Signal Name: MAP/ Fuel injectors
Volt/division/range: A 2V B 20V
Time/division/range: 2ms
Draw the pattern below:
Explain the operation of the sensor or Actuators using the Graph:
(Use arrow at different point, and describe what happens there)
Arrow B = Source or zero voltage, No current going through to this point.
Arrow A = The voltage drop abruptly, when the PCM driver turn ON, this complicating the circuit.
Arrow D = The voltage drop is the voltage that is rimming in the circuit to push the current across, the resistance of the PCM driver or got and also period of the injector is opened.
Arrow E = This is the current flow through winding to create or build up of magnetic field, which is inductance and collapsed of this magnetic field which from this slight of peak.
Arrow C = back to MF.
These wave form are of fuel injector.
MAP wave form are:
Arrow 1= When the engine is start, the throttle is wide open, zero vacuum, will be reduced.
Arrow 2 = The voltage approaching nearly 5V, as a vacuum is applied the voltage will reduced.
The example wave form clearly demonstrate that at idle voltage of 1v and the throttle is opened the vacuum in the manifold drop and the higher voltage for these condition is seen. That has on the wave form is due to the vacuum change form the indicate pulses as the engine is urning.
the oscilloscope pattern is NOT of a map, it looks like fuel injector and cam/crank sensor, do you know the difference?
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