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:
If a warning message is displayed
The multi-information display
shows warnings for
system malfunctions and
incorrectly performed operations,
and messages that
indicate a need for maintenance.
When a message is
displayed, perform the
appropriate corrective
action for the message.
If a warning message is displayed
again after the
ap ...
Exterior/interior trim
Preparation
Recomended tools
Equipment
Vehicle control system
Preparation
Recomended tools
...
Replacement
Hint:
for parking brake cable assy no.2, Perform the same procedure to the parking
brake cable assy no.3.
1. Remove rear wheel
2. Remove rear brake drum sub–assy
3. Remove rear brake automatic adjust lever lh
4. Remove front brake shoe
sst 09718–00010
5. Remove parking brake sho ...