ENTRY AND START SYSTEM (for Entry Function) TERMINALS OF ECU


  1. CHECK CERTIFICATION ECU


    1. Disconnect the H51 ECU connector.

      A01IOA4E10

    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
      H51-1 (+B) - H51-15 (E) W - W-B +B power supply Always 11 to 14 V
      H51-15 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω
      H51-16 (IG) - H51-15 (E) L - W-B IG power supply Engine switch off → on (IG) Below 1 V →11 to 14 V
      H51-17 (CUTB) - H51-15 (E) W - W-B +B power supply Always 11 to 14 V

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

    3. Reconnect the H51 ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H51-3 (CLG1) - H51-15 (E) W - W-B Door electrical key oscillator (for driver side) sensor signal Engine switch off, all doors closed, key not in cabin and transmitter lock switch not pressed → pressed No pulse generation → Pulse generation
      H51-4 (CG1B) - H51-15 (E) G - W-B Door electrical key oscillator (for driver side) sensor signal Engine switch off, all doors closed, key not in cabin and transmitter lock switch not pressed → pressed No pulse generation → Pulse generation
      H51-5 (CLG2) - H51-15 (E) W - W-B Door electrical key oscillator (for passenger side) sensor signal Engine switch off, all doors closed, key not in cabin and transmitter lock switch not pressed → pressed No pulse generation → Pulse generation
      H51-6 (CG2B) - H51-15 (E) R - W-B Door electrical key oscillator (for passenger side) sensor signal Engine switch off, all doors closed, key not in cabin and transmitter lock switch not pressed → pressed No pulse generation → Pulse generation
      H51-7 (CLG5) - H51-15 (E) R - W-B Indoor electrical key oscillator (front floor) sensor signal Engine switch off, all doors closed, key not in cabin and lock sensor off → on No pulse generation → Pulse generation
      H51-8 (CG5B) - H51-15 (E) G - W-B Indoor electrical key oscillator (front floor) sensor signal Engine switch off, all doors closed, key not in cabin and lock sensor off → on No pulse generation → Pulse generation
      H51-18 (TSW1) - H51-15 (E) Y - W-B Entry lock sensor (for driver side) signal Engine switch off, all doors closed and lock sensor off → on Pulse generation → Below 2 V
      H51-19 (TSW2) - H51-15 (E) BR - W-B Entry lock sensor (for passenger side) signal Engine switch off, all doors closed and lock sensor off → on Pulse generation → Below 2 V
      H51-20 (SEN1) - H51-15 (E) R - W-B Entry unlock sensor (for driver side) detection signal Engine switch off, all doors locked, key not close enough to vehicle and unlock sensor (driver side) off → on Pulse generation → Below 2 V
      H51-21 (SEN2) - H51-15 (E) L - W-B Entry unlock sensor (for passenger side) detection signal Engine switch off, all doors locked, key not close enough to vehicle and unlock sensor (passenger side) off → on Pulse generation → Below 2 V
      H51-26 (CLG7) - H51-15 (E) R - W-B Indoor electrical key oscillator (inside luggage) sensor signal Engine switch off, all doors closed, key not in cabin and lock sensor off → on No pulse generation → Pulse generation
      H51-27 (CG7B) - H51-15 (E) G - W-B Indoor electrical key oscillator (inside luggage) sensor signal Engine switch off, all doors closed, key not in cabin and lock sensor off → on No pulse generation → Pulse generation
      H51-24 (CLG6) - H51-15 (E) W - W-B Indoor electrical key oscillator (rear floor) sensor signal Engine switch off, all doors closed, key not in cabin and lock sensor off → on No pulse generation → Pulse generation
      H51-25 (CG6B) - H51-15 (E) R - W-B Indoor electrical key oscillator (rear floor) sensor signal Engine switch off, all doors closed, key not in cabin and lock sensor off → on No pulse generation → Pulse generation
      H51-32 (POS1) - H51-15 (E)

      V - W-B*1

      R - W-B*2

      		 Entry unlock sensor (for driver side) output signal Engine switch off → on (IG) 9 to 14 V → Below 2 V
      H51-33 (POS2) - H51-15 (E) BE - W-B Entry unlock sensor (for passenger side) output signal Engine switch off → on (IG) 9 to 14 V → Below 2 V
      H55-5 (RCO) - H51-15 (E) V - W-B Door control receiver power source Engine switch off, all doors closed and transmitter switch not pressed → pressed Below 1 V → 4.5 to 5.5 V
      H55-15 (RDA) - H51-15 (E) Y - W-B Door control receiver data input signal Engine switch off 11 to 14 V pulse generation at regular intervals
      H55-16 (RSSI) - H51-15 (E) L - W-B Door control receiver electric wave existence signal All doors locked, all doors closed and transmitter switch not pressed → pressed 11 to 14 V → Below 2 V
      H55-19 (CLG8) - H51-15 (E) SB - W-B Outside electrical key oscillator (outside luggage) sensor signal Engine switch off, all doors closed and back door open switch off → on No pulse generation → Pulse generation
      H55-20 (CG8B) - H51-15 (E) W - W-B Outside electrical key oscillator (outside luggage) sensor signal Engine switch off, all doors closed and back door open switch off → on No pulse generation → Pulse generation
      H51-22 (TSW5) - Body ground V - Body ground Back door open switch input Back door open switch off → on Pulse generation → Below 1 V
      H51-23 (TSW6) - Body ground BE - Body ground Back door lock switch input Back door lock switch off → on Pulse generation → Below 1 V

      • *1: for LHD

      • *2: for RHD

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

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

    A01IP5DE02

    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 Battery 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
      DA-21 (DCTY) - Body ground W - Body ground Front door courtesy light switch LH input 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
      DE-20 (PCTY) - Body ground BR - Body ground Front door courtesy light switch RH input 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
      H79-8 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch LH input 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
      DE-19 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch RH input 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
      DA-7 (BCTY) - Body ground LG - Body ground Back door courtesy light switch input Back door closed 11 to 14 V
      H79-25 (LSWD) - Body ground Y - Body ground Front door lock LH (door lock position switch) input Driver side door unlocked Below 1 V
      H79-25 (LSWD) - Body ground Y - Body ground Front door lock LH (door lock position switch) input Engine 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 RH (door lock position switch) input Front passenger side door unlocked Below 1 V
      H79-10 (LSWP) - Body ground LG - Body ground Front door lock RH (door lock position switch) input Engine switch off, all doors closed and front passenger side door locked Pulse generation (see waveform 3 or 4)
      H81-10 (LSR) - Body ground Y - Body ground Rear door lock (door lock position switch) input Rear door unlocked Below 1 V
      H81-10 (LSR) - Body ground Y - Body ground Rear door lock (door lock position switch) input Engine switch off, all doors closed and rear door locked Pulse generation (see waveform 5 or 6)
      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
      DC-6 (DCTY) - Body ground BR - Body ground Front door courtesy light switch RH input 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
      DA-24 (PCTY) - Body ground W - Body ground Front door courtesy light switch LH input 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
      H79-8 (LCTY) - Body ground SB - Body ground Rear door courtesy light switch LH input 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
      DE-19 (RCTY) - Body ground LG - Body ground Rear door courtesy light switch RH input 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
      DA-7 (BCTY) - Body ground LG - Body ground Back door courtesy light switch input Back door closed 11 to 14 V
      H79-25 (LSWD) - Body ground LG - Body ground Front door lock RH (door lock position switch) input Driver side door unlocked Below 1 V
      H79-25 (LSWD) - Body ground LG - Body ground Front door lock RH (door lock position switch) input Engine 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 LH (door lock position switch) input Front passenger side door unlocked Below 1 V
      H79-10 (LSWP) - Body ground LG - Body ground Front door lock LH (door lock position switch) input Engine switch off, all doors closed and front passenger side door locked Pulse generation (see waveform 3 or 4)
      H81-10 (LSR) - Body ground Y - Body ground Rear door lock (door lock position switch) input Rear door unlocked Below 1 V
      H81-10 (LSR) - Body ground Y - Body ground Rear door lock (door lock position switch) input Engine switch off, all doors closed and rear door locked Pulse generation (see waveform 5 or 6)

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

    5. A01IRIEE01

      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 Engine switch off, all doors closed and driver side door locked
    6. A01IQY4E01

      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 Engine switch off, all doors closed and driver side door locked
    7. A01IRIEE01

      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 Engine switch off, all doors closed and front passenger side door locked
    8. A01IQY4E01

      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 Engine switch off, all doors closed and front passenger side door locked
    9. A01IRIEE01

      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 Engine switch off, all doors closed and rear door locked
    10. A01IQY4E01

      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 Engine switch off, all doors closed and rear door locked