LIGHTING SYSTEM TERMINALS OF ECU


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

    B0086F2C06
    *A for LHD *B for RHD

    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
      3B-3 - Body ground LA - Body ground Ground Always Below 1 Ω
      3B-23 - Body ground*3 BE - Body ground Battery power supply Always 11 to 14 V
      3C-1 - Body ground*4 LG - Body ground Battery power supply Always 11 to 14 V
      3F-1 - Body ground*1

      W - Body ground*5

      B - Body ground*6, *7

      		 Battery power supply Always 11 to 14 V
      3G-1 - Body ground*2 W - Body ground Battery power supply Always 11 to 14 V
      K51-19 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω

      • *1: for LHD

      • *2: for RHD

      • *3: w/ Door Control Battery

      • *4: w/o Door Control Battery

      • *5: for Generator 100A Type

      • *6: for Generator 130A Type

      • *7: for Generator 150A Type

    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
      3A-17 - Body ground

      R - Body ground*1

      LA-R - Body ground*2

      		 IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      3A-30 - Body ground LG - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      3A-31 - Body ground V - Body ground Rear door courtesy light switch assembly RH input Rear door RH open Below 1 V
      Rear door RH closed 11 to 14 V
      3A-36 - Body ground*3 W - Body ground Footwell light LH (No. 1 interior illumination light assembly) drive output Footwell light LH (No. 1 interior illumination light assembly) off 11 to 14 V
      Footwell light LH (No. 1 interior illumination light assembly) dimmer control operating (dimming) Pulse generation
      Footwell light LH (No. 1 interior illumination light assembly) at full brightness Below 2.2 V
      3A-37 - Body ground*3 B - Body ground Footwell light RH (No. 1 interior illumination light assembly) drive output Footwell light RH (No. 1 interior illumination light assembly) off 11 to 14 V
      Footwell light RH (No. 1 interior illumination light assembly) dimmer control operating (dimming) Pulse generation
      Footwell light RH (No. 1 interior illumination light assembly) at full brightness Below 2.2 V
      3B-10 - Body ground B - Body ground Map light (roof console box sub-assembly), room light assembly*4, spot light assembly*5 and vanity light assembly power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      3B-12 - Body ground GR - Body ground Front door unlock detection switch RH input Front door RH locked 11 to 14 V
      Front door RH unlocked Below 1 V
      3B-13 - Body ground W - Body ground Front door unlock detection switch LH input Front door LH locked 11 to 14 V
      Front door LH unlocked Below 1 V
      3B-14 - Body ground GR - Body ground Rear door unlock detection switch LH input Rear door LH locked 11 to 14 V
      Rear door LH unlocked Below 1 V
      3B-24 - Body ground*2 LA-LG - Body ground Ignition key cylinder light (transponder key coil) power supply Always 11 to 14 V
      3B-24 - Body ground*6 LG - Body ground Instrument panel ambient illumination light (instrument panel light assembly) power supply Always 11 to 14 V
      3B-25 - Body ground*3 BE - Body ground Footwell light RH (No. 1 interior illumination light assembly) power supply Always 11 to 14 V
      3B-26 - Body ground*7, *8 R - Body ground Front door inside handle illumination light (No. 1 interior illumination light assembly)*7 and rear door inside handle illumination light (No. 2 interior illumination light assembly)*8 power supply Always 11 to 14 V
      3B-27 - Body ground*3 B - Body ground Footwell light LH (No. 1 interior illumination light assembly) power supply Always 11 to 14 V
      3B-29 - Body ground

      G - Body ground*1

      LA-G - Body ground*2

      		 Illuminated entry system drive output Map light LH and map light RH (map light (roof console box sub-assembly))*5, room light assembly*4 and ignition key cylinder light (transponder key coil)*2 off (when operated by illuminated entry system) 11 to 14 V
      Map light LH and map light RH (map light (roof console box sub-assembly))*5, room light assembly*4 and ignition key cylinder light (transponder key coil)*2 on (when operated by illuminated entry system) Below 1 V
      3D-19 - Body ground LA-B - Body ground No. 1 luggage compartment light assembly and courtesy light assembly power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      3D-24 - Body ground G - Body ground Rear door courtesy light switch assembly LH input Rear door LH open Below 1 V
      Rear door LH closed 11 to 14 V
      3D-34 - Body ground LA-GR - Body ground Luggage compartment door courtesy light switch (luggage compartment door lock assembly) input Luggage compartment door open Below 1 V
      Luggage compartment door closed 11 to 14 V
      K51-20 (LSWR) - Body ground L - Body ground Rear door unlock detection switch RH input Rear door RH locked 11 to 14 V
      Rear door RH unlocked Below 1 V
      K52-1 (FLCY) - Body ground W - Body ground Front door courtesy light switch assembly LH input Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      K52-2 (FLCL) - Body ground*9 G - Body ground Courtesy light assembly LH drive output Courtesy light assembly LH off 11 to 14 V
      Courtesy light assembly LH on Below 1 V
      K52-3 (FRCL) - Body ground*9 L - Body ground Courtesy light assembly RH drive output Courtesy light assembly RH off 11 to 14 V
      Courtesy light assembly RH on Below 1 V
      K52-6 (FRCY) - Body ground BE - Body ground Front door courtesy light switch assembly RH input Front door RH open Below 1 V
      Front door RH closed 11 to 14 V
      K52-20 (TCYL) - Body ground GR - Body ground No. 1 luggage compartment light assembly drive output No. 1 luggage compartment light assembly off 11 to 14 V
      No. 1 luggage compartment light assembly on Below 1 V
      K53-20 (LED1) - Body ground*6 W - Body ground Instrument panel ambient illumination light (instrument panel light assembly) drive output Instrument panel ambient illumination light (instrument panel light assembly) off 11 to 14 V
      Instrument panel ambient illumination light (instrument panel light assembly) dimmer control operating (dimming) Pulse generation
      Instrument panel ambient illumination light (instrument panel light assembly) at full brightness Below 2.2 V
      K53-21 (LED2) - Body ground*7, *8 R - Body ground Front door inside handle illumination light (No. 1 interior illumination light assembly)*7 and rear door inside handle illumination light (No. 2 interior illumination light assembly)*8 drive output Front door inside handle illumination light (No. 1 interior illumination light assembly)*7 and rear door inside handle illumination light (No. 2 interior illumination light assembly)*8 off 11 to 14 V
      Front door inside handle illumination light (No. 1 interior illumination light assembly)*7 and rear door inside handle illumination light (No. 2 interior illumination light assembly)*8 dimmer control operating (dimming) Pulse generation
      Front door inside handle illumination light (No. 1 interior illumination light assembly)*7 and rear door inside handle illumination light (No. 2 interior illumination light assembly)*8 at full brightness Below 2.2 V

      • *1: w/ Smart Entry and Start System

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

      • *3: w/ Footwell Light

      • *4: w/ Room Light (for Bulb Type)

      • *5: w/ Room Light (for LED Type)

      • *6: w/ Instrument Panel Ambient Illumination Light

      • *7: w/ Front Door Inside Handle Illumination Light

      • *8: w/ Rear Door Inside Handle Illumination Light

      • *9: w/ Courtesy Light

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

    B0089MBN51

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K62-10 (SWIL) - K62-11 (AGND) W - BE Engine switch illumination drive output Engine switch illumination on 11 to 14 V
      Engine switch illumination off Below 1 V