LIGHTING SYSTEM TERMINALS OF ECU


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

    B003YD6N70

    1. Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

    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
      4F-1 - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      4E-1 - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      4B-7 - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Connect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

    4. 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
      4C-15 - Body ground GR - Body ground Parking brake switch input Parking brake switch on Below 1 V
      Parking brake switch off 11 to 14 V
      4C-29 - Body ground R - Body ground H-LP LH relay drive output Power switch on (IG) or light control switch in tail or head position Below 1 V
      Power switch off and light control switch off 11 to 14 V
      4D-12 - Body ground*1 BE - Body ground Rear fog light drive output Light control switch in tail or head position, fog light switch in rear position Below 1 V
      Light control switch in tail or head position, fog light switch off 11 to 14 V
      4D-28 - Body ground V - Body ground Taillight drive output Light control switch in tail or head position 11 to 14 V
      Light control switch off Below 1 V
      K1-4 (MILE) - Body ground*2 LG - Body ground Door mirror foot lights drive output Door mirror foot light operating 11 to 14 V
      Door mirror foot light not operating Below 3 V
      K2-1 (DIM) - Body ground V - Body ground H-LP RH relay drive output Power switch on (IG) or light control switch in tail or head position Below 1 V
      Power switch off and light control switch off 11 to 14 V
      K2-8 (A) - Body ground P - 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
      K2-10 (HF) - Body ground L - Body ground Dimmer switch high flash position signal input Dimmer switch in high flash position Below 1 V
      Dimmer switch not in high flash position Pulse generation
      K2-12 (HEAD) - Body ground Y - Body ground Light control switch head position input Light control switch in head position Below 1 V
      Light control switch not in head position Pulse generation
      K2-19 (CLTB) - K2-21 (CLTE) GR - W Automatic light control sensor power supply output Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      K2-20 (CLTS) - Body ground R - Body ground Automatic light control sensor signal input Power switch off Below 1 V
      Power switch on (IG), light control switch in AUTO position

      Pulse generation

      (See waveform 1)
      K2-22 (TAIL) - Body ground B - Body ground Light control switch tail position signal input Light control switch in tail or head position Below 1 V
      Light control switch not in tail or head position Pulse generation
      K2-23 (RFOG) - Body ground*1 P - Body ground Fog light switch rear position input Fog light switch in rear position Below 1 V
      Fog light switch off Pulse generation
      K2-24 (HU) - Body ground V - Body ground Dimmer switch high position signal input Dimmer switch in high position Below 1 V
      Dimmer switch not in high position Pulse generation

      • *1: w/ Rear Fog Light

      • *2: for Power Mirror Control System (w/o Memory)


      1. A00235GN01

        Waveform 1

        Item Content
        Tester Connection K2-20 (CLTS) - Body ground
        Tool setting 2 V/DIV., 10 ms./DIV.
        Condition Power switch on (IG), light control switch in AUTO position

        Tech Tips

        The communication waveform changes according to the surrounding brightness.

  2. CHECK NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH (for Bulb Type Turn Signal Light)

    A0021DNN24

    1. Disconnect the W1 No. 1 headlight ECU sub-assembly LH connector.

    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      W1-4 (IG) - Body ground B - Body ground Ignition power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      W1-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      W1-13 (ECUB) - Body ground W - Body ground Auxiliary battery power supply Power switch off and light control switch off Below 1 V
      Power switch on (IG) or light control switch in tail or head position 11 to 14 V

    3. Connect the W1 No. 1 headlight ECU sub-assembly LH connector.

      Tech Tips


      • Since the W1 No. 1 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 No. 1 headlight ECU sub-assembly LH connector is a 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
      W1-8 (RLD2) - Body ground G - Body ground Daytime running light/clearance light drive output Daytime running light or clearance light on Below 1 V
      Daytime running light and clearance light off Pulse generation
      W1-11 (TNS) - Body ground G - Body ground LH turn signal light signal input Power switch on (IG), LH turn signal light off Below 1 V
      Power switch on (IG), LH turn signal light blinking 11 to 14 V ←→ Below 1 V
      W1-16 (SBR) - W1-15 (SGR) GR - LG Rear height control sensor power supply Power switch on (IG) 4.75 to 5.25 V
      W1-17 (SHRL) - W1-15 (SGR) G - LG Rear height control sensor signal input Power switch on (IG), vehicle unloaded, vehicle stopped

      Approximately 2.5 V

      (Value decreases as the front of the vehicle is raised)
      W1-20 (LINL) - Body ground LG - Body ground LIN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      W1-23 (CANL) - Body ground B - Body ground CAN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      W1-24 (CANH) - Body ground V - Body ground CAN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      B-1 (HI-) - B-10 (HI+) - High beam headlights drive output High beam headlights off Below 1 V
      High beam headlights on 11 to 14 V
      B-4 (LOLED2) - B-5 (LOLED1) - Low beam headlights/high beam headlights drive output Low beam headlights and high beam headlights off Below 1 V
      Low beam headlights or high beam headlights on 11.2 to 17.7 V
      B-6 (FANB) - B-14 (FANG) - Headlight fan power source Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 (ACTBI) - B-17 (ACTGI) - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-8 (ACTSI) - B-17 (ACTGI) - Headlight leveling motor signal output Power switch on (IG), low beam headlights on, vehicle height not changed Below 1 V
      Power switch on (IG), low beam headlights on, vehicle height changed and maintained for more than 3 seconds 1.0 to 14 V
      B-9 (TURN+) - B-13 (TURN-) - Left turn signal light signal output 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-15 (FANP) - B-14 (FANG) - Headlight fan control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation

  3. CHECK NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH (for LED Type Turn Signal Light)

    A0020T8N22

    1. Disconnect the W1 No. 1 headlight ECU sub-assembly LH connector.

    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      W1-4 (IG) - Body ground B - Body ground Ignition power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      W1-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      W1-13 (ECUB) - Body ground W - Body ground Auxiliary battery power supply Power switch off and light control switch off Below 1 V
      Power switch on (IG) or light control switch in tail or head position 11 to 14 V

    3. Connect the W1 No. 1 headlight ECU sub-assembly LH connector.

      Tech Tips


      • Since the W1 No. 1 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 and C No. 1 headlight ECU sub-assembly LH connectors are 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
      W1-8 (RLD2) - Body ground G - Body ground Daytime running light/clearance light drive output Daytime running light or clearance light on Below 1 V
      Daytime running light and clearance light off Pulse generation
      W1-11 (TNS) - Body ground G - Body ground LH turn signal light signal input Power switch on (IG), LH turn signal light off Below 1 V
      Power switch on (IG), LH turn signal light blinking 11 to 14 V ←→ Below 1 V
      W1-16 (SBR) - W1-15 (SGR) GR - LG Rear height control sensor power supply Power switch on (IG) 4.75 to 5.25 V
      W1-17 (SHRL) - W1-15 (SGR) G - LG Rear height control sensor signal input Power switch on (IG), vehicle unloaded, vehicle stopped

      Approximately 2.5 V

      (Value decreases as the front of the vehicle is raised)
      W1-20 (LINL) - Body ground LG - Body ground LIN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      W1-23 (CANL) - Body ground B - Body ground CAN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      W1-24 (CANH) - Body ground V - Body ground CAN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      B-4 (LOLED2) - B-5 (LOLED1) - Low beam headlights drive output Low beam headlights off Below 1 V
      Low beam headlights on 16 to 25.7 V
      B-6 (FANB) - B-14 (FANG) - Headlight fan power source Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 (ACTBI) - B-17 (ACTGI) - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-8 (ACTSI) - B-17 (ACTGI) - Headlight leveling motor signal output Power switch on (IG), low beam headlights on, vehicle height not changed Below 1 V
      Power switch on (IG), low beam headlights on, vehicle height changed and maintained for more than 3 seconds 1.0 to 14 V
      B-9 (TURN+) - B-13 (TURN-) - Left turn signal light signal output 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-15 (FANP) - B-14 (FANG) - Headlight fan control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation
      C-8 (HILED2) - C-9 (HILED1) - High beam headlights drive output High beam headlights off Below 1 V
      High beam headlights on 11 to 14 V

  4. CHECK NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH (for Bulb Type Turn Signal Light)

    A0021DNN25

    1. Disconnect the G1 No. 1 headlight ECU sub-assembly RH connector.

    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G1-4 (IG) - Body ground B - Body ground Ignition power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      G1-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G1-13 (ECUB) - Body ground G - Body ground Auxiliary battery power supply Power switch off and light control switch off Below 1 V
      Power switch on (IG) or light control switch in tail or head position 11 to 14 V

    3. Connect the G1 No. 1 headlight ECU sub-assembly RH connector.

      Tech Tips


      • Since the G1 No. 1 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 No. 1 headlight ECU sub-assembly RH connector is a 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
      G1-8 (RLD2) - Body ground G - Body ground Daytime running light/clearance light drive output Daytime running light or clearance light on Below 1 V
      Daytime running light and clearance light off Pulse generation
      G1-11 (TNS) - Body ground R - Body ground RH turn signal light signal input Power switch on (IG), RH turn signal light off Below 1 V
      Power switch on (IG), RH turn signal light blinking 11 to 14 V ←→ Below 1 V
      G1-20 (LINL) - Body ground LG - Body ground LIN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      B-1 (HI-) - B-10 (HI+) - High beam headlights drive output High beam headlights off Below 1 V
      High beam headlights on 11 to 14 V
      B-4 (LOLED2) - B-5 (LOLED1) - Low beam headlights/high beam headlights drive output Low beam headlights and high beam headlights off Below 1 V
      Low beam headlights or high beam headlights on 11.2 to 17.7 V
      B-6 (FANB) - B-14 (FANG) - Headlight fan power source Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 (ACTBI) - B-17 (ACTGI) - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-8 (ACTSI) - B-17 (ACTGI) - Headlight leveling motor signal output Power switch on (IG), low beam headlights on, vehicle height not changed Below 1 V
      Power switch on (IG), low beam headlights on, vehicle height changed and maintained for more than 3 seconds 1.0 to 14 V
      B-9 (TURN+) - B-13 (TURN-) - Right turn signal light signal output 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
      B-15 (FANP) - B-14 (FANG) - Headlight fan control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation

  5. CHECK NO. 1 HEADLIGHT ECU SUB-ASSEMBLY RH (for LED Type Turn Signal Light)

    A0020T8N23

    1. Disconnect the G1 No. 1 headlight ECU sub-assembly RH connector.

    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

      Terminal No.(Symbol) Wiring Color Terminal Description Condition Specified Condition
      G1-4 (IG) - Body ground B - Body ground Ignition power supply Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      G1-12 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G1-13 (ECUB) - Body ground G - Body ground Auxiliary battery power supply Power switch off and light control switch off Below 1 V
      Power switch on (IG) or light control switch in tail or head position 11 to 14 V

    3. Connect the G1 No. 1 headlight ECU sub-assembly RH connector.

      Tech Tips


      • Since the G1 No. 1 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 and C No. 1 headlight ECU sub-assembly RH connectors are 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
      G1-8 (RLD2) - Body ground G - Body ground Daytime running light/clearance light drive output Daytime running light or clearance light on Below 1 V
      Daytime running light and clearance light off Pulse generation
      G1-11 (TNS) - Body ground R - Body ground RH turn signal light signal input Power switch on (IG), RH turn signal light off Below 1 V
      Power switch on (IG), RH turn signal light blinking 11 to 14 V ←→ Below 1 V
      G1-20 (LINL) - Body ground LG - Body ground LIN communication Power switch off Below 1 V
      Power switch on (IG) Pulse generation
      B-4 (LOLED2) - B-5 (LOLED1) - Low beam headlights drive output Low beam headlights off Below 1 V
      Low beam headlights on 16 to 25.7 V
      B-6 (FANB) - B-14 (FANG) - Headlight fan power source Low beam headlights off Below 1 V
      Low beam headlights on 4.5 to 5.5 V
      B-7 (ACTBI) - B-17 (ACTGI) - Headlight leveling motor power source Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      B-8 (ACTSI) - B-17 (ACTGI) - Headlight leveling motor signal output Power switch on (IG), low beam headlights on, vehicle height not changed Below 1 V
      Power switch on (IG), low beam headlights on, vehicle height changed and maintained for more than 3 seconds 1.0 to 14 V
      B-9 (TURN+) - B-13 (TURN-) - Right turn signal light signal output 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
      B-15 (FANP) - B-14 (FANG) - Headlight fan control signal input Low beam headlights off Below 1 V
      Low beam headlights on Pulse generation
      C-8 (HILED2) - C-9 (HILED1) - High beam headlights drive output High beam headlights off Below 1 V
      High beam headlights on 11 to 14 V

  6. CHECK COMBINATION METER ASSEMBLY

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  7. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH (for Power Mirror Control System (w/ Memory))

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  8. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY RH (for Power Mirror Control System (w/ Memory))

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