WIRELESS DOOR LOCK CONTROL SYSTEM TERMINALS OF ECU


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

    B005AH5C01
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.


    2. Reconnect the instrument panel junction block assembly connector.

    3. Measure the voltage and resistance according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω
      A-30 (ACC) - Body ground - ACC power supply Engine switch on (ACC) 11 to 14 V
      Engine switch off Below 1 V
      A-31 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-32 (IG) - Body ground - IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    4. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.


    5. Measure the voltage and check for pulses according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I47-2 (LSWR) - Body ground Y - Body ground Rear door RH unlock detection switch input Rear door RH unlocked Below 1 V
      Rear door RH locked Pulse generation
      I48-2 (UL3) - Body ground LG - Body ground Driver door key-linked unlock input Driver door key cylinder turned to neutral position → on (unlock) Pulse generation → Below 1 V
      I48-6 (FLCY) - Body ground G - Body ground Front door courtesy light switch LH input Front door LH open Below 1 V
      Front door LH closed Pulse generation
      I48-27 (FRCY) - Body ground W - Body ground Front door courtesy light switch RH input Front door RH open Below 1 V
      Front door RH closed Pulse generation
      I48-29 (L2) - Body ground

      R - Body ground*4

      B - Body ground*5

      		 Driver door key-linked lock input Driver door key cylinder turned to neutral position → on (lock) Pulse generation → Below 1 V
      4A-1 (ACT-) - Body ground R - Body ground Door lock motor unlock drive output Door control switch or driver door key cylinder off → on (unlock) Below 1 V → 11 to 14 V → Below 1 V
      4A-4 (ACT+) - Body ground R - Body ground Door lock motor lock drive output Door control switch or driver door key cylinder off → on (lock) Below 1 V → 11 to 14 V → Below 1 V
      4A-18 (LCTY) - Body ground W - Body ground Rear door courtesy light switch LH input Rear door LH open Below 1 V
      Rear door LH closed Pulse generation
      4A-21 (BCTY) - Body ground

      LG - Body ground*1

      R - Body ground*2

      		 Back door courtesy light switch input Back door open Below 1 V
      Back door closed Pulse generation
      4A-25 (TR+) - Body ground*3 W - Body ground Back door lock motor drive output Back door closed → open Below 1 V → 11 to 14 V → Below 1 V
      4A-34 (LSWL) - Body ground Y - Body ground Rear door LH unlock detection switch input Rear door LH unlocked Below 1 V
      Rear door LH locked Pulse generation
      4B-52 (BZR) - Body ground*6 P - Body ground Wireless door lock buzzer output Engine switch off, all doors closed, electrical key transmitter sub-assembly no inside vehicle and lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed (wireless door lock buzzer answer-back) Below 1 V → Pulse generation
      4D-4 (ACT-) - Body ground LG - Body ground Door lock motor unlock drive output Door control switch or driver door key cylinder off → on (unlock) Below 1 V → 11 to 14 V → Below 1 V
      4C-10 - Body ground R - Body ground Door lock power supply Door control switch or driver door key cylinder off → on (lock or unlock) 11 to 14 V → Below 1 V → 11 to 14 V
      4D-5 (ACT-) - Body ground B - Body ground Door lock motor unlock drive output Door control switch or driver door key cylinder off → on (unlock) Below 1 V → 11 to 14 V → Below 1 V
      4D-10 (ACTD) - Body ground B - Body ground Door lock motor unlock drive output Door control switch or driver door key cylinder off → on (unlock) Below 1 V → 11 to 14 V → Below 1 V
      4D-11 (ACT+) - Body ground R - Body ground Door lock motor lock drive output Door control switch or driver door key cylinder off → on (lock) Below 1 V → 11 to 14 V → Below 1 V
      4D-12 (ACT+) - Body ground R - Body ground Door lock motor lock drive output Door control switch or driver door key cylinder off → on (lock) Below 1 V → 11 to 14 V → Below 1 V
      4D-13 (ACT+) - Body ground P - Body ground Door lock motor lock drive output Door control switch or driver door key cylinder off → on (lock) Below 1 V → 11 to 14 V → Below 1 V
      4D-37 (RCTY) - Body ground Y - Body ground Rear door courtesy light switch RH input Rear door RH open Below 1 V
      Rear door RH closed Pulse generation
      4D-39 (LSFR) - Body ground P - Body ground Front door RH unlock detection switch input Front door RH unlocked Below 1 V
      Front door RH locked Pulse generation
      4D-40 (LSFL) - Body ground B - Body ground Front door LH unlock detection switch input Front door LH unlocked Below 1 V
      Front door LH locked Pulse generation

      • *1: w/ Rear Power Seat System

      • *2: w/o Rear Power Seat System

      • *3: w/o Power Back Door System

      • *4: for LHD

      • *5: for RHD

      • *6: w/ Wireless Door Lock Buzzer Answer-back Function

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B0058T7N38

    1. Disconnect the I53 certification ECU (smart key ECU assembly) connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I53-10 (+B) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      I53-11 (E) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the I53 certification ECU (smart key ECU assembly) connector.

    4. Measure the voltage and check for pulses according to the value(s) in the table below.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I52-18 (RCO) - I53-11 (E) R - W-B

      Output to door control receiver

      (Power supply for door control receiver. Certification ECU [smart key ECU assembly] outputs 5 V when receiver starts operating.)

        Proceed:

      1. Engine switch off

      2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      Pulse generation

      (See waveform 1)
      I52-19 (CSEL) - I53-11 (E) B - W-B Communication channel switching circuit

        Proceed:

      1. Engine switch off

      2. All doors closed

      		 Below 1 V → Pulse generation
      I52-20 (RDAM) - I53-11 (E) L - W-B

      Door control receiver verifies data received from electrical key transmitter sub-assembly.

      Door control receiver sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Door control receiver intermittently grounds 12 V signal from certification ECU [smart key ECU assembly]).

        Proceed:

      1. Engine switch off

      2. All doors locked

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

      Pulse generation

      (See waveform 2)
    5. B00585HC12
      *a Before lock or unlock switch of electrical key transmitter sub-assembly pressed
      *b After lock or unlock switch of electrical key transmitter sub-assembly pressed

      Using an oscilloscope, check waveform 1.

      Tech Tips

      The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      Waveform 1 (Reference)
      Item Content
      Tester Connection I52-18 (RCO) - I53-11 (E)
      Tool Setting 2 V/DIV., 500 ms/DIV.
      Condition

        Procedure:

      1. Engine switch off

      2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed
    6. B00576IC12
      *a Before lock or unlock switch of electrical key transmitter sub-assembly pressed
      *b After lock or unlock switch of electrical key transmitter sub-assembly pressed

      Using an oscilloscope, check waveform 2.

      Tech Tips

      The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

      Waveform 2 (Reference)
      Item Content
      Tester Connection I52-20 (RDAM) - I53-11 (E)
      Tool Setting 5 V/DIV., 500 ms/DIV.
      Condition

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. Electrical key transmitter sub-assembly not inside vehicle

      4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area

      5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed