Hall Switch/Sensor Testing - UNI-T UT105 Operating Manual

Model UT105: OPERATING MANUAL
Measurement Operation(20)
Warning:
l Some of Chrysler's products use a spark plug
high voltage damper with "positive lock" end
electrodes, which can only be moved out of the
distributor board. If it is moved out of anywhere
else, some damage will result. Refer to various
kinds of automotive manuals for the details.
(2) Set the rotary switch of the meter to the 200 k . As
prompted at the LCD connect terminal, insert the red
test lead into the
the COM terminal.
(3) Connect the red and black test lead probes in parallel
to the two ends of the high-voltage damper and observe
the reading. The normal resistance is generally in a
range of 3 k to 50 k . In bending the lead, the reading
should remain unchanged.
3.Hall Switch/Sensor Testing (see figure 12)
When the tach and dwell are tested in the computer of
the automobile, a Hall sensor is used. The Hall sensor
is normally used in the ignition system to detect the position
of the camshaft so that the computer of the automobile
can set the optimal time for the ignition and the opening
of the fuel injector.
terminal and the black one into
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