LIGHTING SYSTEM TERMINALS OF ECU


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

    B002HZ8C13
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

    2. Connect the instrument panel junction block assembly connectors.

    3. Measure the voltage and resistance 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-31 (BECU) - Body ground - Battery power supply Power switch off 11 to 14 V
      A-30 (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

      If the result is not as specified, there may be a malfunction in the wire harness or instrument panel junction block assembly.

    4. Install the main body ECU (multiplex network body ECU).

      for LHD:

      Click here

      for RHD:

      Click here

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I48-6 (FLCY) - Body ground G - Body ground Front door courtesy light switch LH signal Front door LH open Below 1 V
      Front door LH closed Pulse generation
      I48-27 (FRCY) - Body ground W - Body ground Front door courtesy light switch RH signal Front door RH open Below 1 V
      Front door RH closed Pulse generation
      I47-2 (LSWR) - Body ground Y - Body ground Rear door unlock detection switch RH signal Rear door RH unlocked Below 1 V
      Power switch off, all doors closed and rear door RH locked Pulse generation
      4D-39 (LSFR) - Body ground P - Body ground Front door unlock detection switch RH signal Front door RH unlocked Below 1 V
      Power switch off, all doors closed and front door RH locked Pulse generation
      4D-37 (RCTY) - Body ground Y - Body ground Rear door courtesy light switch RH signal Rear door RH open Below 1 V
      Rear door RH closed Pulse generation
      4A-34 (LSWL) - Body ground Y - Body ground Rear door unlock detection switch LH signal Rear door LH unlocked Below 1 V
      Power switch off, all doors closed and rear door LH locked Pulse generation
      4A-21 (BCTY) - Body ground

      R - Body ground (w/o Power Seat)

      LG - Body ground (w/ Power Seat)

      		 Back door courtesy light switch signal Back door open Below 1 V
      Back door closed 11 to 14 V
      4A-18 (LCTY) - Body ground W - Body ground Rear door courtesy light switch LH signal Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      4D-40 (LSFL) - Body ground B - Body ground Front door unlock detection switch LH signal Front door LH unlocked Below 1 V
      Power switch off, all doors closed and front door LH locked Pulse generation
      4C-46 (DOMR) - Body ground R - Body ground Battery saving control (interior light auto cut function) signal Battery saving control (interior light auto cut function) operating Below 1 V
      Battery saving control (interior light auto cut function) not operating 11 to 14 V
      4C-39 - Body ground B - Body ground Headlight dimmer switch tail signal Headlight dimmer switch in tail position Below 1 V
      Headlight dimmer switch not in tail position 11 to 14 V
      4D-36 (ILE) - Body ground SB - Body ground Map light and spot light signal Map light and spot light on using illuminated entry system Below 1 V
      Map light and spot light off using illuminated entry system 11 to 14 V
      4D-32 (FSPT) - Body ground W - Body ground Interior illumination light LH signal Interior illumination LH light on Below 1 V
      Interior illumination LH light off 11 to 14 V
      4D-33 (FSPT) - Body ground B - Body ground Interior illumination light RH signal Interior illumination RH light on Below 1 V
      Interior illumination RH light off 11 to 14 V
      I47-4 (MILE) - Body ground P - Body ground Door outside handle illumination light signal Door outside handle illumination light on 11 to 14 V
      Door outside handle illumination light off Below 1 V
      I47-27 (DMDR) - Body ground W - Body ground Door switch signal input Door switch on Below 1 V
      Door switch off 11 to 14 V
      I47-28 (DMON) - Body ground B - Body ground Front dome light switch signal input Front dome light switch on Below 1 V
      Front dome light switch off Pulse generation

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B002JM5E08

    1. Disconnect the I53 certification ECU 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
      I53-10 (+B) - Body ground W - Body ground Battery power supply Power switch off 11 to 14 V
      I53-11 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the I53 certification ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I53-17 (SWIL) - I53-12 (AGND) BE - P Power switch illumination operation signal Power switch illumination on 11 to 14 V
      Power switch illumination off Below 1 V