LIGHTING SYSTEM TERMINALS OF ECU


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

    A003WXRE21

    1. Disconnect the 2A, 2B, 2C, 2E and H17 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
      2A-43 - Body ground G - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      2B-4 - Body ground W-B - Body ground Ground Always Below 1 Ω
      2B-25 - Body ground B - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      2C-18 - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V

      2E-1*1 - Body ground

      2F-1*2 - Body ground

      		 W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V

      • *1: for LHD

      • *2: for RHD

      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
      2B-4 - Body ground W-B - Body ground Ground Always Below 1 Ω
      2B-6 - Body ground W-B - Body ground Ground Always Below 1 Ω
      H17-3 (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 2A, 2B, 2C, 2E and H17 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
      2B-17 - Body ground L - Body ground Footwell light RH drive output Footwell light RH off 11 to 14 V
      Footwell light RH on Below 1 V
      2B-18 - Body ground V - Body ground Footwell light LH drive output Footwell light LH off 11 to 14 V
      Footwell light LH on Below 1 V
      2B-27 - Body ground G - Body ground Interior lights drive output Power switch off, interior lights off (illuminated entry system operation) 11 to 14 V
      Power switch off, interior lights on (illuminated entry system operation) Below 1 V
      2D-25 - Body ground GR - Body ground Rear door unlock detection switch LH input Rear door LH locked Pulse generation
      Rear door LH unlocked Below 1 V
      2D-35 - Body ground BR - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      2D-36 - Body ground BR - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed 11 to 14 V
      H16-6 (RCTY) - Body ground G - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      Rear door RH closed 11 to 14 V
      H16-7 (LSFL) - 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
      H16-18 (LSFR) - Body ground SB - Body ground Front door unlock detection switch RH input Front door RH locked Pulse generation
      Front door RH unlocked Below 1 V
      H16-19 (BCTY) - Body ground SB - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed 11 to 14 V
      H17-2 (LSWR) - Body ground GR - Body ground Rear door unlock detection switch RH input Rear door RH locked Pulse generation
      Rear door RH unlocked Below 1 V
      H18-2 (CSPT) - Body ground SB - Body ground Center console spot light (blue) drive output Center console spot light (blue) off Below 1 V
      Center console spot light (blue) on 11 to 14 V
      H18-3 (LCTY) - Body ground G - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      H18-6 (OSPT) - Body ground Y - Body ground Center console spot light (red) drive output Center console spot light (red) off Below 1 V
      Center console spot light (red) on 11 to 14 V
      H18-12 (BCYL) - Body ground SB - Body ground Luggage compartment room light drive output Luggage compartment door open Below 1 V
      Luggage compartment door closed 11 to 14 V

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

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    A003ZGSE68

    1. Disconnect the H1 certification ECU (smart key ECU assembly) connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H1-1 (+B) - Body ground B - Body ground +B 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
      H1-15 (E) - 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 H1 certification ECU (smart key ECU assembly) connector.

    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
      H1-11 (SWIL) - Body ground G - Body ground Power switch illumination drive output Power switch illumination on 11 to 14 V
      Power switch illumination off Below 1 V
      H1-16 (IG) - Body ground BE - Body ground IG power supply Power switch on (IG) 11 to 14 V

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