Fuel Pump Control
The ECM controls the operation of the fuel pump through the fuel pump control unit, based on signals from the crankshaft position sensor. To improve safety, a "fuel pump stop signal" is sent from the ECM to the fuel pump control unit to stop the fuel pump if the engine stalls while the ignition switch is ON.
FUEL PUMP CONTROL
| Ignition switch ON | Fuel pump relay | Fuel pump |
|---|---|---|
| A certain period of time after ignition switch is turned ON | ON | Operates |
| While cranking the engine | ON | Operates |
| While engine is operating | ON | Operates |
| When engine stops | OFF | Does not operate |