LIGHTING SYSTEM TERMINALS OF ECU


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

    A003T11E02

    1. Disconnect the 2A, 2B, 2C, 2E*1, 2F*2 and E121*3 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. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2A-43 - Body ground GR - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      2B-25 - Body ground W - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      2C-18 (BECU) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      2E-1*1 - Body ground W - Body ground Battery power supply Always 11 to 14 V
      2F-1*2 - Body ground W - Body ground Battery power supply Always 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
      2B-6 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      E121-3*2 (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*1, 2F*2 and E121*3 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
      2A-52 (ILE) - Body ground L - Body ground Interior lights drive output Interior lights off 11 to 14 V
      Interior lights on Below 1 V
      2B-29 (*2, *4) (LSR) - Body ground Y - Body ground Rear door unlock detection switch RH input Rear door RH and LH locked 11 to 14 V
      Rear door RH or LH unlocked Below 1 V
      2D-25 (*2, *4) (LSR) - Body ground Y - Body ground Rear door unlock detection switch LH input Rear door LH and RH locked 11 to 14 V
      Rear door LH or RH unlocked Below 1 V
      2D-35 (FLCY) - Body ground W - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      2B-31 (FRCY) - 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
      E120-6 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      Rear door RH closed 11 to 14 V
      E120-7 (LSFL) - Body ground Y - Body ground Front door unlock detection switch LH input Front door LH locked 11 to 14 V
      Front door LH unlocked Below 1 V
      E120-18 (LSFR) - Body ground LG - Body ground Front door unlock detection RH switch input Front door RH locked 11 to 14 V
      Front door RH unlocked Below 1 V
      E120-19 (BCTY) - Body ground LG - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed 11 to 14 V
      E120-23 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Rear door RH closed 11 to 14 V

      Tech Tips

      *1: for LHD

      *2: for RHD

      *3: w/ Theft Deterrent System

      *4: w/ Double Locking

      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)


    1. Disconnect the E117 certification ECU (smart key ECU assembly) connector.

      A003SNTE27

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      E117-1 (+B) - Body ground W - Body ground +B power supply Always 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
      E117-17 (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 E117 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
      E117-21 (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

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