LIGHTING SYSTEM TERMINALS OF ECU


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

    A01RKTGC21
    *A Main Body ECU (Multiplex Network Body ECU) with 1 Connectors - -
    B004PLRC15
    *A Main Body ECU (Multiplex Network Body ECU) with 2 Connectors - -

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

    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
      3F-1 - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      3K-1 - Body ground B-R - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      3D-3 - 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.

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

    4. 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-30 - Body ground R - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      3A-17 - Body ground L - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      3D-25 - Body ground GR - Body ground Footwell light RH power supply Power switch off 11 to 14 V
      3D-24 - Body ground P - Body ground Footwell light LH power supply Power switch off 11 to 14 V
      3H-19 - Body ground R - Body ground No. 1 luggage compartment light, courtesy light LH and courtesy light RH power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      3D-9 - Body ground R - Body ground Map light assembly, No. 1 room light and vanity lights power supply DOME CUT relay on 11 to 14 V
      DOME CUT relay off Below 1 V
      3D-29 - Body ground V - 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
      3H-24 - Body ground BR - Body ground Rear door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed 11 to 14 V
      3A-31 - Body ground GR - Body ground Rear door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed 11 to 14 V
      F17-6 (FLCY) - 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
      F17-27 (FRCY) - Body ground L - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed 11 to 14 V
      3D-14 - Body ground LG - Body ground Rear door unlock detection switch LH input Rear door LH locked Pulse generation
      Rear door LH unlocked Below 1 V
      3D-13 - 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
      3D-12 - Body ground V - Body ground Front door unlock detection switch RH input Front door RH locked Pulse generation
      Front door RH unlocked Below 1 V
      F17-25 (BCYL) - Body ground B - Body ground No. 1 luggage compartment light drive output No. 1 luggage compartment light off 11 to 14 V
      No. 1 luggage compartment light on Below 1 V
      3H-34 - Body ground SB - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed 11 to 14 V
      3A-36 - Body ground G - Body ground Footwell light LH output Footwell light LH off 11 to 14 V
      Footwell light LH at full brightness Below 2.2 V
      3A-37 - Body ground W - Body ground Footwell light RH output Footwell light RH off 11 to 14 V
      Footwell light RH 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)

    A01RJ44N17

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F1-10 (SWIL) - F1-11 (AGND) P - W 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.