Toyota Corolla (E120): Problem symptoms table

Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in the order shown. If necessary, repair or replace these parts.

On–vehicle inspection

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    On–vehicle inspection
    1. Horn button assy (vehicles not involved in collision) Check the diagnostic system . visually check the following item with the horn button assy (with airbag) installed in the vehicle. Check cuts, minute cracks or marked discoloration on the horn button assy top surface and in the ...

    Body panel undercoating areas
    Apply pastar uwe or pastar uc to the chassis, floor underside, sheet metal fitting weld points of the body, and inside of the wheel house to prevent rust and noise, as well as protect the body from flying rocks. Hint:  work must be performed while wearing the appropriate protective ...

    Symptom confirmation and diagnostic trouble code
    Hint: the diagnostic system in corolla has various functions. The first function is the diagnostic trouble code (dtc) check, in which a malfunction in the signal circuits to the ecu is stored in code form in the ecu memory. Another function is the input signal check, which checks if ...