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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    Purpose of the readiness tests
    The on–board diagnostic (obd ii) system is designed to monitor the performance of emission–related components and report any detected abnormalities in the form of diagnostic trouble codes (dtcs). Since the various components need to be monitored during different driving condition ...

    Adjustment
    1. Check and adjust brake pedal height Inspect brake pedal height. Pedal height from asphalt sheet: m/t: 134.9 – 144.9 Mm (5.311 – 5.703 In.) A/t: 136.0 – 146.0 Mm (5.353 – 5.747 In.)  Disconnect the connector from the stop lamp switch.  Remove the stop lamp ...

    Circuit description
    The ecm compares the two waveforms of the heated oxygen sensors located before and after the catalyst to determine whether or not the catalyst performance has deteriorated. Air–fuel ratio feedback compensation keeps the waveform of the heated oxygen sensor in front of the catalyst alterna ...