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Home >> Lexus >> 2023 >> LX 600 Luxury >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (W/O Canister Pump Module) - Diagnostics - Introduction (1 Of 2) >> SFI SYSTEM (w/o Canister Pump Module) >> Check Mode Procedure [12/2021 - ] >> Check Mode Procedure [12/2021 - ]
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Check Mode Procedure [12/2021 - ]

NOTE:

All of the stored DTCs and Freeze Frame Data are cleared if: 1) the ECM is changed from normal mode to check mode or vice versa; or 2) the ignition switch is turned from ON to ACC or off while in check mode. Before changing modes, always check for and note any DTCs and Freeze Frame Data.

HINT: 

Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect malfunctions that cannot be detected in normal mode.

  1. CHECK MODE PROCEDURE 
    1. Check and ensure the following conditions:
      1. Battery voltage is 11 V or higher.
      2. Accelerator pedal is fully released.
      3. Shift lever is in P.
      4. A/C switch is off.
    2. Turn the ignition switch off.
    3. Connect the GTS to the DLC3.
    4. Turn the ignition switch to ON.
    5. Turn the GTS on.
    6. Enter the following menus: Powertrain / Engine / Utility / Check Mode.

      Powertrain > Engine > Utility 

      Tester Display
      Check Mode
    7. Change the ECM from normal mode to check mode.
    8. Check that the MIL flashes as shown in the illustration.
      GTY758299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Start the engine.
    10. Check that the MIL turns off.
    11. Simulate the conditions of the malfunction described by the customer.
    12. Check for DTCs and Freeze Frame Data using the GTS.
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