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Terminals Of Ecu [12/2023 - ]

WARNING: This page is about a different car, the 2024 Toyota Mirai. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    GTY1005437Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D86 certification ECU (smart key ECU assembly) connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Tester Connection Input/Output Terminal Description Condition Specified Condition Related Data List Item
      D86-18 (E) - Body ground - Ground Always Below 1 Ω -
      D86-4 (+B) - D86-18 (E) Input Power supply Ignition switch off 11 to 14 V -
      D86-15 (CUTB) - D86-18 (E) Input Dark current cut pin* Ignition 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 D86 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 Input/Output Terminal Description Condition Specified Condition Related Data List Item
      D86-17 (IG1D) - D86-18 (E) Output IG power supply Ignition switch off → on (IG) Below 1 V → 10 V or higher Power source control 
      1. IG Relay Monitor (Outside)
      D86-16 (ACCD) - D86-18 (E) Output ACC power supply Ignition switch off → on (ACC) Below 1 V → 10 V or higher Power source control 
      1. ACC Relay Monitor
      G37-17 (CLG1) - D86-18 (E) 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. Ignition 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*)

      		 Pulse generation
      (See waveform 1)      		 -
      Procedure:
      1. Ignition 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*)

      		 Pulse generation
      (See waveform 2)
      G37-17 (CLG1) - D86-18 (E) Input Input to driver door lock sensor
      (front door outside handle assembly (for Driver Door) lock sensor on signal is sent to the certification ECU (smart key ECU assembly))      		 Procedure:
      1. Ignition 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. Driver door lock sensor touched
      		 Pulse generation
      (See waveform 3)      		 Smart Key 
      1. D-Door Trigger Switch
      G37-17 (CLG1) - D86-18 (E) 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. Ignition 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 Key 
      1. D-Door Touch Sensor
      G37-16 (CG1B) - D86-18 (E) Output Output to driver door electrical key antenna (terminal on opposite side of component from CLG1 output terminal) Procedure:
      1. Ignition 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*)

      		 Pulse generation
      (See waveform 5)      		 -
      Procedure:
      1. Ignition 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*)

      		 Pulse generation
      (See waveform 6)
      G37-15 (CLG2) - D86-18 (E) 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. Ignition 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*)

      		 Pulse generation
      (See waveform 1)      		 -
      Procedure:
      1. Ignition 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*)

      		 Pulse generation
      (See waveform 2)
      G37-15 (CLG2) - D86-18 (E) Input Input to front passenger door lock sensor
      (front door outside handle assembly (for front passenger door) lock sensor on signal is sent to the certification ECU (smart key ECU assembly))      		 Procedure:
      1. Ignition 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. Front passenger door lock sensor touched
      		 Pulse generation
      (See waveform 3)      		 Smart Key 
      1. P-Door Touch Sensor
      G37-15 (CLG2) - D86-18 (E) 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. Ignition 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 Key 
      1. P-Door Touch Sensor
      G37-14 (CG2B) - D86-18 (E) Output Output to front passenger door electrical key antenna (terminal on opposite side of component from CLG2 output terminal) Procedure:
      1. Ignition 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*)

      		 Pulse generation
      (See waveform 5)      		 -
      Procedure:
      1. Ignition 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*)

      		 Pulse generation
      (See waveform 6)
      G37-11 (CLG7) - D86-18 (E) Output Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment) Procedure:
      1. Door is closed
      2. Ignition switch off
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. Driver door lock sensor touched
      		 Pulse generation
      (See waveform 7)      		 -
      G37-10 (CG7B) - D86-18 (E) Output Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment) (terminal on opposite side of component from CLG7 output terminal) Procedure:
      1. Door is closed
      2. Ignition switch off
      3. Electrical key transmitter sub-assembly not inside vehicle
      4. Driver door lock sensor touched
      		 Pulse generation
      (See waveform 7)      		 -
      G37-13 (CLG8) - D86-18 (E) Output Output to electrical key antenna (outside luggage compartment) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors closed
      4. Luggage electrical key switch off → on
      		 Pulse generation
      (See waveform 8)      		 -
      G37-12 (CG8B) - D86-18 (E) Output Output to electrical key antenna (outside luggage compartment) (terminal on opposite side of component from CLG8 output terminal) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly brought outside vehicle
      3. All doors closed
      4. Luggage electrical key switch off → on
      		 Pulse generation
      (See waveform 8)      		 -
      G37-26 (TSW5) - D86-18 (E) Input Luggage electrical key switch signal input Luggage electrical key switch off → on Pulse generation
      (See waveform 9)      		 Smart Key 
      1. Tr/B-Door Unlock SW
      G37-18 (RCO) - D86-18 (E) Output Output to door control receiver
      (Power supply for door control receiver. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)      		 Procedure:
      1. Ignition 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 10)      		 -
      G37-19 (RDAM) - D86-18 (E) Input 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. Ignition 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 11)      		 -
      G37-20 (CSEL) - D86-18 (E) Output Communication channel switching circuit Procedure:
      1. Ignition switch off
      2. All doors closed
      		 Below 1 V → Pulse generation -
      G37-21 (ASEL) - D86-18 (E) Output Communication channel switching circuit Procedure:
      1. Ignition switch off
      2. All doors locked
      3. Electrical key transmitter sub-assembly held and then luggage electrical key switch off → on
      		 Below 1 V → 4.5 to 6 V -
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [12/2023 - ] 

    5. Using an oscilloscope, check waveform of the ECU.
      NOTE:

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

      1. Waveform 1
        Item Content
        Tester Connection G37-17 (CLG1) - D86-18 (E)
        G37-15 (CLG2) - D86-18 (E)
        Tool Setting 5 V/DIV., 500 ms/DIV.
        Condition Procedure:
        1. Ignition 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*)
        Fig 1: Waveform 1
        GTY448796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        1. *: For details about the entry function detection area, refer to Operation Check.

          Refer to OPERATION CHECK [12/2023 - ] 

      2. Waveform 2
        Item Content
        Tester Connection G37-17 (CLG1) - D86-18 (E)
        G37-15 (CLG2) - D86-18 (E)
        Tool Setting 5 V/DIV., 100 ms/DIV.
        Condition Procedure:
        1. Ignition 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*)
        Fig 2: Waveform 2
        GTY427636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        1. *: For details about the entry function detection area, refer to Operation Check.

          Refer to OPERATION CHECK [12/2023 - ] 

      3. Waveform 3
        Item Content
        Tester Connection G37-17 (CLG1) - D86-18 (E)
        G37-15 (CLG2) - D86-18 (E)
        Tool Setting 5 V/DIV., 40 ms/DIV.
        Condition Procedure:
        1. Ignition 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
        Fig 3: Waveform 3
        GTY430392Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Lock sensor not touched
        *b Lock sensor touched
        1. *: For details about the entry function detection area, refer to Operation Check.

          Refer to OPERATION CHECK [12/2023 - ] 

      4. Waveform 4
        Item Content
        Tester Connection G37-17 (CLG1) - D86-18 (E)
        G37-15 (CLG2) - D86-18 (E)
        Tool Setting 5 V/DIV., 50 ms/DIV.
        Condition Procedure:
        1. Ignition 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
        Fig 4: Waveform 4
        GTY438196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Unlock sensor not touched
        *b Unlock sensor touched
      5. Waveform 5
        Item Content
        Tester Connection G37-16 (CG1B) - D86-18 (E)
        G37-14 (CG2B) - D86-18 (E)
        Tool Setting 5 V/DIV., 500 ms/DIV.
        Condition Procedure:
        1. Ignition 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*)
        Fig 5: Waveform 5
        GTY504760Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        1. *: For details about the entry function detection area, refer to Operation Check.

          Refer to OPERATION CHECK [12/2023 - ] 

      6. Waveform 6
        Item Content
        Tester Connection G37-16 (CG1B) - D86-18 (E)
        G37-14 (CG2B) - D86-18 (E)
        Tool Setting 5 V/DIV., 100 ms/DIV.
        Condition Procedure:
        1. Ignition 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*)
        Fig 6: Waveform 6
        GTY499393Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        1. *: For details about the entry function detection area, refer to Operation Check.

          Refer to OPERATION CHECK [12/2023 - ] 

      7. Waveform 7
        Item Content
        Tester Connection G37-11 (CLG7) - D86-18 (E)
        G37-10 (CG7B) - D86-18 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition Procedure:
        1. Door is closed
        2. Ignition switch off
        3. Electrical key transmitter sub-assembly not inside vehicle
        4. Driver door lock sensor touched
        Fig 7: Waveform 7
        GTY746166Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Driver door lock sensor not touched
        *b Driver door lock sensor touched
      8. Waveform 8
        Item Content
        Tester Connection G37-13 (CLG8) - D86-18 (E)
        G37-12 (CG8B) - D86-18 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition Procedure:
        1. Ignition switch off
        2. Electrical key transmitter sub-assembly brought outside vehicle
        3. All doors closed
        4. Luggage electrical key switch off → on
        Fig 8: Waveform 8
        GTY432845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      9. Waveform 9
        Item Content
        Tester Connection G37-26 (TSW5) - D86-18 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition Luggage electrical key switch off → on
        Fig 9: Waveform 9
        GTY379040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Checking for switch on signal at short intervals
      10. Waveform 10
        Item Content
        Tester Connection G37-18 (RCO) - D86-18 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition Procedure:
        1. Ignition 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
        Fig 10: Waveform 10
        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
      11. Waveform 11
        Item Content
        Tester Connection G37-19 (RDAM) - D86-18 (E)
        Tool Setting 5 V/DIV., 500 ms/DIV.
        Condition Procedure:
        1. Ignition 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
        Fig 11: Waveform 11
        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
  2. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    Fig 12: Lin Communication System Terminals Of ECU
    GTY991699Courtesy 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 driver side junction block assembly.

      Refer to REMOVAL [12/2023 - ]

    2. Measure the voltage and resistance according to the value(s) in the table below.
      Tester Connection Input/Output Terminal Description Condition Specified Condition
      A-11 (GND1) - Body ground - Ground Always Below 1 Ω
      A-31 (BECU) - Body ground Input Auxiliary battery power supply (for CPU) Ignition switch off 11 to 14 V
    3. Install the main body ECU (multiplex network body ECU) to the driver side junction block assembly.
    4. Measure the voltage and check for pulses according to the value(s) in the table below.
      Tester Connection Input/Output Terminal Description Condition Specified Condition Related Data List Item
      4F-31 (BZR) - Body ground Output Wireless door lock buzzer output Active Test Wireless Buzzer on Pulse generation
      (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)      		 -
      Active Test Wireless Buzzer off Below 1 V
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