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Terminals Of Ecu [12/2019 - 11/2023]

  1. CHECK MULTIPLEX NETWORK DOOR ECU 
    GTY857180Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the W18 and W19 multiplex network door ECU connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      W18-20 (ECUB) - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      W18-18 (IG) - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      W19-1 (B) - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      W19-10 (GND) - Body ground Body ground Always Below 1 Ω
      1. *1: for HV Model
      2. *2: for Gasoline Model
    3. Reconnect the W18 and W19 multiplex network door ECU connectors.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      W18-1 (DS1) - Body ground Power back door unit assembly set LH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating Pulse generation
      (See waveform 1)
      W18-2 (DS2) - Body ground Power back door unit assembly set LH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating Pulse generation
      (See waveform 2)
      W18-3 (DS12) - Body ground Power back door unit assembly set RH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating Pulse generation
      (See waveform 1)
      W18-4 (DS22) - Body ground Power back door unit assembly set RH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating Pulse generation
      (See waveform 2)
      W18-5 (DSV2) - Body ground Power back door unit assembly set RH (door sensor) power supply Always 7 V or higher
      W18-6 (OSR) - W18-24 (OSE) Power back door sensor assembly RH signal Power back door sensor assembly RH not pressed 4 to 6 V
      Power back door sensor assembly RH pressed Below 1 V
      W18-8 (BDDN) - Body ground No. 1 power back door control switch No. 1 power back door control switch on Below 1 V
      No. 1 power back door control switch off Pulse generation
      W18-12 (LIB) - Body ground Back door lock signal Back door is locked Below 1 V
      Back door is unlocked 11 to 14 V
      W18-14 (KSIN) - Body ground* Kick detection signal Kick door control sensor not detecting a foot → detecting a foot Pulse generation
      (See waveform 3)
      W18-16 (BZR+) - Body ground Wireless door lock buzzer signal Active Test PBD Buzzer is ON Pulse generation
      (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)
      Active Test PBD Buzzer is OFF Below 1 V
      W18-19 (DSG2) - Body ground Power back door unit assembly set RH (door sensor) ground Always Below 1 V
      W18-21 (DSG) - Body ground Power back door unit assembly set LH (door sensor) ground Always Below 1 V
      W18-25 (DSV) - Body ground Power back door unit assembly set LH (door sensor) power supply Always 7 V or higher
      W18-26 (OSL) - W18-24 (OSE) Power back door sensor assembly LH signal Power back door sensor assembly LH not pressed 4 to 6 V
      Power back door sensor assembly LH pressed Below 1 V
      W19-4 (DC+) - W19-3 (DC-) Back door lock with courtesy light switch assembly (back door lock motor) circuit Back door lock motor operating 11 to 14 V
      Back door lock motor not operating Below 1 V
      1. *: w/ Hands Free Power Back Door
      1. Using an oscilloscope, check waveform 1.
        GTY633804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 1 (REFERENCE)

        Item Condition
        Tester Connection
        • W18-1 (DS1) - Body ground
        • W18-3 (DS12) - Body ground
        Tool setting 2 V/DIV., 2 ms/DIV.
        Vehicle condition Power back door operating

        HINT: 

        The period changes in accordance with the speed at which the power back door is opened and closed.

      2. Using an oscilloscope, check waveform 2.
        WAVEFORM 2 (REFERENCE)

        Item Condition
        Tester Connection
        • W18-2 (DS2) - Body ground
        • W18-4 (DS22) - Body ground
        Tool setting 2 V/DIV., 2 ms/DIV.
        Vehicle condition Power back door operating

        HINT: 

        The period changes in accordance with the speed at which the power back door is opened and closed.

        GTY656366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Using an oscilloscope, check waveform 3.
        WAVEFORM 3 (REFERENCE)

        Item Condition
        Tester Connection W18-14 (KSIN) - Body ground*
        Tool setting 2 V/DIV., 50 ms/DIV.
        Vehicle condition Kick door control sensor not detecting a foot → detecting a foot
        GTY928805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Kick detection signal
        1. *: w/ Hands Free Power Back Door
  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    GTY862616Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *A for Gasoline Model - -
    1. Disconnect the H48 certification ECU (smart key ECU assembly) connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H48-4 (+B) - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      H48-18 (E) - Body ground Body ground Always Below 1 Ω
      1. *1: for HV Model
      2. *2: for Gasoline Model
    3. Reconnect the H48 certification ECU (smart key ECU assembly) connector.
    4. Measure the waveform according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      M5-26 (TSW5) - H48-18 (E) Back door opener switch assembly (open switch) signal Back door opener switch assembly (open switch) off → on Pulse generation (See waveform 1)
      1. Using an oscilloscope, check the waveform.
        GTY515886Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Checking for switch on signal at short intervals
        WAVEFORM 1 (REFERENCE)

        Item Content
        Terminal No. (Symbol) M5-26 (TSW5) - H48-18 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition Back door opener switch assembly (open switch) off → on
  3. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 
    GTY851097Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

    2. Reconnect the instrument panel junction block assembly connectors.
    3. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      MB-31 (BECU) - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      MB-32 (IG) - Body ground Ignition power supply (IG signal) Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      MB-30 (ACC) - Body ground Ignition power supply (ACC signal) Ignition switch off Below 1 V
      Ignition switch ACC 11 to 14 V
      MB-11 (GND1) - Body ground Ground Always Below 1 Ω
      H42-19 (GND2) - Body ground Ground Always Below 1 Ω
      MB-4 (BCTY) - Body ground Back door courtesy light switch input Back door closed 10 kΩ or higher
      Back door open Below 1 Ω
      1. *1: for HV Model
      2. *2: for Gasoline Model
    4. Install the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.

      Refer to INSTALLATION [12/2019 - 10/2022] , or refer to INSTALLATION [10/2022 - 11/2023]

    5. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H44-4 (PBDS) - Body ground Power back door control switch signal Power back door control switch off Pulse generation
      Power back door control switch on Below 1 V
      G43-13 (LSBO) - Body ground Back door lock signal Back door is locked Below 1 V
      Back door is unlocked 11 to 14 V
      4C-29 (BZR) - Body ground Wireless door lock buzzer signal Wireless door lock buzzer not operating Below 1 V
      Wireless door lock buzzer operating Pulse generation
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