Application:
– MAP (Manifold Absolute Pressure) sensor
– boost pressure sensor
– atmospheric pressure sensor
– fuel pressure sensor
– fuel tank pressure sensor
– oil pressure sensor.

Typical location of the manifold absolute pressure sensor.

Connection of the USB Autoscope IV to the sensor signal wire.

Setting the USB Autoscope IV to the manifold absolute pressure sensor testing mode.

Output voltage waveform of the manifold absolute pressure sensor in good condition on Mitsubishi Lancer 1.6 2005, recorded during engine start, transitioning to idle.

Output voltage waveform of the manifold absolute pressure sensor in good condition on a FORD Scorpio 2.0i 1990, recorded with the ignition on and the engine off.

Output voltage waveform from a properly functioning MAP sensor (Mitsubishi Lancer 1.6 2005). The output voltage of the sensor decreases with increasing vacuum in the intake manifold.
A – engine start;
B – running at idle;
C – snap throttle (acceleration);
D – deceleration;
E – running at idle;
F – engine shut off.

Snap throttle and deceleration

Engine running at idle.

Output voltage waveform from a properly functioning MAP sensor with frequency output. KOEO (Key On Engine Off). (FORD Scorpio 2.0i 1990).

Engine running at idle.

Output voltage waveform from a properly functioning boost pressure sensor during a snap throttle.
(VW Passat 1.8TSI 2008).