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


  1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND BODY ECU

    B003NLDC19
    *A for RHD *B for LHD
    *1 Instrument Panel Junction Block Assembly - -
    B003Q15C11
    *1 Body ECU - -

    1. Remove the body ECU from the instrument panel junction block assembly.

      for LHD: Click here

      for RHD: Click here

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

      Tech Tips

      Measure the values on the wire harness side with the connectors disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-1 (GND) - Body ground - Ground Always Below 1 Ω
      A-6 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      A-7 (IG) - Body ground - Ignition power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

    3. Install the body ECU to the instrument panel junction block assembly.

      for LHD: Click here

      for RHD: Click here

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      2N-2 (ACT+) - Body ground

      LG - Body ground*1

      LA-B - Body ground*2

      		 Door lock motor lock drive output (all doors) Door control switch (power window regulator master switch assembly) or driver door key cylinder off Below 1 V
      Door control switch (power window regulator master switch assembly) or driver door key cylinder locked 11 to 14 V
      2N-3 (ACT-) - Body ground

      GR - Body ground*1

      LA-W - Body ground*2

      		 Door lock motor unlock drive output (all doors) Door control switch (power window regulator master switch assembly) or driver door key cylinder off Below 1 V
      Door control switch (power window regulator master switch assembly) or driver door key cylinder unlocked 11 to 14 V
      2Q-1 (DCTY) - Body ground B - Body ground Driver door courtesy light switch input Driver door open Below 1 V
      Driver door closed Pulse generation
      2Q-2 (ACTY) - Body ground Y - Body ground All door courtesy light switches input except driver door Except driver door open Below 1 V
      Except driver door closed Pulse generation
      2L-4 (DCTY) - Body ground R - Body ground Driver door courtesy light switch input Driver door open Below 1 V
      Driver door closed Pulse generation
      G33-2 (LSWP) - Body ground Y - Body ground Except driver door unlock detection switch input Except driver door unlocked Below 1 V
      Except driver door locked Pulse generation
      G33-6 (HAZ) - Body ground SB - Body ground Hazard warning signal output Answer-back off 11 to 14 V
      Answer-back on Below 1 V
      G33-9 (PRG) - Body ground V - Body ground Signal output to certification ECU (smart key ECU assembly)

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. 10 seconds elapsed after all doors locked

      4. Electrical key transmitter sub-assembly unlock switch not pressed

      		 11 to 14 V

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. 10 seconds elapsed after all doors locked

      4. Electrical key transmitter sub-assembly unlock switch pressed

      		 Pulse generation
      G33-14 (PCTY) - Body ground LG - Body ground Front passenger door courtesy light switch input Front passenger door open Below 1 V
      Front passenger door closed Pulse generation
      G33-15 (LSWD) - Body ground R - Body ground Driver door unlock detection switch input Driver door unlocked Below 1 V
      Driver door locked Pulse generation
      G33-16 (RDA) - Body ground W - Body ground Signal input from certification ECU (smart key ECU assembly)

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. 10 seconds elapsed after all doors locked

      4. Electrical key transmitter sub-assembly unlock switch not pressed

      		 11 to 14 V

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. 10 seconds elapsed after all doors locked

      4. Electrical key transmitter sub-assembly unlock switch pressed

      		 Pulse generation

      • *1: w/ Door Control Battery

      • *2: w/o Door Control Battery

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    B003JL4N03

    1. Disconnect the G16 and G17 certification ECU (smart key ECU assembly) connectors.

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

      Tech Tips

      Measure the values on the wire harness side with the connectors disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G16-1 (+B) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      G16-10 (E) - Body ground BR - Body ground Ground Always Below 1 Ω
      G17-33 (CUTB) - Body ground W - Body ground Dark current cut fuse pin input signal* Always 11 to 14 V

      • *: In order to prevent the vehicle battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is set in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode.

    3. Reconnect the G16 and G17 certification ECU (smart key ECU assembly) connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G16-2 (BZR) - Body ground SB - Body ground Wireless door lock buzzer signal Wireless door lock buzzer off Below 1 V
      Wireless door lock buzzer on Pulse generation
      G17-3 (RCO) - G16-10 (E) G - BR Wireless tuner power supply output circuit

        Procedure:

      1. Engine switch off

      2. Electrical key transmitter sub-assembly brought outside vehicle

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

      		 Pulse generation (See waveform 1)
      G16-9 (LSWP) - G16-10 (E) L - BR Except driver door unlock detection switch input

        Procedure:

      1. Engine switch off

      2. All doors closed

      3. All doors unlocked

      4. Lock button of electrical key transmitter sub-assembly not pressed

      		 Below 1 V

        Procedure:

      1. Engine switch off

      2. All doors closed

      3. All doors unlocked

      4. Lock button of electrical key transmitter sub-assembly pressed

      		 8.5 V or higher
      G16-13 (RDA3) - G16-10 (E) W - BR Signal output to body ECU

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. 10 seconds elapsed after all doors locked

      4. Electrical key transmitter sub-assembly unlock switch not pressed

      		 11 to 14 V

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. 10 seconds elapsed after all doors locked

      4. Electrical key transmitter sub-assembly unlock switch pressed

      		 Pulse generation
      G17-21 (CSEL) - G16-10 (E) P - BR Communication channel switching circuit

        Procedure:

      1. Engine switch off

      2. All doors closed

      		 Pulse generation (See waveform 2)
      G17-22 (RDAS) - G16-10 (E) L - BR Door control receiver verifies data received from electrical key transmitter sub-assembly. Door control receiver sends data to ECU and intermittently grounds 12 V signal from certification ECU (smart key ECU assembly).

        Procedure:

      1. Engine switch off

      2. All doors locked

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

      		 Pulse generation (See waveform 3)
      G17-36 (PRG3) - G16-10 (E) V - BR Signal input from body ECU

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. 10 seconds elapsed after all doors locked

      4. Electrical key transmitter sub-assembly unlock switch not pressed

      		 11 to 14 V

        Procedure:

      1. Engine switch off

      2. All doors locked

      3. 10 seconds elapsed after all doors locked

      4. Electrical key transmitter sub-assembly unlock switch pressed

      		 Pulse generation
    5. B003OQKC19
      *a Before lock or unlock button of electrical key transmitter sub-assembly pressed
      *b After lock or unlock button 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 G17-3 (RCO) - G16-10 (E)
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition

      Procedure:


      1. Engine switch off

      2. Electrical key transmitter sub-assembly brought outside vehicle

      3. Lock or unlock button of electrical key transmitter sub-assembly not pressed → pressed
    6. B003OK2E01

      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 G17-21 (CSEL) - G16-10 (E)
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition

        Procedure:

      1. Engine switch off

      2. All doors closed
    7. B003LK4C18
      *a Before lock or unlock button of electrical key transmitter sub-assembly pressed
      *b After lock or unlock button of electrical key transmitter sub-assembly pressed

      Using an oscilloscope, check waveform 3.

      Tech Tips

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

      Waveform 3 (Reference)
      Item Content
      Tester Connection G17-22 (RDAS) - G16-10 (E)
      Tool Setting 5 V/DIV., 500 ms./DIV.
      Condition

        Procedure:

      1. Engine switch off

      2. All doors locked

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

  3. CHECK COMBINATION METER ASSEMBLY

    Click here