Toyota Corolla (E120): Electronically controlled transmission communication circuit

Inspection procedure

Circuit description

Other materials:

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 ...

Overhaul
1. Remove oil filler cap sub–assy Remove the oil filler cap from the cylinder head cover. 2. Remove oil filler cap gasket Using a screwdriver, remove the gasket from the oil filler cap. 3. Remove ventilation valve sub–assy Remove the ventilation valve from the cyl ...

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 ...