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Home >> Land Rover >> 2015 >> Range Rover Autobiography >> Repair and Diagnosis >> External Pages >> Different car >> Section 10 (Electronic Engine Controls - TDV6 3.0L Diesel -- Range Rover/L405) >> Electronic Engine Controls - TDV6 3.0L Diesel >> Electronic Engine Controls (Description And Operation) >> Description And Operation >> Description >> Manifold Absolute Pressure Sensor

Manifold Absolute Pressure Sensor

WARNING: This page is about a different car, the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, and 2016 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.
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The Manifold Absolute Pressure (MAP) sensor is installed in the outlet of the electric throttle, to measure the pressure of the air entering the intake manifolds. The sensor is a semi-conductor type sensor which responds to pressure acting on a membrane within the sensor, altering the output voltage.

The sensor receives a 5 V reference voltage and a ground from the Powertrain Control Module (PCM) and returns a signal of between 0.5 - 4.5 V to the PCM. A Low Pressure (LP) returns a low voltage signal to the PCM and a High Pressure (HP) returns a high voltage. The signal is used in conjunction with the Mass Air Flow and Temperature (MAFT) sensor signals to calculate the injection period.

For additional information, refer to: INTAKE AIR DISTRIBUTION AND FILTERING

The PCM monitors the engine MAP sensor for faults and can store fault related codes. These can be retrieved using Land Rover approved diagnostic equipment. If the sensor fails, the PCM uses the MAFT sensor signal as a substitute.

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