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Home >> Lexus >> 2024 >> LX 600 F Sport >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (W/ Canister Pump Module) - Diagnostics - Introduction (1 Of 2) >> SFI SYSTEM (w/ Canister Pump Module) >> Initialization [12/2021 - ] >> Initialization [12/2021 - ]
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Initialization [12/2021 - ]

  1. Inspection After Repair 

    Perform Learning Value Reset and Idle Learning after replacing or servicing parts related to engine operation. Details on procedures required are indicated by an asterisk and a number, and are explained in detail following the table.

    Part Replaced Engine Operation Learning Value Reset*1 Idle Learning*2
    • Throttle body with motor assembly (throttle with throttle position sensor body assembly)*3
    • Cleaning the deposits from the throttle body with motor assembly (throttle with throttle position sensor body assembly)*3
    		 - ◦ ◦
    Engine assembly - ◦ ◦
    • Cylinder head sub-assembly
    • Camshaft (for intake or exhaust camshaft)
    • Camshaft timing intake gear assembly
    • Camshaft timing exhaust gear assembly
    • Piston or piston ring
    • Mass air flow meter sub-assembly
    • Port fuel injector assembly
    • Direct fuel injector assembly
    • Fuel pump assembly (for low pressure side)
    • Fuel pump assembly (for high pressure side)
    • No. 2 fuel pressure sensor (for low pressure side)
    • Fuel pressure sensor (for high pressure side)
    • Air fuel ratio sensor (sensor 1)
    • Air fuel ratio sensor (sensor 2)
    • Engine coolant temperature sensor
    • Spark plug
    • Ignition coil assembly
    • Air leaks from intake system
    • Gas leaks from exhaust system
    		 Confirm the following and perform Learning Value Reset and Idle Learning when one or more of the following conditions is met:
    1. A DTC was output before component replacement.
    2. An air fuel ratio learned value (A/F Learn Value Idle Bank 1, A/F Learn Value Low Bank 1, A/F Learn Value Mid No. 1 Bank 1, A/F Learn Value Mid No. 2 Bank 1, A/F Learn Value High Bank 1, A/F Learn Value Idle Bank 2, A/F Learn Value Low Bank 2, A/F Learn Value Mid No. 1 Bank 2, A/F Learn Value Mid No. 2 Bank 2, A/F Learn Value High Bank 2, A/F Learn Value Idle (Port) Bank 1, A/F Learn Value Low (Port) Bank 1, A/F Learn Value Mid No. 1 (Port) Bank 1, A/F Learn Value Mid No. 2 (Port) Bank 1, A/F Learn Value High (Port) Bank 1, A/F Learn Value Idle (Port) Bank 2, A/F Learn Value Low (Port) Bank 2, A/F Learn Value Mid No. 1 (Port) Bank 2, A/F Learn Value Mid No. 2 (Port) Bank 2 or A/F Learn Value High (Port) Bank 2) displayed in the Data List was higher than +/- 20% before component replacement.
    3. Starting failure or rough idle occurs, or the engine stalls after component replacement.
    		 ◦ ◦
    None of the conditions in the list above are met. - -
    Turbocharger sub-assembly - ◦ -
    Knock control sensor*4 - - -
    1. ◦: Necessary.
    2. -: Unnecessary.
    NOTE:

    Engine learned values cannot be reset by disconnecting the cable from the negative (-) battery terminal or removing the EFI MAIN NO. 1 and ETCS fuses.

    1. *1: Learning Value Reset
      1. Connect the GTS to the DLC3.
      2. Turn the ignition switch to ON.
      3. Turn the GTS on.
      4. Enter the following menus: Powertrain / Engine / Utility / Learning Value Reset.
      5. Confirm the following conditions as instructed on the screen.
        1. - Ignition switch ON
        2. - Engine stopped
        3. - Battery voltage is higher than 9 V
      6. After confirming, select "Next" and initialize the learned value.

        HINT: 

        If a message indicating learned value initialization failure is displayed on the screen, confirm the execution conditions, and perform learned value initialization again.

      7. After the completion of learned value initialization, confirm the air fuel ratio learned values (A/F Learn Value Idle Bank 1, A/F Learn Value Low Bank 1, A/F Learn Value Mid No. 1 Bank 1, A/F Learn Value Mid No. 2 Bank 1, A/F Learn Value High Bank 1, A/F Learn Value Idle Bank 2, A/F Learn Value Low Bank 2, A/F Learn Value Mid No. 1 Bank 2, A/F Learn Value Mid No. 2 Bank 2, A/F Learn Value High Bank 2, A/F Learn Value Idle (Port) Bank 1, A/F Learn Value Low (Port) Bank 1, A/F Learn Value Mid No. 1 (Port) Bank 1, A/F Learn Value Mid No. 2 (Port) Bank 1, A/F Learn Value High (Port) Bank 1, A/F Learn Value Idle (Port) Bank 2, A/F Learn Value Low (Port) Bank 2, A/F Learn Value Mid No. 1 (Port) Bank 2, A/F Learn Value Mid No. 2 (Port) Bank 2 and A/F Learn Value High (Port) Bank 2) in the Data List.

        Result

        If 0 is displayed for all of the air fuel ratio learned values, initialization has completed correctly.

        If a value other than 0 is displayed for one of the air fuel ratio learned values, perform initialization again. After initialization, confirm the air fuel ratio learned values. If a value other than 0 is displayed, replace the ECM.

    2. *2: Idle Learning
      1. Turn the ignition switch off and wait for at least 30 seconds.
      2. Start the engine and warm it up with the air conditioning and all accessories off, until the engine coolant temperature is 80°C (176°F) or higher.

        HINT: 

        Learning starts when the engine coolant temperature is 80°C (176°F) or higher.

      3. After the engine is warmed up, allow it to idle for 5 minutes with the air conditioning and all accessories off.
      4. Confirm that the idle speed is within the standard range.

        Standard

        Engine Idle Speed
        600 to 800 rpm

        HINT: 

        • Be sure to perform this step with the A/C switch and all accessories off.
        • Make sure that the shift lever is in P.
    3. *3: Perform Learning Value Reset and Idle Learning after replacing the throttle body with motor assembly or cleaning deposits from the throttle body with motor assembly.

      After that, check the idle speed. If the idle speed is out of the specified range, perform the following procedure.

      WARNING:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

      HINT: 

      History information for driving and stopping is necessary to update Idle Learning.

      GTY914067Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Warm up the engine (engine coolant temperature of 80°C (176°F) or higher) with the A/C switch and all accessories off [A].
      2. Drive the vehicle at a speed of 10 km/h (6 mph) or more [B].
      3. Idle the engine for 20 seconds or more [C].
      4. Repeat procedure [B] and [C], and check that the idle speed is within the specified range [D].

        Standard

        Engine Idle Speed
        600 to 800 rpm

        HINT: 

        • Be sure to perform this step with the A/C switch and all accessories off.
        • Make sure that the shift lever is in P.
        • If the idle speed is still out of the specified range, repeat procedure [B] and [C] until the idle speed is within the specified range [E].
    4. *4: Drive the vehicle for a short while after replacing the knock control sensor, and check if knocking occurs. If knocking occurs, drive the vehicle until knocking stops.
  2. CLEAR HEAVY KNOCK HISTORY 

    HINT: 

    This function initializes the stored history data when the piston rings are replaced.

    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Enter the following menus: Powertrain / Engine / Utility / Heavy Knock History / Clear History.

      Powertrain > Engine > Utility 

      Tester Display
      Heavy Knock History
    5. Initialize the history data according to the GTS screen instructions.
  3. SWITCH SPECIFICATION INFORMATION 

    HINT: 

    • Perform Switch Specification Information after replacing the ECM.
    • Perform Switch Specification Information using Utility of the GTS.
    • Perform the Health Check using the GTS and check that no DTC is output.
    1. Connect the GTS to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the GTS on.
    4. Enter the following menus: Powertrain / Engine / Utility / Switch Specification Information.
    5. According to the prompts on the GTS screen, perform Switch Specification Information.
    6. Enter the following menus: Powertrain / Engine / Data List / Suspension Control Module Specification Information.
    7. Check that the Suspension Control Module Specification Information of the Data List displays a result other than Incomplete.
      NOTE:

      If Incomplete is displayed, perform Switch Specification Information using Utility again.

  4. CHANGE GRILLE SHUTTER CONTROL MODE AND/OR PERFORM INITIALIZATION 

    In the following situations, it is necessary to change the grille shutter control mode and/or initialize the grille shutter system.

      Change Control Mode
    (Normal Mode → Maintenance Mode)    		 Change Control Mode
    (Maintenance Mode → Normal Mode)    		 Initialize
    Before removing the radiator shutter assembly ◦ - -
    When the radiator shutter assembly has been replaced with a new one - ◦ ◦
    After installing the radiator shutter assembly - ◦ ◦
    Before troubleshooting ◦ - -
    After troubleshooting - ◦ -
    NOTE:

    In order to ensure safety, before performing troubleshooting or removing the radiator shutter assembly, change the grille shutter control mode to maintenance mode.

    HINT: 

    • When the grille shutter system is in maintenance mode, the grille shutter will not operate when operation signals are received.
    • When driving the vehicle to change the grille shutter control mode and/or perform initialization, make sure the grille shutter system is in maintenance mode. Initialization cannot be performed and the grille shutter control mode cannot be changed by driving the vehicle if the grille shutter system is in normal mode.

    WHEN USING GTS 

    1. Change the control mode to maintenance mode
      1. Connect the GTS to the DLC3.
      2. Turn the ignition switch to ON.
      3. Turn the GTS on.
      4. Enter the following menus: Powertrain / Engine / Utility / Switch Grille Shutter Control Mode.
      5. According to the display on the GTS, change the grille shutter control mode from normal mode to maintenance mode.
    2. Change the control mode to normal mode
      1. Connect the GTS to the DLC3.
      2. Turn the ignition switch to ON.
      3. Turn the GTS on.
      4. Enter the following menus: Powertrain / Engine / Utility / Switch Grille Shutter Control Mode.
      5. According to the display on the GTS, change the grille shutter control mode from maintenance mode to normal mode.
    3. Initialize
      1. Connect the GTS to the DLC3.
      2. Turn the ignition switch to ON.
      3. Turn the GTS on.
      4. Enter the following menus: Powertrain / Engine / Utility / Grille Shutter Initialization / Initialization operation (Low Torque).
      5. According to the display on the GTS, perform initialization.

    WHEN DRIVING THE VEHICLE 

    1. Change the control mode to normal mode and initialize

      HINT: 

      When changing the grille shutter control mode and/or performing initialization by driving the vehicle, the grille shutter control mode can only be changed and initialization can only be performed if the grille shutter system is in maintenance mode.

      1. Start the engine.
      2. Drive the vehicle at a speed of 5 km/h (3 mph) or more. The grille shutter control mode will be changed and initialization (low torque) will be performed automatically when the vehicle speed exceeds 5 km/h (3 mph).
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