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.
| 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 |