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Home >> Lexus >> 2025 >> NX 250 FWD >> Repair and Diagnosis >> Electrical >> Gauges >> Meter / Gauge System - Diagnostic Codes (2 Of 2), Symptom Tests & Circuit Tests >> Meter / Gauge System >> Speed Signal Circuit [11/2021 - 03/2024] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • 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.
  • When replacing any of the following ECUs, update the ECU security key.

    Refer to UPDATE ECU SECURITY KEY [11/2021 - ]

    • Combination meter assembly
    • ECM*
    • Certification ECU (smart key ECU assembly)
      1. *: for Gasoline Model
  • When the electronically controlled brake system is malfunctioning, a correct vehicle speed signal may not be received. Before preforming this procedure, confirm that the electronically controlled brake system is not malfunctioning.

    for HEV Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

    for Gasoline Model: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]

  • Before replacing any of the following ECUs, refer to Registration.

    for HEV Model: Refer to REGISTRATION [11/2021 - 03/2023] , or refer to REGISTRATION [03/2023 - ]

    for Gasoline Model: Refer to REGISTRATION [11/2021 - ]

    • ECM*
    • Certification ECU (smart key ECU assembly)
      1. *: for Gasoline Model