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Home >> Lexus >> 2019 >> UX 200 Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Smart Access System W/ Push-Button Start (Entry Function) (Diagnostics - Introduction) (Except Hybrid) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function, Gasoline Model) >> Terminals Of Ecu [10/2018 - 07/2022] >> Terminals Of Ecu [10/2018 - 07/2022]

Terminals Of Ecu [10/2018 - 07/2022]

  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    GTY831560Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F44 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 Input/Output Terminal Description Condition Specified Condition Related Data List Item
      F44-18 (E) - Body ground W-B - Body ground - Ground Always Below 1 Ω -
      F44-4 (+B) - F44-18 (E) SB - W-B Input Power supply Engine switch off 11 to 14 V -
      F44-15 (CUTB) - F44-18 (E) L - W-B Input Dark current cut pin* Engine switch off 11 to 14 V -
      1. *: In order to prevent the vehicle auxiliary 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 installed in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle auxiliary battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of radio waves every 0.25 seconds, which form the detection area, stops).
    3. Reconnect the F44 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 Input/Output Terminal Description Condition Specified Condition Related Data List Item
      F44-17 (IG1D) - F44-18 (E) GR - W-B Output IG power supply Engine switch off → on (IG) Below 1 V → 9 V or higher Power source control 
      1. IG Relay Monitor (Outside)
      F44-16 (ACCD) - F44-18 (E) R - W-B Output ACC power supply Engine switch off → on (ACC) Below 1 V → 8.5 V or higher Power source control 
      1. ACC Relay Monitor
      N61-17 (CLG1) - F44-18 (E) L - W-B Output Output to driver door electrical key antenna
      (request signal (challenge) is sent to door electrical key antenna from certification ECU (smart key ECU assembly) to form detection area)      		 Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought inside detection area*1)

      		 Pulse generation
      (See waveform 1)      		 -
      Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*1)

      		 Pulse generation
      (See waveform 2)      		 -
      N61-17 (CLG1) - F44-18 (E) L - W-B Input Input to driver door lock sensor
      (front door outside handle assembly LH lock sensor on signal is sent to the certification ECU (smart key ECU assembly))      		 Procedure:
      1. Engine switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors closed
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*1)

      5. Driver door lock sensor touched
      		 Pulse generation
      (See waveform 3)      		 Smart Access 
      1. D-Door Trigger Switch
      N61-17 (CLG1) - F44-18 (E) L - W-B Input Input to driver door unlock sensor
      (when system is in unlock standby mode and unlock sensor is touched, door electrical key antenna sends unlock sensor input signal (sensing) to certification ECU (smart key ECU assembly))      		 Procedure:
      1. Engine switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors locked
      4. Electrical key transmitter sub-assembly not near the vehicle
      5. Driver door unlock sensor touched
      		 Pulse generation
      (See waveform 4)      		 Smart Access 
      1. D-Door Touch Sensor
      N61-16 (CG1B) - F44-18 (E) LG - W-B Output Output to driver door electrical key antenna (terminal on opposite side of component from CLG1 output terminal) Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought inside detection area*1)

      		 Pulse generation
      (See waveform 5)      		 -
      Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*1)

      		 Pulse generation
      (See waveform 6)      		 -
      N61-15 (CLG2) - F44-18 (E) G - W-B Output Output to front passenger door electrical key antenna
      (request signal (challenge) is sent to door electrical key antenna from certification ECU (smart key ECU assembly) to form detection area)      		 Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought inside detection area*1)

      		 Pulse generation
      (See waveform 1)      		 -
      Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*1)

      		 Pulse generation
      (See waveform 2)      		 -
      N61-15 (CLG2) - F44-18 (E) G - W-B Input Input to front passenger door lock sensor
      (front door outside handle assembly RH lock sensor on signal is sent to the certification ECU (smart key ECU assembly))      		 Procedure:
      1. Engine switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors closed
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*1)

      5. Front passenger door lock sensor touched
      		 Pulse generation
      (See waveform 3)      		 Smart Access 
      1. P-Door Touch Sensor
      N61-15 (CLG2) - F44-18 (E) G - W-B Input Input to front passenger door unlock sensor
      (when system is in unlock standby mode and unlock sensor is touched, door electrical key antenna sends unlock sensor input signal (sensing) to certification ECU (smart key ECU assembly))      		 Procedure:
      1. Engine switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors locked
      4. Electrical key transmitter sub-assembly not near the vehicle
      5. Front passenger door unlock sensor touched
      		 Pulse generation
      (See waveform 4)      		 Smart Access 
      1. P-Door Touch Sensor
      N61-14 (CG2B) - F44-18 (E) GR - W-B Output Output to front passenger door electrical key antenna (terminal on opposite side of component from CLG2 output terminal) Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought inside detection area*1)

      		 Pulse generation
      (See waveform 5)      		 -
      Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*1)

      		 Pulse generation
      (See waveform 6)      		 -
      N61-13 (CLG8) - F44-18 (E) P - W-B Output Output to electrical key antenna (outside luggage compartment) Procedure:
      1. Engine switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors closed
      4. Back door opener switch off → on
      		 Pulse generation
      (See waveform 7)      		 -
      N61-12 (CG8B) - F44-18 (E) W - W-B Output Output to electrical key antenna (outside luggage compartment) (terminal on opposite side of component from CLG8 output terminal) Procedure:
      1. Engine switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors closed
      4. Back door opener switch off → on
      		 Pulse generation
      (See waveform 7)      		 -
      N61-26 (TSW5) - F44-18 (E) B - W-B Input Back door opener switch assembly(open switch) signal input Back door opener switch assembly (open switch) off → on Pulse generation
      (See waveform 8)      		 Tr/B-Door Unlock SW
      N61-27 (TSW6) - F44-18 (E) GR - W-B Input Back door opener switch assembly (lock switch) signal input Back door opener switch assembly (lock switch) off → on Pulse generation
      (See waveform 8)      		 Tr/B-Door Lock SW
      N61-18 (RCO) - F44-18 (E) G - W-B Output Output to electrical key and TPMS receiver assembly
      (Power supply for electrical key and TPMS receiver assembly. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)      		 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
      		 Pulse generation
      (See waveform 9)      		 -
      N61-19 (RDAM) - F44-18 (E) P - W-B Input Electrical key and TPMS receiver assembly verifies data received from electrical key transmitter sub-assembly.
      Electrical key and TPMS receiver assembly sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Electrical key and TPMS receiver assembly 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 10)      		 -
      N61-20 (CSEL) - F44-18 (E) V - W-B Output Communication channel switching circuit Procedure:
      1. Engine switch off
      2. All doors closed
      		 Below 1 V → Pulse generation -
      1. *1: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [10/2018 - 08/2021] Refer to OPERATION CHECK [08/2021 - 07/2022] 

    5. Using an oscilloscope, check waveform 1.
      NOTE:

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

      GTY448796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 1 (REFERENCE)

      Item Content
      Tester Connection N61-17 (CLG1) - F44-18 (E)
      N61-15 (CLG2) - F44-18 (E)
      Tool Setting 5 V/DIV., 500 ms./DIV.
      Condition Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought inside detection area*)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [10/2018 - 08/2021] Refer to OPERATION CHECK [08/2021 - 07/2022] 

    6. Using an oscilloscope, check waveform 2.
      NOTE:

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

      GTY427636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 2 (REFERENCE)

      Item Content
      Tester Connection N61-17 (CLG1) - F44-18 (E)
      N61-15 (CLG2) - F44-18 (E)
      Tool Setting 5 V/DIV., 100 ms./DIV.
      Condition Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [10/2018 - 08/2021] Refer to OPERATION CHECK [08/2021 - 07/2022] 

    7. Using an oscilloscope, check waveform 3.
      NOTE:

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

      GTY430392Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Lock sensor not touched
      *b Lock sensor touched
      WAVEFORM 3 (REFERENCE)

      Item Content
      Tester Connection N61-17 (CLG1) - F44-18 (E)
      N61-15 (CLG2) - F44-18 (E)
      Tool Setting 5 V/DIV., 40 ms./DIV.
      Condition Procedure:
      1. Engine switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors closed
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*)

      5. Lock sensor not touched → touched
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [10/2018 - 08/2021] Refer to OPERATION CHECK [08/2021 - 07/2022] 

    8. Using an oscilloscope, check waveform 4.
      NOTE:

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

      GTY438196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Unlock sensor not touched
      *b Unlock sensor touched
      WAVEFORM 4 (REFERENCE)

      Item Content
      Tester Connection N61-17 (CLG1) - F44-18 (E)
      N61-15 (CLG2) - F44-18 (E)
      Tool Setting 5 V/DIV., 50 ms./DIV.
      Condition Procedure:
      1. Engine switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors locked
      4. Electrical key transmitter sub-assembly not near the vehicle
      5. Unlock sensor not touched → touched
    9. Using an oscilloscope, check waveform 5.
      NOTE:

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

      GTY504760Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 5 (REFERENCE)

      Item Content
      Tester Connection N61-16 (CG1B) - F44-18 (E)
      N61-14 (CG2B) - F44-18 (E)
      Tool Setting 5 V/DIV., 500 ms./DIV.
      Condition Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought inside detection area*)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [10/2018 - 08/2021] Refer to OPERATION CHECK [08/2021 - 07/2022] 

    10. Using an oscilloscope, check waveform 6.
      NOTE:

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

      GTY499393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 6 (REFERENCE)

      Item Content
      Tester Connection N61-16 (CG1B) - F44-18 (E)
      N61-14 (CG2B) - F44-18 (E)
      Tool Setting 5 V/DIV., 100 ms./DIV.
      Condition Procedure:
      1. Engine switch off
      2. All doors closed
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. All doors locked through wireless operation

        (electrical key transmitter sub-assembly brought outside detection area*)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [10/2018 - 08/2021] Refer to OPERATION CHECK [08/2021 - 07/2022] 

    11. Using an oscilloscope, check waveform 7.
      NOTE:

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

      GTY432845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 7 (REFERENCE)

      Item Content
      Tester Connection N61-13 (CLG8) - F44-18 (E)
      N61-12 (CG8B) - F44-18 (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. All doors closed
      4. Luggage electrical key switch off → on
    12. Using an oscilloscope, check waveform 8.
      NOTE:

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

      GTY790275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Checking for switch on signal at short intervals
      WAVEFORM 8 (REFERENCE)

      Item Content
      Tester Connection N61-26 (TSW5) - F44-18 (E)
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition Back door opener switch assembly (open switch) off → on
    13. Using an oscilloscope, check waveform 9.
      NOTE:

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

      GTY376258Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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
      WAVEFORM 9 (REFERENCE)

      Item Content
      Tester Connection N61-18 (RCO) - F44-18 (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
    14. Using an oscilloscope, check waveform 10.
      NOTE:

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

      GTY367752Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *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
      WAVEFORM 10 (REFERENCE)

      Item Content
      Tester Connection N61-19 (RDAM) - F44-18 (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
  2. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    GTY810406Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *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.

      Refer to REMOVAL [10/2018 - 07/2022]

    2. Measure the voltage and resistance according to the value(s) in the table below.
      Tester Connection Wiring Color Input/Output Terminal Description Condition Specified Condition
      MB-11 (GND1) - Body ground - - Ground Always Below 1 Ω
      MB-31 (BECU) - Body ground - Input Auxiliary battery power supply (for CPU) Engine switch off 11 to 14 V
    3. Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

      Refer to INSTALLATION [10/2018 - ]

    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Tester Connection Wiring Color Input/Output Terminal Description Condition Specified Condition
      4C-29 (BZR) - Body ground B - Body ground Output Wireless buzzer signal output Procedure:
      1. Engine switch off
      2. All doors closed
      3. Lock switch of electrical key transmitter sub-assembly not pressed → pressed
      		 Below 1 V → pulse generation
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