Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Cruise control system / Open vehicle speed sensor circuit/ Vehicle speed signal abnormal

Toyota Corolla (E120): Open vehicle speed sensor circuit/ Vehicle speed signal abnormal

Dtc 21 open vehicle speed sensor circuit

Dtc 23 vehicle speed signal abnormal

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Inspection procedure
1 Inspect terminal voltage(idl) Remove the cruise control ecu assy with connector still connected.  disconnect the ecm connector.  turn the ignition switch to on.  measure voltage between terminal 13 (idl) of cruise control ecu assy connector and body ground when the ...

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 ...

Battery
Check the battery as follows. ■ Battery exterior Make sure that the battery terminals are not corroded and that there are no loose connections, cracks, or loose clamps. Terminals Hold-down clamp ■Before recharging When recharging, the battery produces hydrogen gas which is flammable and exp ...