LIGHTING SYSTEM TERMINALS OF ECU


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

    B004FQWC44
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

    2. Measure the voltage on the wire harness side connector according to the value(s) in the table below.

      Terminal No. Wiring Color Terminal Description Condition Specified Condition
      4E-1 - Body ground B - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      4F-1 - Body ground B - 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 on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      4B-7 - 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 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
      4B-19 - Body ground P - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      4C-22 - Body ground V - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      4D-27 - Body ground W - Body ground Ambient illumination light LH power supply Power switch off 11 to 14 V
      4B-15 - Body ground B - Body ground Ambient illumination light RH power supply Power switch off 11 to 14 V
      4D-31 - Body ground L - Body ground Courtesy light LH and No. 1 luggage compartment light power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      4B-18 - Body ground L - Body ground No. 1 interior illumination lights and courtesy light RH power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      4B-16 - Body ground R - Body ground Map light assembly and vanity lights power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      4B-10 - Body ground LG - Body ground Interior lights drive output Interior lights off (when operated by illuminated entry system) 11 to 14 V
      Interior lights on (when operated by illuminated entry system) Below 1 V
      4B-11 - Body ground R - Body ground Footwell lights drive output Footwell lights off (when operated by illuminated entry system) 11 to 14 V
      Footwell lights on (when operated by illuminated entry system) Below 1 V
      O1-27 (DMDR) - Body ground L - Body ground Door switch signal input Door switch on Below 1 V
      Door switch off Pulse generation
      O1-28 (DMON) - Body ground W - Body ground Front dome light switch signal input Front dome light switch on Below 1 V
      Front dome light switch off Pulse generation
      O2-25 (TCYL) - Body ground R - Body ground Luggage compartment room light drive input No. 1 luggage compartment light off 11 to 14 V
      No. 1 luggage compartment light on Below 1 V
      O2-6 (FLCY) - Body ground V - Body ground Front door courtesy light switch LH input Door LH open Below 1 V
      Door LH closed 11 to 14 V
      O2-27 (FRCY) - Body ground V - Body ground Front door courtesy light switch RH input Door RH open Below 1 V
      Door RH closed 11 to 14 V
      4D-16 - Body ground G - Body ground Luggage compartment door courtesy switch input Luggage compartment door open Below 1 V
      Luggage compartment door closed 11 to 14 V
      4B-26 - Body ground G - Body ground Door unlock detection switch LH input Door LH locked Pulse generation
      Door LH unlocked Below 1 V
      4B-27 - Body ground B - Body ground Door unlock detection switch RH input Door RH locked Pulse generation
      Door RH unlocked Below 1 V
      O1-17 (FRCL) - Body ground G - Body ground Courtesy light RH drive output Courtesy light RH off 11 to 14 V
      Courtesy light RH on Below 1 V
      O1-1 (FLCL) - Body ground V - Body ground Courtesy light LH drive output Courtesy light LH off 11 to 14 V
      Courtesy light LH on Below 1 V
      O1-21 (LED1) - Body ground W - Body ground Ambient illumination light output Ambient illumination light off 11 to 14 V
      Ambient illumination light dimmer control operating (dimming) Pulse generation
      Ambient illumination light at full brightness Below 2.2 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)

    B004EF5N59

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      O6-17 (SWIL) - O6-12 (AGND) R - LG 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.