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Ok, John
Here is a bit more information. The two coils you
will see inside the crank angle sensor distrubutor box produce the "G"
signal (that's the coil aligned with the top two spoke rotor - its on the right
side of the case with a red dot on the small black coil - at least in
mine). The coil on the left is the "Ne" coil and is aligned with the 24
tooth rotor. In any case, it appears from this diagram that they are
independent. AND if there are four wires coming out of the case then two
should go to the G coil and two to the Ne coil. That means if you
put a ohm meter (continunity checker) on one of the four wires - the there
should/must be a second wire which is the other end of that coil which should
give you a response. In other words if you don't get a response of
continunity when you touch the other three wires then at least one coil is
open (broken wire in coil or broken lead to that coil).
So Pick a wire from the crankangle sensor and put
one probe of the voltohm meter (set for measuring low resistance or a
continuity mode)on that wire. Check the other three wires with the other
end. If you get a response then that coil at least has continuity(its
possible you could get good continuity and the coil could be shorted - but that
is not too likely). Once you get two wires that respond note those and
then move your probe to one of the two remaining wires. Check those two
wires for continuity. If the indicate good then its likely the crankangle
sensor coils are OK. Then check continuity back from the crankangle sensor
to your Ec2 to make certain they are good. Oh, I am assuming you can
unplug your crankangle sensor (makes it easier to do), but if your crankangle
sensor is does not have a disconnect electrical plug you can do the same thing
from the ends of you cable where they go into the Ec2 (I think, I have not
checked the Ec2 wiring diagram - its possible that two of the ends from each
coil go to a common ground so that you only have three connections. Let me
know if that's the case.
Hope this helps some
Ed A
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If you were to remove the inspection plate or cover of the crank
angle sensor, you would see two teeth at the very top and 24 teeth just
below the top two. The two-tooth reluctor provides the G signal, which is
rotor position information. The 24-tooth trailing coil firing reluctor
provides the Ne signal, which is rpm information and trailing-coil firing
synch. Like a conventional distributor, the crank angle sensor turns at
half crank speed. One crank angle sensor degree is equal to two crankshaft
degrees, since the crank turns twice as fast.
Known good G and Ne signals are shown in Figure 6. Channel 1 is Ne. Ne
frequency is approximately 12 times as fast as G. This should make sense,
since G produces two signals to Ne's 24 signals per crank angle sensor
revolution. These signals were captured at approximately 1,360
rpm. |
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