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Home >> Lexus >> 2021 >> UX 250h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> 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) >> Data List / Active Test [07/2022 - ] >> Data List / Active Test [07/2022 - ]

Data List / Active Test [07/2022 - ]

  1. DATA LIST 
    NOTE:
    • In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
    • When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.

    HINT: 

    Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / (desired system) / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Power Source Control > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Shift P Signal Shift position P OFF or ON OFF: Shift lever not in P
      ON: Shift lever in P
      Use this item to determine if the park/neutral position switch assembly is malfunctioning.
      Steering Unlock Switch - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Stop Light Switch1 State of brake pedal OFF or ON OFF: Brake pedal released
      ON: Brake pedal depressed
      • Use this item to determine if the stop light switch assembly is malfunctioning.
      • The engine cannot be started when this item is OFF.
      • If the stop light switch assembly is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.
      Start Switch1 Engine switch 1 status OFF or ON OFF: Engine switch not pressed
      ON: Engine switch pressed
      • If the engine switch is pressed for a short time, the display may not change.
      • Use this item to determine if the engine switch input signal is malfunctioning.
      Start Switch2 Engine switch 2 status OFF or ON OFF: Engine switch not pressed
      ON: Engine switch pressed
      • If the engine switch is pressed for a short time, the display may not change.
      • Use this item to determine if the engine switch input signal is malfunctioning.
      Start Switch3 Engine switch 3 status OFF or ON OFF: Engine switch not pressed
      ON: Engine switch pressed
      • If the engine switch is pressed for a short time, the display may not change.
      • Use this item to determine if the engine switch input signal is malfunctioning.
      Neutral SW/ Clutch SW Shift position (P and N) OFF or ON OFF: Shift lever in any position other than P or N
      ON: Shift lever in P or N
      • Use this item to determine if the park/neutral position switch assembly is malfunctioning.
      • When the engine cannot be started due to a park/neutral position switch assembly malfunction, OFF is displayed.
      Latch Circuit Status of IG related backup circuits OFF or ON OFF: Power switch off
      ON: Power switch on (IG)
      • Operates in almost the same manner as the IG relay.
      • When the engine switch is on (ACC), OFF is displayed.
      Starter Request Signal Engine start request signal status OFF or ON OFF: The engine switch is not pressed
      ON: With the shift lever in P and the brake pedal depressed, the engine switch is pressed and held
      • When the engine cannot be started due to a start request signal malfunction, OFF is displayed.
      • When the engine switch is pressed, the duration of time that ON is displayed will be extremely short. As such, the engine switch needs to be pressed and held for a certain period of time.
      ACC Relay Monitor ACC relay activation OFF or ON OFF: Power switch off
      ON: Power switch on (ACC)
      • When the engine switch is on (IG), ON is displayed.
      • While the engine is cranking, OFF is displayed.
      Engine/EV System Condition Engine state Stop or Run Stop: Engine stopped
      Run: Engine running
      -
      Vehicle Speed Signal Vehicle being driven or stopped Stop or Run Stop: Vehicle stopped
      Run: Vehicle being driven at 5 km/h (3 mph) or more
      -
      Power Supply Condition Power supply state All OFF, ACC ON, IG ON or ST ON All OFF: Power switch off (ACC and IG)
      ACC ON: Power switch on (ACC)
      IG ON: Power switch on (IG)
      ST ON: Sending engine start request signal
      -
      Powertrain Type Vehicle identification HV-AT, Cnv-MT, Cnv-AT, Cnv-MMT, S&S-MT, S&S-AT, S&S-MMT or PHV-AT Cnv-AT: Conventional A/T model (w/o Hybrid System) -
      Park Signal Mismatch P position signal malfunction No or Yes No: Signal normal
      Yes: Signal malfunction (signals via CAN communication and direct line do not match)
      Even when Yes is displayed, it is still possible to turn the engine switch off (the power source mode will not be stuck in on (ACC) or on (IG)).
      Str Lock/Unlock Wait T-Out - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Key Certif Wait T-Out Key verification malfunction No or Yes No: Verification normal
      Yes: Verification error (Detected due to the electrical key transmitter sub-assembly ID code and the ID code stored in the certification ECU (smart key ECU assembly) not matching)
      When the engine cannot be started due to a key verification error, Yes is displayed.
      IG Circuit IG relay coil circuit malfunction OK or NG OK: Circuit normal
      NG: Circuit malfunctioning
      • Use this item to determine if the IG relay is malfunctioning.
      • When the engine cannot be started due to an IG relay malfunction, NG is displayed.
      IG Relay Monitor (Outside) IG relay coil voltage monitor status OFF or ON OFF: Power switch off
      ON: Power switch on (IG)
      • Use this item to determine if the IG relay is malfunctioning.
      • When the engine switch is on (ACC), OFF is displayed.
      IG Relay Monitor (Inside) IG relay activation OFF or ON OFF: Power switch off
      ON: Power switch on (IG)
      • Use this item to determine if the IG relay is malfunctioning.
      • When the engine switch is on (ACC), OFF is displayed.
      Number of Diagnosis Code Number of DTCs 0 to 255 - -
      GTY1131239Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      To check if the Data List display changes, get into the vehicle while carrying an electrical key transmitter sub-assembly and perform the following operations with the engine switch off and the shift lever in P. 

      • *1: Press the engine switch with the brake pedal released and check that the engine switch turns on (ACC).
      • *2: Press the engine switch with the brake pedal released and check that the engine switch turns on (IG).
      • *3: Depress the brake pedal (stop light switch assembly is on).
      • *4: Press the engine switch with the brake pedal depressed and check that the engine starts.
      • *5: Press the engine switch with the brake pedal depressed and check that the engine switch turns off.
      • *6: Release the brake pedal.
      • *7: Open a door.

      Body Electrical > Smart Access > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      No Response Communication response No or Yes No: Communication normal
      Yes: Communication malfunction
      The vehicle IDs registered in the vehicle and electrical key transmitter sub-assembly match, but there is no response from the electrical key transmitter sub-assembly. (If the electrical key transmitter sub-assembly is not in the detection area or the transmitter battery is depleted resulting in a matching code not being detected when a lock switch or the engine switch is pressed, etc., "Yes" is displayed for "No Response" in the Data List. If there is wave interference in the LF band that the vehicle uses for transmission or the RF band that the electrical key transmitter sub-assembly uses for transmission, "Yes" may be displayed for "No Response" in the Data List.)
      Other potential causes:
      • An electrical key transmitter sub-assembly from a different vehicle is being used.
      • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) is malfunctioning.
      Key Low Battery Transmitter battery depleted No or Yes No: Transmitter battery not depleted
      Yes: Transmitter battery depleted
      The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. "Yes" is displayed for the Data List item "Key Low Battery" when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new).
      # Codes Number of DTCs 0 to 255 - -
      Immobilizer when IG=ON Immobiliser function status when power switch on (IG) UNSET or SET UNSET: Immobiliser function not set with power switch on (IG) or immobiliser function unset 40 times after immobiliser function set
      SET: Immobiliser function set (driver door opened and closed with power switch on (IG))
      -
      Immobiliser Immobiliser function status determined by certification ECU (smart key ECU assembly)*6 Set or Unset Set: Immobiliser set (engine start prohibited) (engine switch off)
      Unset: Immobiliser unset (engine start permitted) (power switch on (ACC) or on (IG))
      The engine cannot be started when Set is displayed.
      HINT: 
      • The security indicator light blinks when Set is displayed.
      • The security indicator light is linked with set/unset of the immobiliser.
      Master Key Matching of master key ID code and ID code registered in certification ECU (smart key ECU assembly) NoMatch or Match NoMatch: ID code of master key does not match ID code registered in certification ECU (smart key ECU assembly)
      Match: ID code of master key matches ID code registered in certification ECU (smart key ECU assembly)
      -
      Sub Key Matching of sub key ID code and ID code registered in certification ECU (smart key ECU assembly) NoMatch or Match NoMatch: ID code of sub key does not match ID code registered in certification ECU (smart key ECU assembly)
      Match: ID code of sub key matches ID code registered in certification ECU (smart key ECU assembly)
      -
      BCC Malfunction BCC signal status of transponder chip*1 OK or NG OK: BCC signal normal
      NG: BCC signal malfunction (malfunction in code computation in electrical key transmitter sub-assembly/certification ECU (smart key ECU assembly))
      Problems may be caused by the following:
      • Communication errors due to wave interference (LF).
      • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.
      Abnormal Status Transponder chip status signal*1 OK or NG OK: Transponder chip status signal normal
      NG: Transponder chip status signal malfunction (malfunction in code computation in electrical key transmitter sub-assembly/certification ECU (smart key ECU assembly))
      Problems may be caused by the following:
      • Communication errors due to wave interference (LF).
      • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.
      Different Encrypt Code Matching of transponder chip code and certification ECU (smart key ECU assembly) code*1 OK or NG OK: Codes of transponder chip and certification ECU (smart key ECU assembly) match
      NG: Codes of transponder chip and certification ECU (smart key ECU assembly) do not match
      Problems may be caused by the following:
      • An electrical key transmitter sub-assembly from a different vehicle is being used.
      • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.
      Different Serial Number Vehicle serial number*1 OK or NG OK: Signal from transponder chip and vehicle serial number stored in the certification ECU (smart key ECU assembly) match
      NG: Signal from transponder chip and vehicle serial number stored in the certification ECU (smart key ECU assembly) do not match
      Problems may be caused by the following:
      • An electrical key transmitter sub-assembly from a different vehicle is being used.
      • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.
      Frame Error State of data sent from electrical key transmitter sub-assembly OK or NG OK: No problem with data sent from electrical key transmitter sub-assembly
      NG: Problem with data sent from electrical key transmitter sub-assembly
      Problems may be caused by the following:
      • Communication errors due to wave interference.
      • The electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly) malfunctioning.
      Response Electrical key transmitter sub-assembly response to signal from certification ECU (smart key ECU assembly) OK or NG OK: Electrical key transmitter sub-assembly responds to signal from certification ECU (smart key ECU assembly)
      NG: Electrical key transmitter sub-assembly does not respond to signal from certification ECU (smart key ECU assembly)
      Problems may be caused by the following:
      • A key from a different vehicle is being used.
      • The electrical key transmitter sub-assembly, certification ECU (smart key ECU assembly) or engine switch malfunctioning.
      Wireless Starter Com ID Certification between remote engine start ECU and certification ECU (smart key ECU assembly) No Regd or Regd No Regd: Certification between remote engine start ECU and certification ECU (smart key ECU assembly) not complete
      Regd: Certification between remote engine start ECU and certification ECU (smart key ECU assembly) complete
      -
      Wireless C Code Registration status between remote engine start ECU and certification ECU (smart key ECU assembly) No Regd or Regd No Regd: Remote starter ID not registered to remote engine start ECU and certification ECU (smart key ECU assembly)
      Regd: Remote starter ID registered to remote engine start ECU and certification ECU (smart key ECU assembly)
      Problems may be caused by the following:
      • DTC B2779 is stored.
      • Remote engine start ECU registration has not been performed.
      • Malfunctions in the certification ECU (smart key ECU assembly) or remote engine start ECU.
      Steering Lock Sleep Cond - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Steering Lock Start Cond - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Engine/System Start Condition - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Sensor Value - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Power Supply Short - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Motor Driver Short - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Lock/Unlock Receive - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Lock Bar Stuck Error - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      ID-BOX Sleep Condition ID code box (immobiliser code ECU) sleep mode status*6 No or Yes No: ID code box (immobiliser code ECU) sleep mode not possible
      Yes: ID code box (immobiliser code ECU) sleep mode possible
      -
      ID-BOX Start Condition ID code box (immobiliser code ECU) status*2 No or Yes No: Wake-up signal not sent by ID code box (immobiliser code ECU)
      Yes: Wake-up signal sent by ID code box (immobiliser code ECU)
      -
      Engine/System Start Request Immobiliser unset (engine start permitted) signal from certification ECU (smart key ECU assembly) to ID code box (immobiliser code ECU) received state*6 OK or NG OK: Signal received
      NG: Signal not received
      • The ID code box (immobiliser code ECU) receives the immobiliser unset (engine start permitted) signal from the certification ECU (smart key ECU assembly) and engine start permitted when OK is displayed.
      • The engine cannot be started when NG is displayed.
      3bit Code Request 3-bit code request condition OK or NG OK: 3-bit code request condition signal received
      NG: 3-bit code request condition signal not received
      -
      S Code Check S code verification result*4 OK or NG OK: Verification result normal
      NG: Verification result abnormal
      When NG is displayed:
      • The ID code for the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is not registered, or the certification ECU (smart key ECU assembly) or ID code box (immobiliser code ECU) is malfunctioning.
      • The engine cannot be started.
      L Code Check L code verification result*5 OK or NG OK: Verification result normal
      NG: Verification result abnormal
      When NG is displayed:
      • The ID code box (immobiliser code ECU) is malfunctioning.
      • The engine cannot be started.
      Unlock Request Receive - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Lock Request Receive - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      S Code Check(Past) Verification result history S code*4 OK or NG(Past) OK: History of abnormal verification result does not exist
      NG(Past): History of abnormal verification result exists
      -
      L Code Check(Past) Verification result history L code*5 OK or NG(Past) OK: History of abnormal verification result does not exist
      NG(Past): History of abnormal verification result exists
      -
      Steering Lock - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      Steering Unlock - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      EFI/EV Code Receive Certification information sent to ID code box (immobiliser code ECU) from ECM when ECM receives engine start permission signal from ID code box (immobiliser code ECU)*3,*6 OK or NG OK: Signal from ECM to unset immobiliser received by ID code box (immobiliser code ECU)
      NG: Signal from ECM to unset immobiliser not received by ID code box (immobiliser code ECU)
      -
      EFI/EV ECU Communication State of communication to unset immobiliser between certification ECU (smart key ECU assembly) and ECM OK or NG OK: Communication to unset immobiliser has started between certification ECU (smart key ECU assembly) and ECM
      NG: Communication to unset immobiliser has not started between certification ECU (smart key ECU assembly) and ECM
      If this item displays "NG" even though the conditions to unset the immobiliser have been met and the value of Data List item "Engine Start Request" is "OK", the ECM may be malfunctioning. When the engine cannot be started, use this Data List item during troubleshooting.
      R Code Check Verification result between the DCM (telephone transceiver assembly) and ID code box (immobiliser code ECU) OK or NG OK: Verification result normal
      NG: Verification result abnormal
      Not applicable
      B Code Difference B code mismatch No or Yes No: Communication normal
      Yes: Communication malfunction
      -
      B Code B code registration status No Regd or Regd No Regd: B code not registered correctly
      Regd: B code registered correctly
      -
      Vehicle ID (Key Registration) Status of vehicle ID (key registration) OK or NG OK: Vehicle ID registered to key
      NG: Vehicle ID not registered to key
      -
      S/L Code Registration Status Status of S/L code registration OK or NG OK: S/L code registration was completed normally
      NG: S/L code registration was not completed normally
      -
      Number of Registered Key Codes Number of registered electrical key transmitter sub-assemblies 0 to 8 Number of registered electrical key transmitter sub-assemblies Up to 4 electrical key transmitter sub-assemblies can be registered.
      Open in IG2 - - - Although the item is displayed on the Techstream, it is not applicable to this vehicle.
      EFI/EV ECU Communication Code Status Status of EFI communication code OK or NG OK: Signal from ECM was correct
      NG: Signal from ECM was incorrect
      -
      EFI/EV ECU Communication Status Status of EFI communication OK or NG OK: Communication normal between certification ECU (smart key ECU assembly) and ECM
      NG: Communication malfunction between certification ECU (smart key ECU assembly) and ECM
      -
      EFI/EV ECU Communication Speed Status of EFI communication speed OK or NG OK: Communication speed normal
      NG: Communication speed abnormal
      -
      ID-Box Wait Status Wait status of ID code box OFF or ON ON: ID code box waiting
      OFF: ID code box not waiting
      -

      HINT: 

      • *1: This indicates that there is a problem with the communication format between the electrical key transmitter sub-assembly and certification ECU (smart key ECU assembly). Wave interference, malfunction of the electrical key transmitter sub-assembly or certification ECU (smart key ECU assembly), an electrical key transmitter sub-assembly from different vehicle being used, etc. are possible causes.
      • *2: This indicates that transmission of the wake-up signal is possible ("Yes" indicates that the signal to begin verification-related LIN communication is being sent). When communication is being performed between the certification ECU (smart key ECU assembly) and ECM, the display changes to "Yes".
      • *3: This indicates that the engine start permission request signal (EGST) output from the ECM is being received by the ID code box (immobiliser code ECU).
      • *4: This indicates the certification result of the certification codes of the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU).
      • *5: When not equipped with a steering lock ECU, a pseudo verification result is displayed for the steering lock ECU and ID code box (immobiliser code ECU).

        Normally, "NG" is not displayed.

      • *6: Refer to the following Data List items when inspecting the actual vehicle.
      GTY1131884Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      To check if the Data List display changes, get into the vehicle while carrying an electrical key transmitter sub-assembly and perform the following operations with the engine switch off and the shift lever in P.

      • *1: Press the engine switch with the brake pedal released and check that the engine switch turns on (ACC).
      • *2: Press the engine switch with the brake pedal released and check that the engine switch turns on (IG).
      • *3: Press the engine switch with the brake pedal released and check that the engine starts.
      • *4: Press the engine switch and check that the engine switch turns off.

      Body Electrical > Starting Control > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Starter SW Starter operation request OFF or ON OFF: Starter operation not requested
      ON: Starter operation requested
      When OFF is displayed, the engine will not crank.
      Shift Position P or N Park/Neutral position switch status OFF or ON OFF: Shift lever not in P or N
      ON: Shift lever in P or N
      When OFF is displayed, the engine will not crank.
      Starter Relay Starter relay voltage monitor OFF or ON OFF: ST relay off
      ON: ST relay on
      When OFF is displayed the engine cannot be cranked.
      Starting Control SW Starter request signal monitor OFF or ON OFF: Starting control switch off
      ON: Starting control switch on
      When OFF is displayed, the engine cannot be cranked.
      Ignition IG2 status OFF or ON OFF: IG2 relay off
      ON: IG2 relay on
      -
      Engine Speed Engine speed 0 to 16383 rpm Fluctuates in accordance with actual engine speed -
      Number of DTCs Number of DTCs 0 to 255 - -
      GTY454184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT: 

      *: With the power switch on (IG), the shift lever in P and the brake pedal depressed, press the engine switch and check that the engine starts.

      Body Electrical > Combination Meter > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Vehicle Speed Meter Vehicle speed Min.: 0, Max.: 255 Almost same as actual vehicle speed (Speedometer tester) -

      Body Electrical > Main Body > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      FL Door Courtesy SW Front door LH courtesy light switch signal OFF or ON OFF: Front door LH closed
      ON: Front door LH open
      -
    6. Enter the following menus: Powertrain / Engine / Data List.
    7. Read the Data List according to the display on the Techstream.

      Powertrain > Engine > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Stop Light SW except Manual Transaxle 
      1. Brake pedal signal
      OFF or ON OFF: Brake pedal released
      ON: Brake pedal depressed
      -
      Immobiliser Fuel Cut Status Status of immobiliser fuel cut OFF or ON - -
  2. ACTIVE TEST 

    HINT: 

    Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / (desired system) / Active Test.
    5. Perform Active Test according to the display on the Techstream.

      Body Electrical > Smart Access > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Immobiliser Indicator Security indicator light OFF/ON -

      Body Electrical > Power Source Control > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      P Supply for Steering Lock Certification ECU (smart key ECU assembly) OFF/ON
      HINT: 
      OFF: Power is not supplied.
      ON: Power is supplied.
      When performing this Active Test, make sure the following condition is met:
      The power switch is on (IG).