Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Ecm power source circuit / Circuit description
Toyota Corolla (E120): 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 supplying power to terminal +b of the ecm.
If the ignition switch is turned off, the ecm continues to switch on the efi relay for a maximum of 2 seconds for the initial setting of the isc valve.
Wiring diagram
Other materials:
Overhaul
1. Remove bench type rear seat cushion assy
Disengage the 2 clamps, and then remove the seat cushion.
2. Remove bench type rear seat back assy
remove the headrests.
remove the 2 bolts and seat back.
3. Remove bench type rear seat cushion
cover
remove the ho ...
Power outlet
The power outlet can be used
for 12 V accessories that run on
less than 10 A.
Lift the lid while pulling up the
knob and open the power outlet
lid.
■The power outlet can be used
when
The engine switch is in ACC or ON.
■When turning the engine switch
off
Disconnect electrical devices with
charg ...
Engine hood/door
Preparation
Sst
Recomended tools
Equipment
...