LIGHTING SYSTEM TERMINALS OF ECU


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

    B00403HC06
    *A Main Body ECU (Multiplex Network Body ECU) with 2 Connectors - -
    *1 Main Body ECU (Multiplex Network Body ECU) - -
    *a 2 Connectors - -
    B003Z6CC06
    *A Main Body ECU (Multiplex Network Body ECU) with 3 Connectors - -
    *1 Main Body ECU (Multiplex Network Body ECU) - -
    *a 3 Connectors - -

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

    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
      4A-27 - Body ground W-B - Body ground Ground Always Below 1 Ω
      4D-11 - Body ground LA - Body ground Ground Always Below 1 Ω
      4F-32 - Body ground BE - Body ground Battery power supply Always 11 to 14 V
      4K-1 - Body ground B - Body ground Battery power supply Always 11 to 14 V
      4L-1 - Body ground G - Body ground DOME CUT relay power supply Always 11 to 14 V

    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
      4A-16 - Body ground G - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      4A-28 - Body ground GR - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      4A-48 - Body ground B - Body ground Battery power supply Always 11 to 14 V
      4D-7 - Body ground LA-G - Body ground Interior lights power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      4D-9 - Body ground*1 LA-W - Body ground Ambient lights drive output Ambient lights off (when operated by illuminated entry system) 11 to 14 V
      Ambient lights on (when operated by illuminated entry system) Below 1 V
      Ambient lights dimmer control operating (when operated by illuminated entry system) Pulse generation
      4D-10 - Body ground GR - Body ground Front door unlock detection switch LH input Front door LH locked Pulse generation
      Front door LH unlocked Below 1 V
      4D-12 - Body ground LA-W - Body ground Interior lights drive output Interior lights off (when operated by illuminated entry system) 11 to 14 V
      Interior lights on (when operated by illuminated entry system) Below 1 V
      4D-13 - Body ground*2 LA-W - Body ground Ignition key cylinder light drive output Ignition key cylinder light off (when operated by illuminated entry system) 11 to 14 V
      Ignition key cylinder light on (when operated by illuminated entry system) Below 1 V
      4D-23 - Body ground BE - Body ground Battery power supply Always 11 to 14 V
      4D-26 - Body ground Y - Body ground Front door unlock detection switch RH input Front door RH locked Pulse generation
      Front door RH unlocked Below 1 V
      4D-30 - Body ground LG - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      Rear door RH closed Pulse generation
      4D-31 - Body ground*1 L - Body ground Ambient lights power supply Always 11 to 14 V
      4D-32 - Body ground R - Body ground Interior illumination power supply TAIL relay off Below 1 V
      TAIL relay on 11 to 14 V
      4F-19 - Body ground B - Body ground IG signal output Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      4F-24 - Body ground B - Body ground IG signal input Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      4H-5 - Body ground LA-G - Body ground No. 1 room light power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      4H-21 - Body ground R - Body ground Interior illumination power supply TAIL relay off Below 1 V
      TAIL relay on 11 to 14 V
      4H-22 - Body ground*1 L - Body ground Ambient light power supply Always 11 to 14 V
      4H-27 - Body ground*1 W - Body ground Ambient light drive output Ambient lights off (when operated by illuminated entry system) 11 to 14 V
      Ambient light on (when operated by illuminated entry system) Below 1 V
      Ambient light dimmer control operating (when operated by illuminated entry system) Pulse generation
      4H-33 - Body ground LA-Y - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed Pulse generation
      4H-34 - Body ground V - Body ground Rear door unlock detection switch LH input Rear door LH locked Pulse generation
      Rear door LH unlocked Below 1 V
      4H-36 - Body ground SB - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      F18-1 (FLCL) - Body ground B - Body ground Courtesy light LH drive output Courtesy light LH off 11 to 14 V
      Courtesy light LH on Below 1 V
      F18-2 (LSWR) - Body ground LG - Body ground Rear door unlock detection switch RH input Rear door RH locked Pulse generation
      Rear door RH unlocked Below 1 V
      F18-17 (FRCL) - Body ground W - Body ground Courtesy light LH drive output Courtesy light RH off 11 to 14 V
      Courtesy light RH on Below 1 V
      F18-27 (GCTY) - Body ground*3 R - Body ground Back door glass courtesy light switch input Glass hatch open Below 1 V
      Glass hatch closed Pulse generation
      F19-6 (FLCY) - Body ground GR - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      F19-27 (FRCY) - Body ground L - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed 11 to 14 V

      • *1: w/ Ambient Light

      • *2: w/o Smart Entry and Start System

      • *3: w/ Power Back Door System

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Entry and Start System)

    B003ZN2N20

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F13-17 (SWIL) - F13-12 (AGND) P - W Engine switch illumination drive output Engine switch illumination on 11 to 14 V
      Engine switch illumination off Below 1 V

  3. CHECK MULTIPLEX NETWORK DOOR ECU (w/ Power Back Door System)

    B003ZYLN03

    1. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      X6-19 (FUL) - Body ground L - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed 11 to 14 V
      X7-5 (CTYO) - Body ground L - Body ground No. 1 room light drive output No. 1 room light off 11 to 14 V
      No. 1 room light on Below 1 V