Manifold air pressure: Difference between revisions

From S4wiki
Jump to navigation Jump to search
No edit summary
Line 14: Line 14:
At atmospheric pressure (14.7 psi or 1.01 bar at sea-level), the
At atmospheric pressure (14.7 psi or 1.01 bar at sea-level), the
voltage is approx. 2.5 volts.
voltage is approx. 2.5 volts.
The signal is used for charge pressure control.


The maximum pressure is approximately 22.45 psi (1.55 bar)
The maximum pressure reading is approximately 22.45 psi (1.55 bar)

The signal is used for charge pressure control.


The Motronic also needs information on
The Motronic also needs information on
Line 27: Line 28:
speed-dependent). This will result in a
speed-dependent). This will result in a
deficiency of engine power.
deficiency of engine power.



==References==
==References==

Revision as of 22:00, 11 November 2006

Charge pressure sender G31

Charge pressure sender G31.png

The charge pressure sender is located upstream of the throttle valve control part.

The Motronic supplies the sender with a voltage of 5 volts and earth. The signal which the sender generates is a pressure-proportional voltage ranging from 0 to 5 volts.

At atmospheric pressure (14.7 psi or 1.01 bar at sea-level), the voltage is approx. 2.5 volts.

The maximum pressure reading is approximately 22.45 psi (1.55 bar)

The signal is used for charge pressure control.

The Motronic also needs information on charge pressure so that it can take countermeasures if the maximum permissible pressure is exceeded.

Substitute function and self-diagnosis

If sender G31 fails, the charge pressure is controlled via the characteristic curve (engine speed-dependent). This will result in a deficiency of engine power.

References