LIGHTING SYSTEM TERMINALS OF ECU

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

    A011XSWE26

    1. Disconnect the 3A, 3B, 3D, 3E and I12 instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

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

      Terminal No. Wiring Color Terminal Description Condition Specified Condition
      3B-23 - Body ground W - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      3A-27 - Body ground P - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      3D-31 - Body ground V - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      3E-1 - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V

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

    3. Measure the resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      3B-7 - Body ground W-B - Body ground Ground Always Below 1 Ω
      I12-3 (GND2) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    4. Reconnect the 3A, 3B, 3D, 3E and I12 instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

    5. 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-23 - Body ground L - Body ground Light cut relay drive output Light cut relay off 11 to 14 V
      Light cut relay on Below 1 V
      3B-35 - Body ground LG - Body ground Interior lights drive output Power switch off, interior lights off (when operated by illuminated entry system) 11 to 14 V
      Power switch off, interior lights on (when operated by illuminated entry system) Below 1 V
      3B-13 - Body ground LG - Body ground Front door courtesy light LH drive output Power switch off, front door courtesy light LH off 11 to 14 V
      Power switch off, front door courtesy light LH on Below 1 V
      3C-8 - Body ground B - Body ground Luggage compartment room light drive output Power switch off, luggage compartment room light off 11 to 14 V
      Power switch off, luggage compartment room light on Below 1 V
      3C-15 - Body ground L - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      I13-19 (FRCY) - Body ground SB - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed 11 to 14 V
      I13-1 (LCTY) - Body ground P - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      I13-6 (RCTY) - Body ground B - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      Rear door RH closed Pulse generation
      3C-9 - Body ground W - Body ground Luggage compartment door courtesy light switch input Luggage compartment door open Below 1 V
      Luggage compartment door closed 11 to 14 V
      I13-7 (LSFL) - Body ground V - Body ground Front door unlock detection switch LH input Front door LH locked Pulse generation
      Front door LH unlocked Below 1 V
      I13-18 (LSFR) - Body ground W - Body ground Front door unlock detection switch RH input Front door RH locked Pulse generation
      Front door RH unlocked Below 1 V
      3C-17 - Body ground LG - Body ground Rear door unlock detection switch LH input Rear door LH and rear door RH locked Pulse generation
      Rear door LH or rear door RH unlocked Below 1 V
      3A-53 - Body ground Y - Body ground Rear door unlock detection switch RH input Rear door LH and rear door RH locked Pulse generation
      Rear door LH or rear door RH unlocked Below 1 V

      If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel junction block assembly may be malfunctioning.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A011YM3E07

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I87-6 (SWIL) - I86-6 (AGND) P - G Power switch illumination drive output Power switch illumination on 11 to 14 V
      Power switch illumination off Below 1 V

      • If the result is not as specified, the certification ECU (smart key ECU assembly) may be malfunctioning.