WIRELESS DOOR LOCK CONTROL SYSTEM(w/o Entry and Start System) TERMINALS OF ECU


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

    A004TMTE02

    1. Disconnect the D79, D80, DB, DE and DG 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
      D79-4 (BATB) - Body ground BR - Body ground Battery power supply Always 11 to 14 V
      DG-1 (ALTB) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      DB-30 (BECU) - Body ground W - Body ground Power supply Always 11 to 14 V
      DE-17 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      D80-4 (GND2) - 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 D79, D80, DB, DE and DG 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

      DA-21 (DCTY)*1 - Body ground

      DC-6 (DCTY)*2 - Body ground

      W*1 - Body ground

      SB*2 - Body ground

      		 Driver side door courtesy light switch input Driver side door open Below 1 V
      Ignition switch off and driver side door courtesy light switch off 11 to 14 V

      DE-20 (PCTY)*1 - Body ground

      DA-24 (PCTY)*2 - Body ground

      Y*1 - Body ground

      W*2 - Body ground

      		 Front passenger side door courtesy light switch input Front passenger side door open Below 1 V
      Ignition switch off and passenger side door courtesy light switch off 11 to 14 V
      D79-8 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Ignition switch off and rear door courtesy light switch LH off 11 to 14 V
      DE-19 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      Ignition switch off and rear door courtesy light switch RH off 11 to 14 V
      DA-7 (BCTY) - Body ground LG - Body ground Luggage compartment door*3 or back door*4 courtesy light switch input Luggage compartment door*3 or back door*4 open Below 1 V
      Ignition switch off and luggage compartment door*3 or back door*4 closed 11 to 14 V
      D79-25 (LSWD) - Body ground GR - Body ground Driver side door lock position switch input Driver side door unlocked Below 1 V
      Ignition switch off, all doors closed and driver side door locked

      Pulse generation

      (see waveform 1 or 2)
      D79-10 (LWSP) - Body ground LG - Body ground Front passenger side door lock position switch input Front passenger side door unlocked Below 1 V
      Ignition switch off, all doors closed and passenger side door locked

      Pulse generation

      (see waveform 3 or 4)
      D81-10 (LSR) - Body ground Y - Body ground Rear door lock position switch input Rear door unlocked Below 1 V
      Ignition switch off, all doors closed and rear door locked

      Pulse generation

      (see waveform 5 or 6)
      D81-6 (PRG) - Body ground Y - Body ground Door control receiver output Key in ignition key cylinder → No key in ignition key cylinder Pulse generation
      D81-5 (RDA) - Body ground G - Body ground Door control receiver input Transmitter switch on → off (No key in ignition key cylinder, all doors closed) Pulse generation

      • *1: for LHD

      • *2: for RHD

      • *3: for Sedan

      • *4: for Wagon

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

    5. A004UE9E01

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference)
      Item Content
      Terminal No. (Symbol) D79-25 (LSWD) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and driver side door locked
    6. A004O4AE01

      Using an oscilloscope, check waveform 2

      Waveform 2 (Reference)
      Item Content
      Terminal No. (Symbol) D79-25 (LSWD) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and driver side door locked
    7. A004UE9E01

      Using an oscilloscope, check waveform 3.

      Waveform 3 (Reference)
      Item Content
      Terminal No. (Symbol) D79-10 (LWSP) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and passenger side door locked
    8. A004O4AE01

      Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference)
      Item Content
      Terminal No. (Symbol) D79-10 (LWSP) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and passenger side door locked
    9. A004UE9E01

      Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference)
      Item Content
      Terminal No. (Symbol) D81-10 (LSR) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and rear door locked
    10. A004O4AE01

      Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference)
      Item Content
      Terminal No. (Symbol) D81-10 (LSR) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and rear door locked