LIGHTING SYSTEM TERMINALS OF ECU


  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU

    A00483FC25
    *A for LHD *B for RHD
    *1 Instrument Panel Junction Block Assembly *2 Main Body ECU

    1. Remove the main body ECU.

    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
      MB-3 (BCYL) - Body ground - Battery power supply Always 11 to 14 V
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω
      MB-29 (ACC) - Body ground - Ignition power supply (ACC signal) Ignition switch ACC 11 to 14 V
      MB-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      MB-32 (IG)- Body ground - Ignition power supply (IG signal) Ignition switch ON 11 to 14 V

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

    3. Reinstall the main body ECU.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F141-5 (LCTY) - Body ground*1 V - Body ground Rear door LH courtesy light switch input Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      F76-6 (RCTY) - Body ground*1 G - Body ground Rear door RH courtesy light switch input Rear door RH open Below 1 V
      Rear door RH closed Pulse generation
      F76-7 (LSFL) - Body ground

      L - Body ground*3

      R - Body ground*4

      		 Front door LH unlock detection switch signal Front door LH locked Pulse generation
      Front door LH unlocked Below 1 V
      F76-13 (CANL) - Body ground W - Body ground CAN communication Ignition switch ON Pulse generation
      F76-14 (CANH) - Body ground R - Body ground CAN communication Ignition switch ON Pulse generation
      F76-18 (LSFR) - Body ground LG - Body ground Front door RH unlock detection switch signal Front door RH locked Pulse generation
      Front door RH unlocked Below 1 V
      F76-19 (FRCY) - Body ground Y - Body ground Front door courtesy light switch RH signal Front door RH opened Below 1 V
      Front door RH closed Pulse generation
      3A-5 (BCYL) - Body ground SB - Body ground Battery power supply Always 11 to 14 V
      3B-6 (ILE) - Body ground B - Body ground Illumination signal Map light switch in DOOR position and map light assembly turns on Below 1 V
      Map light switch in DOOR position and map light assembly turns off 11 to 14 V
      Footwell light off*2 Below 1 V
      Footwell light on*2 11 to 14 V
      3D-6 (BCTL) - Body ground L - Body ground No. 2 room light power supply Always 11 to 14 V
      3D-24 (LSR) - Body ground*1 Y - Body ground Rear door unlock detection switch signal Rear door LH and RH locked Pulse generation
      Rear door LH or RH unlocked Below 1 V
      3D-25 (LSR) - Body ground*1 V - Body ground Rear door unlock detection switch signal Rear door LH and RH locked Pulse generation
      Rear door LH or RH unlocked Below 1 V
      3B-33 (DOMR) - Body ground P - Body ground DOME relay output signal (to DOME relay) DOME relay off 11 to 14 V
      DOME relay on Below 1 V
      3D-35 (BCTY) - Body ground B - Body ground Back door courtesy switch signal Back door opened Below 1 V
      Back door closed 11 to 14 V
      3D-36 (FLCY) - Body ground L - Body ground Front door courtesy light switch LH signal Front door LH opened Below 1 V
      Front door LH closed Pulse generation

      • *1: for 5 Door

      • *2: w/ Foot Light

      • *3: w/o Automatic Retractable Mirror

      • *4: w/ Automatic Retractable Mirror

      Tech Tips

      If the result is not as specified, the main body ECU or instrument panel junction block assembly may have a malfunction.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A0046W3E05

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F63-16 (SWIL) - Body ground R - Body ground Engine switch illumination drive signal Engine switch illumination on 9 to 14 V
      Engine switch illumination off Below 2 V

      Tech Tips

      If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.