LIGHTING SYSTEM TERMINALS OF ECU


  1. CHECK COWL SIDE JUNCTION BLOCK LH, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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    Text in Illustration
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) from the cowl side junction block LH Click here.

    2. Connect the cowl side junction block LH connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-32 (IG) - Body ground - Ignition power supply Power switch on (IG) 11 to 14 V
      A-30 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-29 (ACC) - Body ground - ACC power supply Power switch on (ACC) 11 to 14 V
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction in the wire harness or passenger side junction block.

    4. Install the main body ECU (multiplex network body ECU) Click here.

    5. Measure the voltage and pulse according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      N13-1 (RCYL) - Body ground GR - Body ground Rear courtesy light RH signal Rear courtesy light RH off 11 to 14 V
      Rear courtesy light RH on Below 1 V
      N13-2 (LSWR) - Body ground

      • B - Body ground*2

      • P - Body ground*3

      		 Rear door unlock detection switch RH signal Front door RH unlocked Below 1 V
      Power switch off, all doors closed and rear door RH locked 11 to 14 V
      N13-20 (FSPT) - Body ground R - Body ground Interior foot light and door illumination signal Rear door inside handle illumination light, No. 1 interior illumination light (rear door ambient light), front interior foot lights and No. 1 interior illumination light (rear interior foot light) off 11 to 14 V
      Rear door inside handle illumination light, No. 1 interior illumination light (rear door ambient light), front interior foot lights and No. 1 interior illumination light (rear interior foot light) on Below 1 V
      N12-6 (RCTY) - Body ground G - Body ground Rear door courtesy light switch RH signal Rear door RH open Below 1 V
      Rear door RH closed Pulse generation
      N12-7 (LSFL) - Body ground SB - Body ground Front door unlock detection switch LH signal Front door LH unlocked Below 1 V
      Power switch off, all doors closed and front door LH locked Pulse generation
      N12-18 (LSFR) - Body ground SB - Body ground Front door unlock detection switch RH signal Front door RH unlocked Below 1 V
      Power switch off, all doors closed and front door RH locked Pulse generation
      N12-19 (LGCY) - Body ground*1 P - Body ground Luggage door courtesy light switch signal Luggage compartment door open Below 1 V
      Luggage compartment door closed 11 to 14 V
      N11-2 (DOMR) - Body ground Y - Body ground Battery saving control signal Battery saving control for map light, spot light and vanity light operating 11 to 14 V
      Battery saving control for map light, spot light and vanity light not operating Below 1 V
      N11-3 (LCTY) - Body ground G - Body ground Rear door courtesy light switch LH signal Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      N11-4 (LCYL) - Body ground GR - Body ground Rear courtesy light LH signal Rear courtesy light LH off 11 to 14 V
      Rear courtesy light LH on Below 1 V
      N11-5 (PANL) - Body ground V - Body ground Instrument panel illumination signal Headlight dimmer switch in TAIL Below 1 V
      Headlight dimmer switch off 11 to 14 V
      N11-12 (TCYL) - Body ground*1 B - Body ground No. 1 luggage compartment light signal No. 1 luggage compartment light off 11 to 14 V
      No. 1 luggage compartment light on Below 1 V
      5A-27 (ILE) - Body ground SB - Body ground Map light and spot light signal Map light and spot light on using illuminated entry system Below 1 V
      Map light and spot light off using illuminated entry system 11 to 14 V
      5A-33 (FRCY) - Body ground R - Body ground Front door courtesy light switch RH signal Front door RH open Below 1 V
      Front door RH closed Pulse generation
      5A-4 - Body ground L - Body ground Battery saving control signal Battery saving control operating Below 1 V
      Battery saving control not operating 11 to 14 V
      5A-8 - Body ground L - Body ground Battery saving control signal Battery saving control operating Below 1 V
      Battery saving control not operating 11 to 14 V
      5A-9 - Body ground L - Body ground Battery saving control signal Battery saving control operating Below 1 V
      Battery saving control not operating 11 to 14 V
      5A-22 - Body ground L - Body ground Battery saving control signal Battery saving control operating Below 1 V
      Battery saving control not operating 11 to 14 V
      5A-30 - Body ground L - Body ground Battery saving control signal Battery saving control operating Below 1 V
      Battery saving control not operating 11 to 14 V
      5C-30 (LSWL) - Body ground

      • B - Body ground*2

      • GR - Body ground*3

      		 Rear door unlock detection switch LH signal Rear door LH unlocked Below 1 V
      Power switch off, all doors closed and rear door LH locked Pulse generation
      5C-44 (FLCY) - Body ground R - Body ground Front door courtesy light switch LH signal Front door LH open Below 1 V
      Front door LH closed Pulse generation
      5C-38 - Body ground Y - Body ground Battery saving control signal Battery saving control operating Below 1 V
      Battery saving control not operating 11 to 14 V
      5C-39 - Body ground L - Body ground Battery saving control signal Battery saving control operating Below 1 V
      Battery saving control not operating 11 to 14 V
      5C-42 - Body ground L - Body ground Battery saving control signal Battery saving control operating Below 1 V
      Battery saving control not operating 11 to 14 V

      • *1: w/o Power Trunk Lid System

      • *2: for LHD

      • *3: for RHD

  2. CHECK FRONT MULTIPLEX NETWORK DOOR ECU RH

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    1. Disconnect the Q4 front multiplex network door ECU RH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Q4-6 (BDR) - Body ground V - Body ground Battery power supply Always 11 to 14 V
      Q4-4 (CPUB) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      Q4-16 (BCUT) - Body ground* L- Body ground Battery power supply Always 11 to 14 V
      Q4-3 (SIG) - Body ground B - Body ground Ignition power supply Power switch on (IG) 11 to 14 V
      Q4-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

      • *: for RHD

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

    3. Reconnect the Q4 front multiplex network door ECU RH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Q4-10 (LED+) - Q4-11 (LED-) Y - W Front door inside handle illumination light RH signal Front door inside handle illumination light RH on 11 to 14 V
      Front door inside handle illumination light RH off Below 1 V
      Q4-12 (IL1+) - Q3-21 (Il1-) P - SB No. 1 interior illumination light RH (front door ambient light) signal No. 1 interior illumination light RH (front door ambient light) on 11 to 14 V
      No. 1 interior illumination light RH (front door ambient light) off Below 1 V
      Q4-13 (CYL) - Body ground GR - Body ground Front courtesy light RH signal Front courtesy light RH on Below 1 V
      Front courtesy light RH off 11 to 14 V
      z9-2 (MLP) - z9-12 (-) Y - B-R Door mirror foot light RH signal Door mirror foot light RH on 11 to 14 V
      Door mirror foot light RH off Below 1 V

  3. CHECK FRONT MULTIPLEX NETWORK DOOR ECU LH

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    1. Disconnect the Q19 front multiplex network door ECU LH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Q19-6 (BDR) - Body ground V - Body ground Battery power supply Always 11 to 14 V
      Q19-4 (CPUB) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      Q19-16 (BCUT) - Body ground* W - Body ground Battery power supply Always 11 to 14 V
      Q19-3 (SIG) - Body ground B - Body ground Ignition power supply Power switch on (IG) 11 to 14 V
      Q19-1 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

      • *: for LHD

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

    3. Reconnect the Q19 front multiplex network door ECU LH connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Q19-10 (LED+) - Q19-11 (LED-) Y - W Front door inside handle illumination light LH signal Front door inside handle illumination light LH on 11 to 14 V
      Front door inside handle illumination light LH off Below 1 V
      Q19-12 (IL1+) - Q18-21 (Il1-) P - SB No. 1 interior illumination light LH (front door ambient light) signal No. 1 interior illumination light LH (front door ambient light) on 11 to 14 V
      No. 1 interior illumination light LH (front door ambient light) off Below 1 V
      Q19-13 (CYL) - Body ground GR - Body ground Front courtesy light LH signal Front courtesy light LH on Below 1 V
      Front courtesy light LH off 11 to 14 V
      z10-2 (MLP) - z10-12 (-) Y - B-R Door mirror foot light LH signal Door mirror foot light LH on 11 to 14 V
      Door mirror foot light LH off Below 1 V

  4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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    1. Disconnect the N94 and N95 certification ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      N95-5 (+B) - Body ground GR - Body ground Battery power supply Always 11 to 14 V
      N95-4 (CUTB) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      N95-16 (IG) - Body ground B - Body ground Ignition power supply Power switch on (IG) 11 to 14 V
      N94-1 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    3. Reconnect the N94 and N95 certification ECU connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      N95-6 (SWIL) - Body ground B - Body ground Power switch illumination operation signal Power switch illumination on 11 to 14 V
      Power switch illumination off Below 1 V