2012 Lexus HS 250hFACTORY OEM SERVICE PROCEDURE

Customize Parameters

  1. CUSTOMIZING FUNCTION WITH TECHSTREAM 

    HINT: 

    The items in the table below can be customized.

    NOTE:
    • When the customer requests a change in a function, first make sure that the function can be customized.
    • Be sure to make a note of the current setting before customizing.
    • When troubleshooting a function, first make sure that the function is set to the default setting.
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Customize Setting.
    5. Select the setting by referring to the table below.
      SMART KEY/ACCESS

      Tester Display Default Content Setting
      Ignition Available Area All Function that switches the entry ignition detection area. Front or All*
      Park Wait Time 2.5 s Function that sets waiting time to permit opening the door after the door is locked with the entry lock function. 0.5 s, 1.5 s, 2.5 s or 5 s
      Trunk Open Mode ON Function to permit opening the luggage compartment door. ON or OFF
      Door Unlock Mode Driver Function that chooses the doors to be operated by entry unlock operation All or Driver
      Touch Activation Over Threshold Active The function that limits the consecutive entry lock operation to only 2 times can be changed between Active and Not Active. When in Not Active mode, there is no limit for the number of times that the consecutive entry lock operation can be performed. Active or Not Active

      *: Weak radio waves will still be emitted from oscillators other than the front oscillator even when the "Front" customize setting is selected.

      WARNING

      Tester Display Default Content Setting
      Key Low Battery Warning ON Function that warns the driver that the key battery is low. ON or OFF
  2. ENTRY UNLOCK MODE SWITCHING 
    NOTE: Because the key (for card type) does not have a wireless transmitter function, it cannot be used to change the entry unlock mode.
    1. Check that the power source mode is OFF and the LED on the key is not blinking. Press the lock switch and one of the other switches on the key at the same time for approximately 5 seconds while the key is in the detection area.
      • Driver door unlock default setting:

        When the switches are pressed and held for 5 seconds, the entry door unlock mode changes to the mode that is not currently selected.

      NOTE: After pressing and holding the switches for 5 seconds, wait 5 seconds before performing the same procedure again.
      • Driver door unlock mode:

        When the driver door touch sensor is touched, only the driver door unlocks. When another touch sensor is touched, all doors unlock.

      • All door unlock mode:

        When any touch sensor is touched, all doors unlock.

    2. The certification ECU (smart key ECU assembly) receives this signal from the door control receiver and changes the smart access system with push-button start to the entry unlock mode.
    3. The certification ECU (smart key ECU assembly) sounds the wireless door lock buzzer and combination meter buzzer to inform the user that the mode has been switched.
      Mode Wireless Door Lock Buzzer Combination Meter Buzzer
      Driver Door
      (Default)
      Sounds 3 times Sounds once
      All Doors
      (Customized)
      Sounds 2 times Sounds once

      HINT: 

      The procedure only changes the entry unlock mode of the smart access system with push-button start. It does not switch the unlocking of the wireless door lock control.

  3. ELECTRICAL KEY CANCEL 
    NOTE: Because the key (for card type) does not have a wireless transmitter function, it cannot be used to perform the key cancel operation.

    HINT: 

    To start the hybrid control system while the smart access system with push-button start is disabled, follow the procedure for when the key battery is low. Refer to SYSTEM DESCRIPTION .

    The electrical key cancel operation disables the following functions:

    • Entry Unlock/Lock
    • Entry Hybrid Control System Start
    • Entry Luggage Compartment Door Open
    • Electrical Key Lock-in Prevention
    • Warning
    1. The operation procedure is as follows:

      Precondition:

      Power switch off, driver door closed and unlocked.

      1. Push the unlock switch of the key once.
      2. Open the driver door within 5 seconds.
      3. Push the unlock switch of the key twice within 5 seconds.
      4. Close and open the driver door twice within 30 seconds.

        (Driver door: Close → Open → Close → Open)

      5. Push the unlock switch of the key twice within 5 seconds.
      6. Close and open the driver door within 30 seconds.

        (Driver door: Close → Open)

      7. Close the driver door within 5 seconds.

        When electrical key cancel is activated, the wireless door lock buzzer sounds twice.

        To return to the original condition, perform the procedure again. When the original condition is returned, the wireless door lock buzzer sounds once.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.