Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Throttle/pedal position
sensor/switch ”a” circuit
Toyota Corolla (E120): Throttle/pedal position sensor/switch ”a” circuit
Dtc p0120 throttle/pedal position sensor/switch ”a” circuit
Dtc p0122 throttle/pedal position sensor/switch ”a” circuit low input
Dtc p0123 throttle/pedal position sensor/switch ”a” circuit high input
Hint
: this is the purpose for the ”throttle position sensor”.
Other materials:
Circuit description
When the ignition switch is turned on, battery positive voltage is applied to
the coilwhich closes the contacts
of the efi main relay (marked: efi) and supplies power to terminal +b of the ecm.
This signal causes current to flow to the coil, closing the contacts of the efi
relay and supplyin ...
Components
...
Monitor description
The battery supplies electricity to the ecm even when the ignition switch is
off. This electricity allows the
ecm store data such as dtc history, freeze frame data, fuel trim values, and
other data. If the battery voltage
falls below a minimum level, the ecm will conclude that there is a fault ...