DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Smart Key System (For Entry) - Diagnostics - Introduction >> SMART KEY SYSTEM (for Entry Function) >> Terminals Of Ecu [11/2023 - ] >> Terminals Of Ecu [11/2023 - ]

Terminals Of Ecu [11/2023 - ]

  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    GTY1178468Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A88 and H138 certification ECU (smart key ECU assembly) connectors.
    2. Measure the voltage and resistance according to the value (s) in the table below.
      Tester Connection Terminal Description Condition Specified Condition Related Data List Item
      H138-29 (E) - Body ground Ground Always Below 1 Ω -
      H138-6 (+B) - H138-29 (E) Power supply Ignition switch off 11 to 14 V -
      A88-22 (CUTB) - H138-29 (E) 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. Connect the A88 and H138 certification ECU (smart key ECU assembly) connectors.
    4. Measure the voltage and check for pulses according to the value (s) in the table below.
      Tester Connection Terminal Description Condition Specified Condition Related Data List Item
      A88-24 (IGPD) - H138-29 (E) IG power supply Ignition switch off → ON Below 1 V → 9 V or higher Power source control 
      1. IGP Relay Circuit (Outside) Monitor
      A88-11 (IGRD) - H138-29 (E) IG power supply Ignition switch off → ON Below 1 V → 9 V or higher Power source control 
      1. IGR Relay Circuit (Outside) Monitor
      H138-21 (ACCD) - H138-29 (E) ACC power supply Ignition switch off → ACC Below 1 V → 8.5 V or higher Power source control 
      1. ACC Relay Monitor
      H138-16 (CLG1) - H138-29 (E) 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)      		 -
      H138-16 (CLG1) - H138-29 (E) 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. Driver Side Lock Sensor
      H138-16 (CLG1) - H138-29 (E) 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. Driver Side Unlock Sensor
      H138-15 (CG1B) - H138-29 (E) 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)      		 -
      H138-10 (CLG2) - H138-29 (E) 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)      		 -
      H138-10 (CLG2) - H138-29 (E) 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. Passenger Side Lock Sensor
      H138-10 (CLG2) - H138-29 (E) 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. Passenger Side Unlock Sensor
      H138-9 (CG2B) - H138-29 (E) 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)      		 -
      M106-4 (CLG8) - H138-29 (E) 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. Back door opener switch assembly off → on
      		 Pulse generation
      (See waveform 7)      		 -
      M106-3 (CG8B) - H138-29 (E) 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. Back door opener switch assembly off → on
      		 Pulse generation
      (See waveform 8)      		 -
      M106-16 (TSW5) - H138-29 (E) Back door opener switch assembly (open switch) signal input Back door opener switch assembly (open switch) off → on Pulse generation
      (See waveform 9)      		 Smart Key 
      1. Trunk Lid/Back Door Unlock Switch
      M106-17 (TSW6) - H138-29 (E) Back door opener switch assembly (lock switch) signal input Back door opener switch assembly (lock switch) off → on Pulse generation
      (See waveform 9)      		 Smart Key 
      1. Trunk Lid/Back Door Lock Switch
      M106-21 (RCO) - H138-29 (E) Output to electrical key and tire pressure monitoring system receiver assembly
      (Power supply for electrical key and tire pressure monitoring system receiver assembly. 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)      		 -
      M106-11 (RDAM) - H138-29 (E) Electrical key and tire pressure monitoring system receiver assembly verifies data received from electrical key transmitter sub-assembly.
      Electrical key and tire pressure monitoring system receiver assembly sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Electrical key and tire pressure monitoring system receiver assembly 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)      		 -
      M106-12 (CSEL) - H138-29 (E) Communication channel switching circuit Procedure:
      1. Ignition switch off
      2. All doors closed
      		 Below 1 V → Pulse generation -
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [11/2023 - ] 

    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.

      GTY1009052Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 1 (REFERENCE)

      Item Content
      Tester Connection H138-16 (CLG1) - H138-29 (E)
      H138-10 (CLG2) - H138-29 (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*)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [11/2023 - ] 

    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.

      GTY1009615Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 2 (REFERENCE)

      Item Content
      Tester Connection H138-16 (CLG1) - H138-29 (E)
      H138-10 (CLG2) - H138-29 (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 outside detection area*)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [11/2023 - ] 

    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.

      GTY1010165Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Lock sensor not touched
      *b Lock sensor touched
      WAVEFORM 3 (REFERENCE)

      Item Content
      Tester Connection H138-16 (CLG1) - H138-29 (E)
      Tool Setting 5 V/DIV., 100 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. Driver door lock sensor not touched → touched
      Item Content
      Tester Connection H138-10 (CLG2) - H138-29 (E)
      Tool Setting 5 V/DIV., 100 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. Front passenger door lock sensor not touched → touched
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [11/2023 - ] 

    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.

      GTY1009086Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Unlock sensor not touched
      *b Unlock sensor touched
      WAVEFORM 4 (REFERENCE)

      Item Content
      Tester Connection H138-16 (CLG1) - H138-29 (E)
      Tool Setting 5 V/DIV., 100 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. Driver door unlock sensor not touched → touched
      Item Content
      Tester Connection H138-10 (CLG2) - H138-29 (E)
      Tool Setting 5 V/DIV., 100 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. Front passenger door 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.

      GTY1010037Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 5 (REFERENCE)

      Item Content
      Tester Connection H138-15 (CG1B) - H138-29 (E)
      H138-9 (CG2B) - H138-29 (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*)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [11/2023 - ] 

    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.

      GTY1009520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 6 (REFERENCE)

      Item Content
      Tester Connection H138-15 (CG1B) - H138-29 (E)
      H138-9 (CG2B) - H138-29 (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 outside detection area*)
      1. *: For details about the entry function detection area, refer to Operation Check.

        Refer to OPERATION CHECK [11/2023 - ] 

    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.

      GTY1009967Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 7 (REFERENCE)

      Item Content
      Tester Connection M106-4 (CLG8) - H138-29 (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 closed
      4. Back door opener switch assembly 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.

      GTY1009226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      WAVEFORM 8 (REFERENCE)

      Item Content
      Tester Connection M106-3 (CG8B) - H138-29 (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 closed
      4. Back door opener switch assembly 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.

      GTY1006310Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Checking for switch on signal at short intervals
      *b Before back door opener switch assembly pressed
      *c After back door opener switch assembly pressed
      WAVEFORM 9 (REFERENCE)

      Item Content
      Tester Connection M106-16 (TSW5) - H138-29 (E)
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition Back door opener switch assembly (open switch) off → on
      Item Content
      Tester Connection M106-17 (TSW6) - H138-29 (E)
      Tool Setting 2 V/DIV., 500 ms./DIV.
      Condition Back door opener switch assembly (lock switch) off → on
    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.

      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 10 (REFERENCE)

      Item Content
      Tester Connection M106-21 (RCO) - H138-29 (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
    15. Using an oscilloscope, check waveform 11.
      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 11 (REFERENCE)

      Item Content
      Tester Connection M106-11 (RDAM) - H138-29 (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
  2. CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    GTY1177775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

      Refer to REMOVAL [11/2023 - ]

    2. Measure the voltage and resistance according to the value (s) in the table below.
      Tester Connection Terminal Description Condition Specified Condition
      MB-13 (GND1) - Body ground Ground Always Below 1 Ω
      MB-26 (BECU) - Body ground Auxiliary battery power supply (for CPU) Ignition switch off 11 to 14 V
  3. SMART KEY SYSTEM (for Start Function) 

    for HV Model: Refer to TERMINALS OF ECU [11/2023 - ]

    for Gasoline Model: Refer to TERMINALS OF ECU [11/2023 - ]

  4. POWER DOOR LOCK CONTROL SYSTEM 

    Refer to TERMINALS OF ECU [11/2023 - ]

  5. WIRELESS DOOR LOCK CONTROL SYSTEM 

    Refer to TERMINALS OF ECU [11/2023 - ]

  6. POWER BACK DOOR SYSTEM (w/ Power Back Door System) 

    Refer to TERMINALS OF ECU [11/2023 - ]

Diesel-Data.com