Toyota Corolla (E120): Refrigerant

Inspection

On–vehicle inspection

Other materials:

Abbreviations used in this manual
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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 ...

Checking tires
Check if the treadwear indicators are showing on the tires. Also check the tires for uneven wear, such as excessive wear on one side of the tread. Check the spare tire condition and pressure if not rotated. New tread Worn tread Treadwear indicator The location of treadwear indicators is show ...