Sidekick JX 2D 4WD L4-1.6L (1998)
Manifold Pressure/Vacuum Sensor: Description and Operation
This sensor senses pressure change in the intake manifold and converts it into voltage change. It consists of a semiconductor type pressure
converting element which converts a pressure change into an electrical change and an electronic circuit which amplifies and corrects the electric
change.
The ECM sends a 5-volt reference voltage to the pressure sensor. As the manifold pressure changes, the electrical resistance of the sensor also
changes.
By monitoring the sensor output voltage, ECM knows the manifold pressure change when EGR valve is operated and judges the EGR flow to be
faulty when this pressure change is excessively large or small.