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


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

    A002LNZE02

    1. Disconnect the H79, H80, 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
      H79-4 (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-28 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      H80-4 (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 H79, H80, DB, DE and DG ECU connectors.

    4. Measure the voltage according to the value(s) in the table below.

      for LHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      DA-21 (DCTY) - Body ground W - Body ground Front door courtesy light switch LH input Driver side door open Below 1 V
      Driver side door closed 11 to 14 V
      DE-20 (PCTY) - Body ground BR - Body ground Front door courtesy light switch RH input Front passenger side door open Below 1 V
      Front passenger side door closed 11 to 14 V
      H79-8 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Rear door LH closed 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
      Rear door RH closed 11 to 14 V
      DA-7 (BCTY) - Body ground LG - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed 11 to 14 V
      H79-25 (LSWD) - Body ground Y - Body ground Front door lock position switch LH 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)
      H79-10 (LSWP) - Body ground LG - Body ground Front door lock position switch RH 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)
      H81-10 (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)
      H81-6 (PRG) - Body ground Y - Body ground Door control receiver output Key in ignition key cylinder → No key in ignition key cylinder Pulse generation
      H81-5 (RDA) - Body ground G - Body ground Door control receiver input No key in ignition key cylinder, all doors closed and transmitter switch off → on Pulse generation
      for RHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      DC-6 (DCTY) - Body ground BR - Body ground Front door courtesy light switch RH input Driver side door open Below 1 V
      Driver side door closed 11 to 14 V
      DA-24 (PCTY) - Body ground W - Body ground Front door courtesy light switch LH input Front passenger side door open Below 1 V
      Front passenger side door closed 11 to 14 V
      H79-8 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Rear door LH closed 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
      Rear door RH closed 11 to 14 V
      DA-7 (BCTY) - Body ground LG - Body ground Back door courtesy light switch input Back door open Below 1 V
      Back door closed 11 to 14 V
      H79-25 (LSWD) - Body ground LG - Body ground Front door lock position switch RH 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)
      H79-10 (LSWP) - Body ground LG - Body ground Front door lock position switch LH 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)
      H81-10 (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)
      H81-6 (PRG) - Body ground Y - Body ground Door control receiver output Key in ignition key cylinder → No key in ignition key cylinder Pulse generation
      H81-5 (RDA) - Body ground G - Body ground Door control receiver input No key in ignition key cylinder, all doors closed and transmitter switch off → on Pulse generation

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

    5. A002LRUE12

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference)
      Item Content
      Terminal No. (Symbol) H79-25 (LSWD) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and driver side door locked
    6. A002OTRE12

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference)
      Item Content
      Terminal No. (Symbol) H79-25 (LSWD) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and driver side door locked
    7. A002LRUE12

      Using an oscilloscope, check waveform 3.

      Waveform 3 (Reference)
      Item Content
      Terminal No. (Symbol) H79-10 (LSWP) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and front passenger side door locked
    8. A002OTRE12

      Using an oscilloscope, check waveform 4.

      Waveform 4 (Reference)
      Item Content
      Terminal No. (Symbol) H79-10 (LSWP) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and front passenger side door locked
    9. A002LRUE12

      Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference)
      Item Content
      Terminal No. (Symbol) H81-10 (LSR) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and rear door locked
    10. A002OTRE12

      Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference)
      Item Content
      Terminal No. (Symbol) H81-10 (LSR) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and rear door locked