LIGHTING SYSTEM TERMINALS OF ECU


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

    A003DW6E02
    A003E0TE02

    1. Disconnect the DB, DE and D80 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-17 (GND1) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      D80-4 (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 D80 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-17 (GND1)*3 W-B - W-B Transponder key amplifier illumination signal Illumination on Below 1 V
      Illumination off 11 to 14 V
      DK-2 (ILE) - DE-17 (GND1) W - W-B Interior light signal Interior light on Below 1 V
      Interior light on 11 to 14 V
      D79-2 (FSPT) - DE-17 (GND1)*4 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
      D79-8 (LCTY) - DE-17 (GND1) SB - W-B

      Courtesy light switch signal

      (Rear left door circuit)

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

      DA-21 (DCTY) - DE-17 (GND1)*1

      DC-6 (DCTY) - DE-17 (GND1)*2

      W - W-B

      SB - W-B

      Courtesy light switch signal

      (Driver side door circuit)

      		 Driver side door closed Below 1 V
      Driver side door open 11 to 14 V
      DE-19 (RCTY) - DE-17 (GND1) LG - W-B

      Courtesy light switch signal

      (Rear right door circuit)

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

      DE-20 (PCTY) - DE-17 (GND1)*1

      DA-24 (PCTY) - DE-17 (GND1)*2

      Y - W-B

      W - W-B

      Courtesy light switch signal

      (Passenger side door circuit)

      		 Passenger side door closed Below 1 V
      Passenger side door open 11 to 14 V
      DA-7 (BCTY) - DE-17 (GND1) LG - W-B

      Courtesy light switch signal

      (Back door [for Wagon])

      (Luggage compartment door [for Sedan])

      Back door closed (for Wagon)

      Luggage compartment door closed (for Sedan)

      		 Below 1 V

      Back door open (for Wagon)

      Luggage compartment door is open (for Sedan)

      		 11 to 14 V
      D79-25 (LSWD) - DE-17 (GND1) GR - W-B

      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

      • *3: w/o Entry and Start System

      • *4: w/ No. 1 Interior Illumination Light

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