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Home >> Lexus >> 2021 >> UX 250h Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Smart Access System W/ Push-Button Start (Start Function) (Diagnostics - Introduction) (2 Of 2) (Hybrid) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, HV Model) >> Terminals Of Ecu [10/2018 - 08/2021] >> Terminals Of Ecu [10/2018 - 08/2021]

Terminals Of Ecu [10/2018 - 08/2021]

  1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    GTY794715Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the N61 and F44 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 Wiring Color Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      N61-25 (STP1) - Body ground SB - Body ground Input Stop light switch signal Brake pedal depressed → Brake pedal released 9 V or higher → 1 V or less Stop Light Switch1
      F44-4 (+B) - F44-18 (E) SB - W-B Input Power source Power switch off 11 to 14 V -
      F44-22 (P) - F44-18 (E) R - W-B Input P position signal Shift lever in P → Shift lever not in P 30 kΩ or higher → Below 200 Ω Shift P Signal
      F44-15 (CUTB) - Body ground L - Body ground Input Dark current cut pin* Power switch off 11 to 14 V -
      F44-18 (E) - Body ground W-B - Body ground - GND Always Below 1 Ω -
      F44-21 (SSW2) - Body ground G - 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
      F44-23 (SSW1) - Body ground BE - Body ground Input SSW1 contact signal Power switch pushed → Power switch not pushed Below 15 Ω → 10 kΩ or higher Start Switch1
      F44-19 (SPD) - Body ground B - 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 N61 and F44 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 Wiring Color Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      F44-14 (SLP) - F44-18 (E) V - W-B Input Steering lock position signal Steering locked → Steering unlocked 11 to 14 V → 1.5 V or less Steering Unlock Switch
      F44-25 (SLR+) - F44-18 (E) P - W-B Output Steering lock motor operation command signal
      (Steering lock motor operation permission signal sent from the certification ECU (smart key ECU assembly))      		 When a door is opened, the steering lock motor will be operated if all of the following conditions are met:
      • The steering is unlocked.
      • The power switch is off.
      • The shift lever is in P.
      		 Pulse generation
      (See waveform 1)      		 -
      F44-13 (LIN) - F44-18 (E) GR - W-B Input / Output LIN communication line Power switch on (IG) Pulse generation Steering Lock Start Cond
      F44-3 (IGB) - F44-18 (E) LG - W-B Output IGB signal Power switch off → Power switch on (IG) 1 V or less → 8.5 V or higher -
      F44-22 (P) - F44-18 (E) R - W-B 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
      F44-21 (SSW2) - F44-18 (E) G - W-B 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
      F44-23 (SSW1) - F44-18 (E) BE - W-B Input SSW1 contact signal Power switch not pushed → Power switch pushed 9 V or higher → 1 V or less Start Switch1
      F44-16 (ACCD) - F44-18 (E) R - W-B Output ACC signal Power switch off → Power switch on (ACC) 1 V or less → 8.5 V or higher ACC Relay Monitor
      F44-17 (IG1D) - F44-18 (E) GR - W-B Output IG signal Power switch on (ACC) → Power switch on (IG) 1 V or less → 9 V or higher IG Relay Monitor (Outside)
      F44-19 (SPD) - F44-18 (E) B - W-B Input Vehicle speed signal Vehicle being driven at approx. 5 km/h (3 mph) Pulse generation
      (See waveform 2)      		 Vehicle Speed Signal
      F44-27 (ST2) - F44-18 (E) B - W-B 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 -
      F44-8 (CLG5) - F44-18 (E) SB - W-B Output Output to No. 1 indoor electrical key antenna assembly (front floor) Procedure:
      1. Power switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      F44-9 (CG5B) - F44-18 (E) GR - W-B Output Output to No. 1 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal) Procedure:
      1. Power switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      N61-5 (CLG6) - F44-18 (E) GR - W-B Output Output to No. 2 indoor electrical key antenna assembly (rear floor) Procedure:
      1. Power switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      N61-6 (CG6B) - F44-18 (E) BR - W-B Output Output to No. 2 indoor electrical key antenna assembly (rear floor) (terminal on opposite side of component from CLG6 output terminal) Procedure:
      1. Power switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      N61-10 (CG7B) - F44-18 (E) R - W - B Output Output to No. 1 indoor electrical key antenna assembly (inside luggage) Procedure:
      1. Power switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      N61-11 (CLG7) - F44-18 (E) G - W - B Output Output to No. 1 indoor electrical key antenna assembly (inside luggage) (terminal on opposite side of component from CLG7 output terminal) Procedure:
      1. Power switch off
      2. Electrical key transmitter sub-assembly not inside vehicle
      3. Within 30 seconds of closing any door
      		 Pulse generation
      (See waveform 3)      		 -
      F44-5 (TXCT) - F44-11 (AGND) LG - W Output Signal output to transponder key amplifier Power 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
      F44-6 (CODE) - F44-11 (AGND) L - W Input Signal input from transponder key amplifier Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V
      F44-7 (VC5) - F44-11 (AGND) V - W Output Transponder key amplifier power supply Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V
      F44-11 (AGND) - Body ground W - Body ground - Transponder key amplifier ground Always Below 1 Ω
      F44-5 (TXCT) - F44-11 (AGND) LG - W 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)      		 Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed Pulse generation
      (See waveform 4)
      • BCC Malfunction
      • Abnormal Status
      • Different Encrypt Code
      • Different Serial Number
      • Frame Error
      • Response
      F44-6 (CODE) - F44-11 (AGND) L - W 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))      		 Power 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 5)
      F44-7 (VC5) - F44-11 (AGND) V - W Output Transponder key amplifier power supply
      (Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into power switch activated)      		 Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed Pulse generation
      (See waveform 6)
      F44-20 (IND) - F44-18 (E) W - W-B Output Security indicator output Power switch off → on (IG) Pulse generation → Below 2 V -
      N61-7 (WCSW) - F44-18 (E)* L - W-B Output Wireless charger system stop signal Procedure:
      1. Power switch off
      2. Electrical key transmitter sub-assembly inside vehicle
      3. Power switch off → on (ACC)
      		 Below 1 V → 4.5 to 6 V
      (For 1 second after power switch on (ACC))      		 -
      1. *: w/ Wireless Charging System

      HINT: 

      • The waveform of the steering lock actuator motor stopped can be checked without performing any particular operation.
      • The waveform of the steering lock actuator motor operating can be checked if either of the following operations is performed:
        • To unlock the steering, bring the electrical key transmitter sub-assembly into the cabin and turn the power switch on (ACC) or on (IG).
        • To lock the steering, open a door with the power switch off and the shift lever in P.
    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
        GTY825549Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Steering lock motor not operating
        *b Steering lock motor operating
        MEASUREMENT CONDITION

        Item Content
        Tester Connection F44-25 (SLR+) - F44-18 (E)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition When a door is opened, the steering lock motor will be operated if all of the following conditions are met:
        • The steering is unlocked.
        • The power switch is off.
        • The shift lever is in P.
      2. Waveform 2
        GTY762053Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection F44-19 (SPD) - F44-18 (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.

      3. Waveform 3
        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 F44-8 (CLG5) - F44-18 (E)
        F44-9 (CG5B) - F44-18 (E)
        N61-5 (CLG6) - F44-18 (E)
        N61-6 (CG6B) - F44-18 (E)
        N61-11 (CLG7) - F44-18 (E)
        N61-10 (CG7B) - F44-18 (E)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Procedure:
        1. Power switch off
        2. Electrical key transmitter sub-assembly not inside vehicle
        3. Within 30 seconds of closing any door
      4. Waveform 4
        GTY429542Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection F44-5 (TXCT) - F44-11 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed
      5. Waveform 5
        GTY510289Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Waveform
        *b Waveform (detail)
        MEASUREMENT CONDITION

        Item Content
        Tester Connection F44-6 (CODE) - F44-11 (AGND)
        Tool Setting
        • Waveform

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

        • Waveform (detail)

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

        HINT: 

        *: Remove the transmitter battery before performing this inspection.

      6. Waveform 6
        GTY426469Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        MEASUREMENT CONDITION

        Item Content
        Tester Connection F44-7 (VC5) - F44-11 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed
  2. CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) 
    GTY816947Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F45 steering lock ECU (steering lock actuator or upper bracket assembly) 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.

      Terminal No. (Symbol) Wiring Color Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      F45-1 (GND) - Body ground W-B - Body ground - Ground Always Below 1 Ω -
      F45-6 (IG2) - F45-1 (GND) BE - W-B Input IG signal (IG2 power supply input for steering lock motor) Power switch off Below 1 V -
      Power switch on (IG) 11 to 14 V
      F45-7 (B) - Body ground L - Body ground Input Constant power supply Power switch off 11 to 14 V -
    3. Connect the F45 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
    4. Measure the voltage, and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      F45-3 (IGE) - F45-1 (GND) P - W-B Input Steering lock motor operation permission signal (motor operation permission signal supplied by certification ECU (smart key ECU assembly)) Steering lock motor operating when all conditions met, and then door opened:
      • Shift lever in P
      • Steering unlocked
      • Power switch turned off
      		 Pulse generation
      (See waveform 1)
      • Power Supply Short
      • Unlock Request Receive
      • Lock Request Receive
      F45-4 (SLP1) - F45-1 (GND) V - W-B Output Steering lock bar position signal (signal output from steering unlock sensor) Steering locked → unlocked 11 to 14 V → Below 1.5 V Sensor Value
      F45-5 (LIN) - F45-1 (GND) SB - W-B Input / Output LIN communication line Power switch on (IG) Pulse generation Steering Lock Start Cond

      HINT: 

      • There is 1 motor and 2 sensors built into the steering lock actuator or upper bracket assembly.
      • When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
      • In order to take measurements when the lock motor is operating, perform either of the following operations:
        • To unlock the steering, carry the key and turn the power switch on (ACC) or on (IG).
        • To lock the steering, turn the power switch off with the shift lever in P, and then open a door.
    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 (Reference)
        GTY367544Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Steering lock motor not operating
        *b Steering lock motor operating
        MEASUREMENT CONDITION

        Item Content
        Tester Connection F45-3 (IGE) - F45-1 (GND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Steering lock motor operating when all conditions met, and then door opened:
        • Shift lever in P
        • Steering unlocked
        • Power switch turned off
  3. CHECK ID CODE BOX (IMMOBILISER CODE ECU) 
    GTY786292Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the F48 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 Wiring Color Input/Output Terminal Description Condition Specified Condition Related Data List Item
      F48-1 (+B) - Body ground B - Body ground Input Power source Power switch off 11 to 14 V -
      F48-5 (GND) - Body ground B - Body ground - Ground Always Below 1 Ω
    3. Reconnect the F48 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 Wiring Color Input/Output Terminal Description Condition Specified Condition Related Data List Item
      F48-3 (EFII) - F48-5 (GND) B - B Input EFI communication input
      (Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))      		 Power switch off 11 to 14 V Smart Access
      • EFI Code Receive
      • Engine Start Request
      F48-3 (EFII) - F48-5 (GND) B - B 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 power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 1)
      F48-4 (EFIO) - F48-5 (GND) B - B Output EFI communication output
      (Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)      		 Power switch off Below 1 V
      F48-4 (EFIO) - F48-5 (GND) B - B 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 power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 2)
      F48-2 (LIN1) - F48-5 (GND) B - B Input/Output LIN communication line Power switch on (IG) Pulse generation Smart Access
      • Steering Lock Start Cond
    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 F48-3 (EFII) - F48-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) 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 F48-4 (EFIO) - F48-5 (GND)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery
  4. CHECK HYBRID VEHICLE CONTROL ECU 
    GTY810478Courtesy 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) Wiring Color Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      F60-35 (IG2) - F59-3 (E1) BE - W-B Input Ignition power supply Power switch on (IG) 11 to 14 V -
      F59-3 (E1) - Body ground W-B - Body ground - Ground Always Below 1 Ω -
      F59-23 (IMO) - F59-3 (E1) B - W-B Output EFI communication output
      (Signal output from hybrid vehicle control ECU to ID code box (immobiliser code ECU))      		 Power switch off 11 to 14 V
      • EFI Code Receive
      • Engine Start Request
      F59-23 (IMO) - F59-3 (E1) B - W-B 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 power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery Pulse generation
      (See waveform 1)
      F59-10 (IMI) - F59-3 (E1) B - W-B Input EFI communication input
      (Signal input from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)      		 Power switch off 11 to 14 V → 1 V or less
      F59-10 (IMI) - F59-3 (E1) B - W-B 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 power switch turned on (IG) 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 F59-23 (IMO) - F59-3 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) 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 F59-10 (IMI) - F59-3 (E1)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Within 3 seconds of hybrid control system start or within 3 seconds of power switch turned on (IG) after cable disconnected and reconnected to auxiliary battery
  5. CHECK POWER SWITCH 
    GTY814442Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      F124-6 (AGND) - Body ground W - Body ground - Transponder key amplifier ground Always Below 1 Ω -
      F124-7 (TXCT) - F124-6 (AGND) LG - W Input Immobiliser communication input Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
      F124-8 (CODE) - F124-6 (AGND) L - W Output Immobiliser communication output Power switch off, brake pedal not depressed, 30 seconds or more after driver door opened and then closed Below 1 V -
      F124-10 (VC5) - F124-6 (AGND) V - W Input Transponder key amplifier power supply Power 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) Wiring Color Input / Output Terminal Description Condition Specified Condition Related Data List Item/DTC
      F124-7 (TXCT) - F124-6 (AGND) LG - W 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)      		 Power 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
      F124-8 (CODE) - F124-6 (AGND) L - W 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))      		 Power switch off, power switch pressed with electrical key transmitter sub-assembly held near power switch* Pulse generation
      (See waveform 2)
      F124-10 (VC5) - F124-6 (AGND) V - W Input Transponder key amplifier power supply
      (Power supplied from certification ECU (smart key ECU assembly) when transponder key amplifier built into power switch activated)      		 Power 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 F124-7 (TXCT) - F124-6 (AGND)
        Tool Setting 2 V/DIV., 20 ms./DIV.
        Condition Power 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 F124-8 (CODE) - F124-6 (AGND)
        Tool Setting
        • Waveform

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

        • Waveform (detail)

          2 V/DIV., 100 μs./DIV.
        Condition Power 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 F124-10 (VC5) - F124-6 (AGND)
        Tool Setting 2 V/DIV., 200 ms./DIV.
        Condition Power switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed
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