Tracker 4WD L4-1.6L VIN 6 (1998)
Manifold Absolute Pressure (MAP) Sensor: Description and Operation
Manifold Absolute Pressure (MAP) Sensor
Manifold Absolute Pressure (MAP) Sensor
The MAP sensor (1) measures the change in the intake manifold pressure (vacuum) (2). The powertrain control module (PCM) applies 5 volts to the
MAP sensor. The MAP sensor consists of a semi-conductor type pressure sensing element (3). The pressure sensing element converts a change in
pressure into an electrical signal. The MAP sensor also contains electronic circuitry that amplifies and corrects the electrical signal. The PCM
monitors the change in manifold pressure that results from the changes in RPM and engine load. A low MAP sensor voltage reading at the PCM
indicates low manifold pressure. A high MAP sensor voltage reading at the PCM indicates high manifold pressure.
