HOW DOES THE MAP WORK
Dec 16, 2012 at 5:30 PM
2005 NISSAN PRIMERA
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Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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MAP (Manifold Absolute Pressure) Sensor
The Manifold Absolute Pressure (MAP) is a sensor that is attached to the intake manifold on a car's engine and responds to changes in the vacuum and provides a reading of it.
5 volts DC is supplied to the sensor from the PCM (powertrain control module). Inside the MAP sensor there is a resistor that moves in relation to intake vacuum. The resistor varies the voltage between about 1V to 4.5V (depending on engine load) and that voltage signal is returned to the PCM to indicate vacuum. This signal is essential for the PCM to determine fuel delivery and is also used some times to determine if the EGR Valve is operating properly.
The Manifold Absolute Pressure (MAP) is a sensor that is attached to the intake manifold on a car's engine and responds to changes in the vacuum and provides a reading of it.
5 volts DC is supplied to the sensor from the PCM (powertrain control module). Inside the MAP sensor there is a resistor that moves in relation to intake vacuum. The resistor varies the voltage between about 1V to 4.5V (depending on engine load) and that voltage signal is returned to the PCM to indicate vacuum. This signal is essential for the PCM to determine fuel delivery and is also used some times to determine if the EGR Valve is operating properly.
Dec 16, 2012 at 7:33 PM
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