FUEL PUMP CONTROL OPERATION[L3 Turbo]

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Operation Condition

•  When the ignition switch is turned to the ON position, the PCM turns the fuel pump relay on for 1 s, then off.
•  When it is detected that the crankshaft position signal rises during cranking, the fuel pump relay turns on.
•  When the engine is stopped, the fuel pump relay turns off.

Operation Inhibition Condition

•  When receiving an engine stop request signal from the immobilizer system, the PCM force-stops control of the fuel injectors. As a result, the engine does not start.
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1
Engine stop request signal not received
2
Engine stop request signal received
3
From main relay
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From battery
5
Fuel pump relay
6
Fuel pump