Toyota Avalon Service & Repair Manual: Precaution




  • Before replacing the ECM, refer to Registration.

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  • Perform Registration (VIN registration) after replacing the ECM.

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  • Perform Learning Value Reset and Idle Learning after replacing or servicing parts related to engine operation.

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  • Make sure to perform Reset Memory (A/T initialization), when replacing the automatic transaxle assembly, ECM or engine assembly.

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  • When the cable is disconnected from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected.

    System Name

    See Procedure

    Lane Departure Alert System (w/ Steering Control)

    Intelligent Clearance Sonar System

    Parking Assist Monitor System

    Panoramic View Monitor System

    Pre-collision System

    Lighting System (for Gasoline Model with Cornering Light)



Observe the following items for safety reasons:

  • Before using the Techstream, read the instruction manual.
  • Prevent the Techstream cable from being caught on the pedals, shift lever or steering wheel when driving with the Techstream connected to the vehicle.
  • When driving the vehicle for testing purposes using the Techstream, 2 persons are required. One drives the vehicle, and the other operates the Techstream.
    Parts Location

    Problem Symptoms Table

    See More:

    Toyota Avalon Service & Repair Manual > Pre-collision System(for Hv Model): Brake Control Signal Mismatch (C1A64)
    DESCRIPTION The skid control ECU (brake booster with master cylinder assembly) sends signals to the driving support ECU assembly according to the brake control status. If the driving support ECU assembly receives an electronically controlled brake system malfunction signal from the skid control ECU ...

    Toyota Avalon Owners Manual

    Toyota Avalon Service & Repair Manual

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