Toyota Corolla (E120): Circuit description

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Hint

: there is a case that hand–held tester cannot be used when ecu is abnormal.

Wiring diagram

Inspection procedure

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    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 ...

    Location of the storage features
    Bottle holders/door pockets Open trays (if equipped) Glove box Cup holders (if equipped) Console box WARNING ■Items that should not be left in the storage spaces Do not leave glasses, spray cans in the storage spaces, as this may cause the following when cabin temperature becomes high: ...

    Shift position uses
    *: Shifting to the D position allows the system to select a gear suitable for driving conditions. Setting the shift lever to the D position is recommended for normal driving. ■Downshifting restrictions The shift lever cannot be downshifted if the following speeds are exceeded. mph (km ...