Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Fuel pump control circuit / Circuit description
Toyota Corolla (E120): Circuit description
In the diagram below, when the engine is cranked, current flows from terminal st2 of the ignition switch to the starter relay coil and also current flows to terminal sta of the ecm (sta signal).
When the sta signal and ne signal are input to the ecm, tr is turned on, current flows to the coil of the circuit opening relay, the relay switches on, power is supplied to the fuel pump and the fuel pump operates.
While the ne signal is generated (engine running), the ecm keeps tr on (circuit opening relay on) and the fuel pump also keeps operating.
Wiring diagram
Other materials:
Overhaul
Hint:
overhaul the rh side by the same procedure as the lh side.
1. Remove front wheel
2. Drain brake fluid
Notice:
wash the brake fluid off immediately if it comes into contact with any painted
surface.
3. Remove front disc brake cylinder sub–assy
Remove the union bolt and gasket ...
Power outlet
Please use as a power supply for electronic goods that use less than 12 VDC/10
A (power consumption of 120 W).
Open the lid.
■The power outlet can be used when
► Vehicles without a smart key system
The engine switch is in the “ACC” or “ON” position.
► Vehicles with ...
Inspection procedure
1 Inspect fuse(ecu–ig fuse)
Remove ecu–ig fuse from the instrument panel j/b.
check continuity of ecu–ig fuse.
Ok:
continuity
2 Inspect battery
Ok:
voltage: 10 – 14 v
3 Inspect skid control ecu connector(ig1 terminal voltage)
In case of using hand–held te ...