DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 33 (Smart Key System (For Start, HV) - Diagnostics - Introduction (2 Of 2)) >> SMART KEY SYSTEM (for Start Function, HV Model) >> Terminals Of Ecu [10/2021 - 11/2023] >> Terminals Of Ecu [10/2021 - 11/2023]

Terminals Of Ecu [10/2021 - 11/2023]

WARNING: This page is about a different variant/trim than selected.
  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    GTY857213Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the M5 and H48 certification ECU (smart key ECU assembly) connectors.
    2. Measure the resistance and voltage according to the value(s) in the table below.

      HINT: 

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

      Tester Connection Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      M5-25 (STP1) - Body ground Input Stop light switch signal Brake pedal depressed → Brake pedal released 9 V or higher → 1 V or less Stop Light Switch1
      H48-4 (+B) - H48-18 (E) Input Power source Ignition switch off 11 to 14 V -
      H48-22 (P) - H48-18 (E) Input P position signal Shift lever in P → Shift lever not in P 30 kΩ or higher → Below 200 Ω Shift P Signal
      H48-15 (CUTB) - Body ground Input Dark current cut pin* Ignition switch off 11 to 14 V -
      H48-18 (E) - Body ground - GND Always Below 1 Ω -
      H48-14 (SLP) - H48-18 (E) - GND Always Below 1 Ω -
      H48-21 (SSW2) - Body ground Input SSW2 contact signal
      HINT: 
      Backup for SSW1. Behaves the same way as SSW1.      		 Power switch pushed → Power switch not pushed Below 15 Ω → 10 kΩ or higher Start Switch2
      H48-23 (SSW1) - Body ground Input SSW1 contact signal Power switch pushed → Power switch not pushed Below 15 Ω → 10 kΩ or higher Start Switch1
      H48-19 (SPD) - Body ground Input Vehicle speed signal Always 30 kΩ or higher Vehicle Speed Signal
      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 M5 and H48 certification ECU (smart key ECU assembly) connectors.
    4. Measure the voltage and resistance, 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/DTC
      H48-13 (LIN) - H48-18 (E) Input / Output LIN communication line Ignition switch ON Pulse generation -
      H48-3 (IGB) - H48-18 (E) Output IGB signal Ignition switch off → Ignition switch ON 1 V or less → 8.5 V or higher -
      H48-22 (P) - H48-18 (E) Input P position signal Shift lever in P → Shift lever not in P 9 V or higher → 2.76 V or less Shift P Signal
      H48-21 (SSW2) - H48-18 (E) Input SSW2 contact signal
      HINT: 
      Backup for SSW1. Behaves the same way as SSW1.      		 Power switch not pushed → Power switch pushed 9 V or higher → 1 V or less Start Switch2
      H48-23 (SSW1) - H48-18 (E) Input SSW1 contact signal Power switch not pushed → Power switch pushed 9 V or higher → 1 V or less Start Switch1
      H48-16 (ACCD) - H48-18 (E) Output ACC signal Ignition switch off → Ignition switch ACC 1 V or less → 8.5 V or higher ACC Relay Monitor
      H48-17 (IG1D) - H48-18 (E) Output IG signal Ignition switch ACC → Ignition switch ON 1 V or less → 9 V or higher IG Relay Monitor (Outside)
      H48-19 (SPD) - H48-18 (E) Input Vehicle speed signal Vehicle being driven at approx. 5 km/h (3 mph) Pulse generation
      (See waveform 1)      		 Vehicle Speed Signal
      H48-27 (ST2) - H48-18 (E) Output STSW signal With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released 8.5 V or higher → 1 V or less -
      H48-8 (CLG5) - H48-18 (E) Output Output to No. 1 indoor electrical key antenna assembly (front floor) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 2)      		 -
      H48-9 (CG5B) - H48-18 (E) Output Output to No. 1 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 2)      		 -
      M5-5 (CLG6) - H48-18 (E) Output Output to No. 2 indoor electrical key antenna assembly (rear floor) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 2)      		 -
      M5-6 (CG6B) - H48-18 (E) Output Output to No. 2 indoor electrical key antenna assembly (rear floor) (terminal on opposite side of component from CLG6 output terminal) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 2)      		 -
      M5-11 (CLG7) - H48-18 (E) Output Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment) Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 2)      		 -
      M5-10 (CG7B) - H48-18 (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. Ignition switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 2)      		 -
      H48-5 (TXCT) - H48-11 (AGND) Output Signal output to transponder key amplifier Ignition switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V
      • BCC Malfunction
      • Abnormal Status
      • Different Encrypt Code
      • Different Serial Number
      • Frame Error
      • Response
      H48-6 (CODE) - H48-11 (AGND) Input Signal input from transponder key amplifier Ignition switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V
      H48-7 (VC5) - H48-11 (AGND) Output Transponder key amplifier power supply Ignition switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V
      H48-11 (AGND) - Body ground - Transponder key amplifier ground Always Below 1 Ω
      H48-5 (TXCT) - H48-11 (AGND) Output Signal output to transponder key amplifier
      (Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into power switch, and then transmitted by transponder key amplifier antenna as radio waves)      		 Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed Pulse generation
      (See waveform 3)
      • BCC Malfunction
      • Abnormal Status
      • Different Encrypt Code
      • Different Serial Number
      • Frame Error
      • Response
      H48-6 (CODE) - H48-11 (AGND) Input Signal input from transponder key amplifier
      (Radio waves from transponder key amplifier built into power switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))      		 Ignition switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch
      HINT: 
      Remove the transmitter battery before performing this inspection.      		 Pulse generation
      (See waveform 4)
      H48-7 (VC5) - H48-11 (AGND) Output Transponder key amplifier power supply
      (Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into power switch activated)      		 Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed Pulse generation
      (See waveform 5)
      H48-20 (IND) - H48-18 (E) Output Security indicator output Ignition switch off → ON Pulse generation → Below 2 V -
      M5-7 (WCSW) - H48-18 (E)* Output Wireless charger system stop signal Procedure:
      1. Ignition switch off
      2. Electrical key transmitter sub-assembly inside vehicle
      3. Ignition switch off → ACC
      		 Below 1 V → 4.5 to 6 V
      (For 1 second after ignition switch ACC)      		 -
      1. *: w/ Wireless Charging System
    5. Using an oscilloscope, check the 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
        GTY762053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H48-19 (SPD) - H48-18 (E)
        Tool Setting 5 V/DIV., 20 ms./DIV.
        Condition Vehicle being driven at approx. 5 km/h (3 mph)

        HINT: 

        The wavelength becomes shorter as the vehicle speed increases.

      2. Waveform 2
        GTY426276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a For 30 seconds after any door closed
        *b After 30 seconds or more have elapsed since any door closed
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H48-8 (CLG5) - H48-18 (E)
        H48-9 (CG5B) - H48-18 (E)
        M5-5 (CLG6) - H48-18 (E)
        M5-6 (CG6B) - H48-18 (E)
        M5-11 (CLG7) - H48-18 (E)
        M5-10 (CG7B) - H48-18 (E)
        Tool Setting 2 V/DIV., 500 ms/DIV.
        Condition Procedure:
        1. Ignition switch off
        2. Electrical key transmitter sub-assembly not inside vehicle
        3. Within 30 seconds of closing any door
      3. Waveform 3
        GTY429542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H48-5 (TXCT) - H48-11 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed
      4. Waveform 4
        GTY510289Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Waveform
        *b Waveform (detail)
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H48-6 (CODE) - H48-11 (AGND)
        Tool Setting
        • Waveform

          1 V/DIV., 20 ms./DIV.

        • Waveform (detail)

          2 V/DIV., 100 μs./DIV.
        Condition Ignition switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch*

        HINT: 

        *: Remove the transmitter battery before performing this inspection.

      5. Waveform 5
        GTY426469Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H48-7 (VC5) - H48-11 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed
  2. CHECK ID CODE BOX (IMMOBILISER CODE ECU) 
    GTY937710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the H53 ID code box (immobiliser code ECU) connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.

      HINT: 

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

      Tester Connection Input/Output Terminal Description Condition Specified Condition Related Data List Item
      H53-1 (+B) - Body ground Input Power source Ignition switch off 11 to 14 V -
      H53-5 (GND) - Body ground - Ground Always Below 1 Ω
    3. Connect the H53 ID code box (immobiliser code ECU) 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
      H53-3 (EFII) - H53-5 (GND) Input EFI communication input
      (Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))      		 Ignition switch off 11 to 14 V Smart Key
      • EFI/EV Code Receive
      • Engine/System Start Request
      H53-3 (EFII) - H53-5 (GND) Input EFI communication input
      (Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))      		 Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 1)
      H53-4 (EFIO) - H53-5 (GND) Output EFI communication output
      (Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)      		 Ignition switch off Below 1 V
      H53-4 (EFIO) - H53-5 (GND) Output EFI communication output
      (Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)      		 Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 2)
      H53-2 (LIN1) - H53-5 (GND) Input/Output LIN communication line Ignition switch ON Pulse generation -
    5. Using an oscilloscope, check the waveform.
      NOTE:

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

      1. Waveform 1
        GTY367336Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 160 ms *b Approximately 270 ms
        Item Content
        Tester Connection H53-3 (EFII) - H53-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery
      2. Waveform 2
        GTY384373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 160 ms *b Approximately 270 ms
        Item Content
        Tester Connection H53-4 (EFIO) - H53-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery
  3. CHECK HYBRID VEHICLE CONTROL ECU 
    GTY868654Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      A32-35 (IG2) - H67-3 (E1) Input Ignition power supply Ignition switch ON 11 to 14 V -
      H67-3 (E1) - Body ground - Ground Always Below 1 Ω -
      H67-23 (IMO) - H67-3 (E1) Output EFI communication output
      (Signal output from hybrid vehicle control ECU to ID code box (immobiliser code ECU))      		 Ignition switch off 11 to 14 V
      • EFI/EV Code Receive
      • Engine/System Start Request
      H67-23 (IMO) - H67-3 (E1) Output EFI communication output
      (Signal output from hybrid vehicle control ECU to ID code box (immobiliser code ECU))      		 Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 1)
      H67-10 (IMI) - H67-3 (E1) Input EFI communication input
      (Signal input from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)      		 Ignition switch off 11 to 14 V → 1 V or less
      H67-10 (IMI) - H67-3 (E1) Input EFI communication input
      (Signal input from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)      		 Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 2)
    2. Using an oscilloscope, check the waveform.
      NOTE:

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

      1. Waveform 1 (Reference)
        GTY749966Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 160 ms. *b Approximately 270 ms.
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H67-23 (IMO) - H67-3 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery
      2. Waveform 2 (Reference)
        GTY384373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Approximately 160 ms. *b Approximately 270 ms.
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H67-10 (IMI) - H67-3 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery
  4. CHECK POWER SWITCH 
    GTY914894Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      H50-6 (AGND) - Body ground - Transponder key amplifier ground Always Below 1 Ω -
      H50-7 (TXCT) - H50-6 (AGND) Input Immobiliser communication input Ignition switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
      H50-8 (CODE) - H50-6 (AGND) Output Immobiliser communication output Ignition switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
      H50-10 (VC5) - H50-6 (AGND) Input Transponder key amplifier power supply Ignition switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
    2. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      H50-7 (TXCT) - H50-6 (AGND) Input Signal input from certification ECU (smart key ECU assembly)
      (Code sent from certification ECU (smart key ECU assembly) to transponder key amplifier built into power switch, and then transmitted by transponder key amplifier antenna as radio waves)      		 Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed Pulse generation
      (See waveform 1)
      • BCC Malfunction
      • Abnormal Status
      • Different Encrypt Code
      • Different Serial Number
      • Frame Error
      • Response

        HINT: 

        If immobiliser key code verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above
      H50-8 (CODE) - H50-6 (AGND) Output Signal output to certification ECU (smart key ECU assembly)
      (Radio waves from transponder key amplifier built into power switch used to detect key information. Key information then sent to certification ECU (smart key ECU assembly))      		 Ignition switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch* Pulse generation
      (See waveform 2)
      H50-10 (VC5) - H50-6 (AGND) Input Transponder key amplifier power supply
      (Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into power switch activated)      		 Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed Pulse generation
      (See waveform 3)

      HINT: 

      *: Remove the transmitter battery before performing this inspection.

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

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

      1. Waveform 1 (Reference)
        GTY429541Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H50-7 (TXCT) - H50-6 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed
      2. Waveform 2 (Reference)
        GTY510289Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Waveform
        *b Waveform (detail)
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H50-8 (CODE) - H50-6 (AGND)
        Tool Setting
        • Waveform

          1 V/DIV., 20 ms./DIV.

        • Waveform (detail)

          2 V/DIV., 100 μs./DIV.
        Condition Ignition switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch*

        HINT: 

        *: Remove the transmitter battery before performing this inspection.

      3. Waveform 3 (Reference)
        GTY426468Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection H50-10 (VC5) - H50-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed
Diesel-Data.com