control signal output Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on Pulse generation
      B-15 - B-14 - Headlight fan duty control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation
      B-11 - B-20 - Daytime running lights/clearance lights power source Daytime running lights and clearance lights off Below 1 V
      Daytime running lights or clearance lights on 11 to 14 V
      C-7 - C-8 - High beam headlights drive output Hi beam headlights off Below 1 V
      Hi beam headlights on

      6 to 15 V*1

      16.05 to 25.65 V*2
      C-13 - Body ground - Headlight leveling motor signal output Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation

      • *1: w/ Adaptive High Beam System

      • *2: w/o Adaptive High Beam System

  6. CHECK COMBINATION METER ASSEMBLY Click here