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
      DE-27 (ILE) - DE-28 (GND1) W-B - W-B Door mirror foot light signal Illumination on Below 1 V
      Illumination off 11 to 14 V
      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

      Courtesy light switch signal

      (Rear left door circuit)

      		 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

      Courtesy light switch signal

      (Driver side door circuit)

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

      Courtesy light switch signal

      (Rear right door circuit)

      		 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

      Courtesy light switch signal

      (Front passenger side door circuit)

      		 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

      Courtesy light switch signal

      (Back door)

      		 Back door open Below 1 V
      Back door closed 11 to 14 V
      H79-25 (LSWD) - DE-28 (GND1)

      Y - W-B*1

      LG - W-B*2

      Door lock position switch signal

      (Driver side door)

      		 Driver side door locked Below 1 V
      Driver side door unlocked 11 to 14 V

      • *1: for LHD

      • *2: for RHD

      • If the result is not as specified, the main body ECU may have a malfunction.