Toyota Corolla (E120): Short in d squib circuit

Problem symptoms table

Circuit description

Other materials:

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 ...

Fail–safe chart
If any of the following codes is recorded, the ecm enters the fail–safe mode. Check for intermittent problems Hand–held tester only: by putting the vehicle’s ecm in the check mode, the 1 trip detection logic is possible instead of the 2 trip detection logic, and the sensitivity to de ...

Other functions
■  Switching between outside air and recirculated air modes Press . The mode switches between outside air mode (indicator off) and recirculated air mode (indicator on) each time is pressed. ■ Defogging the windshield Defoggers are used to defog the windshield and front side w ...