1. Within 0.1 s after the ignition is turned on, the pressure in the intake manifold is less than 118 mbar.
2. At crankshaft speed below 1980 min⁻¹ the pressure in the intake manifold is less than 118 mbar.
3. When the accelerator pedal is released, the pressure in the intake manifold is not less than 986 mbar, and the crankshaft speed is not less than 2400 min⁻¹ (as if the car was moving downhill).
Examination
Fig. 2.239. Absolute pressure sensor connector
Check the voltage at terminals 1 and 4 of the absolute pressure sensor electrical connector (Fig. 2.239).
Pin 4: absolute pressure sensor ground.
Pin 1: Absolute pressure sensor output.
If the voltage deviates from the norm, replace the absolute pressure sensor.