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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different car >> Section 324 (Meter / Gauge System (12.3 Inch) - Diagnostic Codes, Symptom Tests & Circuit Tests) >> METER / GAUGE SYSTEM (for 12.3 Inch Display) >> Speed Signal Circuit [09/2022 - 11/2022] >> Caution / Notice / Hint

Caution / Notice / Hint

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2025 Toyota GR Corolla, 2025 Toyota Corolla, 2024 Toyota GR Corolla, 2024 Toyota Corolla, and 2023 Toyota GR Corolla. However, it is still accessible from the selected car via links, so may be relevant.
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 [09/2022 - ]

    • Combination meter assembly
    • ECM
    • Certification ECU (smart key ECU assembly)
  • 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.

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - 11/2022]

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

    Refer to REGISTRATION [09/2022 - 11/2022]

    • ECM
    • Certification ECU (smart key ECU assembly)
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