Sable V6-232 3.8L (1988)
PIP Signal Operation
OPERATION
The output signal to the Darlington amplifier is high when the window (on the armature) allows the magnetic field to reach the Hall device (switch off)
Fig. 23. When the TAB shunts the magnetic field (closes) away from the Hall device the signal is low to the Darlington amplifier (switch on).
Hall Effect Sensor
In other words when one of the windows or openings is in the gap between the Hall device and the permanent magnet, the field stays strong and the
voltage is high since the magnetic path is complete from the magnet, through the Hall device, and back to the magnet. In this case the switch is off and
the Hall Effect does not send a signal. When the TAB enters the gap, the armature cuts off the magnetic path to the Hall device and its voltage drops. In
this case the switch is on and the Hall Effect device sends a signal. The signal is switched On and Off as long as the armature is rotating (distributor is
turning) and opening and closing the magnetic path.
This is the signal used by the ECA to interpret crankshaft position and engine RPM. The signal can also be used by the TFI module if the SPOUT signal
from the ECA is lost.
