LIGHTING SYSTEM TERMINALS OF ECU


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

    A01IS8UE02
    A01IU45E04

    1. Disconnect the DB, DE and H80 main 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
      DB-30 (BECU) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      DE-28 (GND1) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      H80-4 (GND2) - Body ground W-B - Body ground Body 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 DB, DE and H80 main body 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
      DK-2 (ILE) - DE-28 (GND1) W - W-B Interior light signal Interior light on Below 1 V
      Interior light off 11 to 14 V
      H79-2 (FSPT) - DE-28 (GND1) W-B - W-B No. 1 interior illumination light signal No. 1 interior illumination light illumination on Below 1 V
      No. 1 interior illumination light illumination off 11 to 14 V
      H79-8 (LCTY) - DE-28 (GND1) SB - W-B

      Rear door courtesy light switch signal

      (Rear left door)

      		 Rear left door open Below 1 V
      Rear left door closed 11 to 14 V

      DA-21 (DCTY) - DE-28 (GND1)*1

      DC-6 (DCTY) - DE-28 (GND1)*2

      W - W-B*1

      BR - W-B*2

      Front door courtesy light switch signal

      (Driver side door)

      		 Driver side door open Below 1 V
      Driver side door closed 11 to 14 V
      DE-19 (RCTY) - DE-28 (GND1) LG - W-B

      Rear door courtesy light switch signal

      (Rear right door)

      		 Rear right door open Below 1 V
      Rear right door closed 11 to 14 V

      DE-20 (PCTY) - DE-28 (GND1)*1

      DA-24 (PCTY) - DE-28 (GND1)*2

      BR - W-B*1

      W - W-B*2

      Front door courtesy light switch signal

      (Front passenger side door)

      		 Front passenger side door open Below 1 V
      Front passenger side door closed 11 to 14 V
      DA-7 (BCTY) - DE-28 (GND1) LG - W-B Back door courtesy light switch signal Back door open Below 1 V
      Back door closed 11 to 14 V

      H79-19 (DOMR) - DE-28 (GND1)*1

      H79-3 (DOMR) - DE-28 (GND1)*2

      		 P - W-B Battery saving control (interior light auto cut function) signal Battery saving control (interior light auto cut function) operating 11 to 14 V
      Battery saving control (interior light auto cut function) not operating Below 1 V
      H79-25 (LSWD) - DE-28 (GND1)

      Y - W-B*1

      LG - W-B*2

      Front door unlock detection switch signal

      (Driver side door)

      		 Driver side door locked Pulse generation
      Driver side door unlocked Below 1 V
      H79-10 (LSWP) - DE-28 (GND1) LG - W-B

      Front door unlock detection switch signal

      (Front passenger side door)

      		 Front passenger side door locked Pulse generation
      Front passenger side door unlocked Below 1 V
      H81-10 (LSR) - DE-28 (GND1) Y - W-B LH and RH side rear door unlock detection switch signal LH and RH side rear door locked Pulse generation
      LH or RH side rear door unlocked Below 1 V

      • *1: for LHD

      • *2: for RHD