Based on information
from various sensors, the PCM measures the fuel injection amount. The fuel
injector is a solenoid-operated valve and the fuel injection amount is
controlled by length of time that the fuel injector is held open. The PCM
controls each injector by grounding the control circuit. When the PCM
energizes the injector by grounding the control circuit, the circuit
voltage should be low (theoretically 0V) and the fuel is injected. When
the PCM de-energizes the injector by opening control circuit, the fuel
injector is closed and circuit voltage should be peak for a
moment.
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If an injector connector is disconnected for
more than 46 seconds while the engine runs, the PCM will determine
that the cylinder is misfiring and cut fuel supply. So be careful
not to exceed 46 seconds. But the engine runs normally in 10 seconds
after turning the ignition key off. |
