LIGHTING SYSTEM TERMINALS OF ECU


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

    A004PSQE02
    A004RROE02

    1. Disconnect the DE, DH 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
      DH-12 (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 DE, DH 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
      DK-2 (ILE) - DE-17 (GND1) W - W-B Map light and No. 1 room light signal Battery saving control (interior light auto cut function) not operating, map light and No. 1 room light on using illuminated entry system Below 1 V
      Battery saving control (interior light auto cut function) not operating, map light and No. 1 room light off using illuminated entry system 11 to 14 V
      D79-2 (FSPT) - DE-17 (GND1)*1 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
      D79-3 (DOMR) - DE-17 (GND1)*2,*3 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
      D79-8 (LCTY) - DE-17 (GND1) SB - W-B

      Courtesy light switch signal

      (Rear left door circuit)

      		 Rear left door closed 11 to 14 V
      Rear left door open Below 1 V
      D79-19 (DOMR) - DE-17 (GND1)*4,*5 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

      DA-21 (DCTY) - DE-17 (GND1)*6

      DC-6 (DCTY) - DE-17 (GND1)*7

      W - W-B

      SB - W-B

      Courtesy light switch signal

      (Driver side door circuit)

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

      Courtesy light switch signal

      (Rear right door circuit)

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

      DE-20 (PCTY) - DE-17 (GND1)*6

      DA-24 (PCTY) - DE-17 (GND1)*7

      Y - W-B

      W - W-B

      Courtesy light switch signal

      (Passenger side door circuit)

      		 Passenger side door closed 11 to 14 V
      Passenger side door open Below 1 V

      DA-7 (BCTY) - DE-17 (GND1)*8

      DA-7 (LGCY) - DE-17 (GND1)*9

      		 LG - W-B

      Courtesy light switch signal

      (Back door circuit [for Wagon])

      (Luggage compartment door circuit [for Sedan])

      Back door closed (for Wagon)

      Luggage compartment door closed (for Sedan)

      		 11 to 14 V

      Back door open (for Wagon)

      Luggage compartment door is open (for Sedan)

      		 Below 1 V

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

      • *2: except LHD Vehicles: w/o Power Tilt and Power Telescopic Steering Column System

      • *3: except RHD Vehicles: w/o Theft Deterrent System

      • *4: for LHD Vehicles: w/o Power Tilt and Power Telescopic Steering Column System

      • *5: for RHD Vehicles: w/o Theft Deterrent System

      • *6: for LHD

      • *7: for RHD

      • *8: for Wagon

      • *9: for Sedan