THEFT DETERRENT SYSTEM TERMINALS OF ECU


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

    A0052HQE03

    1. Disconnect the D79, D80, D81, 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
      D81-11 (HCTY) - Body ground R - Body ground Engine hood courtesy switch Engine hood closed Below 1 Ω
      Engine hood open 10 kΩ or higher

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the D79, D80, D81, 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 LH courtesy light switch input Rear door LH open Below 1 V
      Ignition switch off and rear LH side door courtesy light switch off 11 to 14 V
      DE-19 (RCTY) - Body ground LG - Body ground Rear door RH courtesy light switch input Rear door RH open Below 1 V
      Ignition switch off and rear RH side door courtesy light switch off 11 to 14 V

      DA-7 (LGCY) - Body ground*3

      DA-7 (BCTY) - Body ground*4

      		 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
      Engine switch off and luggage compartment door*3 or back door*4 closed 11 to 14 V
      DH-7 (L2) - Body ground SB - Body ground Driver side door lock key switch input Driver side door key cylinder lock position Below 1 V
      Ignition switch off, all doors closed and driver side door key cylinder neutral position

      Pulse generation

      (see waveform 1 or 2)
      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 3 or 4)
      D79-10 (LSWP) - 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 5 or 6)
      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 7 or 8)
      D79-12 (BDSU) - Body ground V - Body ground Back door opener switch input Back door opener switch off Below 1 V
      Back door opener switch on Pulse generation (see waveform 9 or 10)
      D79-15 (IND) - Body ground Y - Body ground Security indicator signal Security indicator illuminates (illuminates only for 60 sec. in alarm sounding state (blinking when system in armed state)) 3 to 6 V
      D80-6 (SSCL) - Body ground R - Body ground Theft warning siren (self power siren) signal Theft warning siren (self power siren) sounding (theft warning system in alarm sounding state) Below 2 V
      Theft warning siren (self power siren) not sounding (theft warning system in alarm sounding state) 4.5 to 14 V
      D80-7 (ISIF) - Body ground*5 G - Body ground Intrusion sensor signal input No moving object detected 6.5 to 14 V
      Moving object detected during arming preparation state or armed state Pulse generation (see waveform 11)
      D80-8 (SSW1) - Body ground*5 Y - Body ground Intrusion sensor cancel switch signal Intrusion sensor cancel switch on Below 1.5 V
      Intrusion sensor cancel switch off 4.5 to 14 V
      D81-8 (GBS) - Body ground*6 G - Body ground Glass breakage sensor signal Glass breakage sensor normal Below 2 V
      Glass breakage sensor malfunctioning 4.5 to 14 V

      • *1: for LHD

      • *2: for RHD

      • *3: for Sedan

      • *4: for Wagon

      • *5: w/ Intrusion Sensor

      • *6: w/ Glass Breakage Sensor

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

    5. A00573BE01

      Using an oscilloscope, check waveform 1.

      Waveform 1 (Reference)
      Item Content
      Terminal No. (Symbol) DH-7 (L2) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and driver side door key cylinder neutral position
    6. A0057MRE01

      Using an oscilloscope, check waveform 2.

      Waveform 2 (Reference)
      Item Content
      Terminal No. (Symbol) DH-7 (L2) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and driver side door key cylinder neutral position
    7. A00573BE01

      Using an oscilloscope, check waveform 3.

      Waveform 3 (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
    8. A0057MRE01

      Using an oscilloscope, check waveform 4.

      Waveform 4 (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
    9. A00573BE01

      Using an oscilloscope, check waveform 5.

      Waveform 5 (Reference)
      Item Content
      Terminal No. (Symbol) D79-10 (LSWP) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and passenger side door locked
    10. A0057MRE01

      Using an oscilloscope, check waveform 6.

      Waveform 6 (Reference)
      Item Content
      Terminal No. (Symbol) D79-10 (LSWP) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and passenger side door locked
    11. A00573BE01

      Using an oscilloscope, check waveform 7.

      Waveform 7 (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 RH locked
    12. A0057MRE01

      Using an oscilloscope, check waveform 8.

      Waveform 8 (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 RH locked
    13. A0059KKE01

      Using an oscilloscope, check waveform 9.

      Waveform 9 (Reference)
      Item Content
      Terminal No. (Symbol) D79-12 (BDSU) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and back door opener switch on
    14. A0058CGE01

      Using an oscilloscope, check waveform 10.

      Waveform 10 (Reference)
      Item Content
      Terminal No. (Symbol) D79-12 (BDSU) - Body ground
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition Ignition switch off, all doors closed and back door opener switch on
    15. A0056AAE01

      Using an oscilloscope, check waveform 11.

      Waveform 11 (Reference)
      Item Content
      Terminal No. (Symbol) D80-7 (ISIF) - Body ground
      Tool Setting 2 V/DIV., 500 ms/DIV.
      Condition Moving object detected during arming preparation state or armed state