Hall Switch/Sensor Testing - UNI-T UT106 Operating Manual

Model UT106: OPERATING MANUAL
Warning
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 to the 200 k . As prompted at
the LCD connect terminal, insert the red test lead
into the terminal and the black one into 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
the lead, the reading should remain unchanged.
3. Hall Switch/Sensor Testing (see figure 15)
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.
Black
Iron Plate
Ground
Signal Terminal Hall Sensor
Red
(figure 15)
39
to 50 k . In bending
Chrysler Motor Fuel Dispenser
Hall Switch
Jumper Signal
Terminal
Ground
Ford Motor Fuel Dispenser
Hall Switch
Magnetic
Pole
Signal
Ground
Terminal