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Home >> Lexus >> 2021 >> ES 250 Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System (Except Hybrid) - Diagnostics - Introduction (1 Of 2) >> METER / GAUGE SYSTEM (for Gasoline Model) >> Precaution [08/2021 - 09/2022] >> Precaution [08/2021 - 09/2022]

Precaution [08/2021 - 09/2022]

  1. PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL 
    NOTE:

    When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.

    System Name See Procedure
    Lane Tracing Assist System Refer to INITIALIZATION [08/2021 - 09/2022]
    Parking Support Brake System (for Gasoline Model)
    Parking Assist Monitor System (for Gasoline Model)
    Panoramic View Monitor System (for Gasoline Model)
    Pre-collision System
    Lighting System (EXT) (for Gasoline Model)
    Power Trunk Lid System
  2. PRECAUTION FOR REPLACING COMBINATION METER ASSEMBLY 

    When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

  3. FUEL RECEIVER GAUGE OPERATION 
    1. Operation

      The combination meter assembly receives the fuel level signal via direct line from the fuel sender gauge assembly and No. 2 fuel sender gauge assembly* and the fuel consumption signal from the ECM via CAN communication, then calculates the fuel level in the fuel tank and displays the calculated value on the fuel receiver gauge.

      1. *: for AWD
    2. Fuel Receiver Gauge Reading
      1. During normal driving:

        During driving, the value of the fuel receiver gauge is updated based on the reduction in the fuel level. The reduction is calculated by deducting the value calculated based on the fuel consumption signal sent by the ECM from the value calculated based on the signal sent by the fuel sender gauge assembly and No. 2 fuel sender gauge assembly*.

        1. *: for AWD
      2. During refueling:

        As the fuel level in the fuel tank increases during refilling, the output value of the fuel sender gauge assembly and No. 2 fuel sender gauge assembly* changes. When the combination meter assembly detects a change in the output value of the fuel sender gauge assembly and No. 2 fuel sender gauge assembly* of a certain value or more, it determines that fuel is being added and calculates the added amount. This control is called refueling judgment and the fuel receiver gauge display is updated in accordance with the fuel level calculated based on the refueling judgment.

        1. *: for AWD
    3. Refueling Judgment Conditions
      NOTE:

      Add fuel with the engine switch off to ensure safety and to enable refueling judgment so that an appropriate fuel receiver gauge reading will be obtained.

      1. Normal judgment condition (When normal refueling method is used)

        With the engine switch off, the fuel sender gauge assembly and No. 2 fuel sender gauge assembly* detects a change of 5.0 liters (5.3 US qts, 4.4 Imp. qts) or more in the fuel level.

        1. *: for AWD
      2. Other judgment conditions (When other refueling method is used)

        Any of the following conditions is met:

        • With the vehicle and engine stopped and the engine switch on (IG), the fuel sender gauge assembly and No. 2 fuel sender gauge assembly* detects a change of 5.0 liters (5.3 US qts, 4.4 Imp. qts) or more in the fuel level.
        • With the vehicle stopped, the engine switch on (IG) and the shift lever in P or N, the fuel sender gauge assembly and No. 2 fuel sender gauge assembly* detects a change of 5.0 liters (5.3 US qts, 4.4 Imp. qts) or more in the fuel level.
        • With the vehicle stopped, the engine switch on (IG) and the shift lever not in P or N, the fuel sender gauge assembly and No. 2 fuel sender gauge assembly* detects a change of 15.0 liters (15.9 US qts, 13.2 Imp. qts) or more in the fuel level.
          1. *: for AWD
    4. Precaution for Refueling
      1. The fuel sender gauge assembly and No. 2 fuel sender gauge assembly* cannot detect changes in the fuel level within certain ranges (around points E, 1/2* and F). Therefore, even if 5.0 liters (5.3 US qts, 4.4 Imp. qts) or more of fuel is added, refueling judgment may not be performed and the fuel receiver gauge reading may not change when fuel level is within such ranges.
        1. *: for AWD
      2. When refueling judgment is performed, it takes up to approximately 25 seconds for the fuel receiver gauge reading to change to the appropriate level.
    5. Forced Reset of Fuel Receiver Gauge

      When driving at a vehicle speed of 20 km/h (12 mph) or more, if the fuel level calculated using the signal from the fuel sender gauge assembly and No. 2 fuel sender gauge assembly* is different from the fuel receiver gauge reading by 15.0 liters (15.9 US qts, 13.2 Imp. qts) or more for approximately 2 minutes, the fuel sender gauge assembly reading is immediately updated based on the calculated fuel level.

      1. *: for AWD
  4. SERVICE MODE (w/ Manual (SOS) Switch) 

    When performing an inspection, repair, etc., make sure to enter service mode for the telematics system before working on the vehicle to prevent warnings and DTCs from being transmitted by the telematics system. Furthermore, make sure to cancel service mode when the inspection, repair, etc., is complete.

    Refer to PRECAUTION [08/2021 - 09/2022]

  5. SENSOR EXPRESSIONS 
    1. The descriptions for the blind spot monitor sensors differ depending on the system. The expressions listed in the table below are used in this Service Information.
      Part Name Actual Part Name
      Blind spot monitor sensor LH (A) Blind spot monitor sensor LH
      Blind spot monitor sensor RH (B) Blind spot monitor sensor RH
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