conflicting information on location of Altitude/barometric pressure sensor..
10-15-2007, 11:36 PM
#1
AudiWorld Super User
Thread Starter
conflicting information on location of Altitude/barometric pressure sensor..
one says
1) Soldered onto ecu
2) Inside the ecu housing.. i.e. that big black box under the plenum cover
3)outside the ecu housing..
so which is it? I presume it's going to change depending on MY.. i = 2001.5 AWM
1) Soldered onto ecu
2) Inside the ecu housing.. i.e. that big black box under the plenum cover
3)outside the ecu housing..
so which is it? I presume it's going to change depending on MY.. i = 2001.5 AWM
10-16-2007, 03:49 AM
#3
as proof i offer the S4 SSP, page32:"altitude sensor F96 is integrated into the engine control unit"
<ul><li><a href="http://www.modifieda4.com/web/archive/SSP%20198%20-%20Audi%20S4%20Engine%20(english).pdf">right click save as</a></li></ul>
10-16-2007, 03:52 AM
#4
more on page 49
<i>The altitude sender F96 ....
... is integrated in the engine control unit, as is
normally the case with turbocharged engines.
... is required to control the charge pressure. In
conditions of decreasing air pressure (lower
density), the charge pressure is reduced to
prevent the turbocharger overspeeding.
... influences the air/fuel mixture composition
at engine start-up. The starting mixture is
leaned down with rising altitude.
Substitute function and self-diagnosis
If a signal fails, the charge pressure is reduced
to a safe level, which results in a deficiency of
engine power.
Adaption of the injection quantity at start-up
no longer takes place.
The fault message "Control unit defective" is
displayed in the self-diagnosis.</i>
... is integrated in the engine control unit, as is
normally the case with turbocharged engines.
... is required to control the charge pressure. In
conditions of decreasing air pressure (lower
density), the charge pressure is reduced to
prevent the turbocharger overspeeding.
... influences the air/fuel mixture composition
at engine start-up. The starting mixture is
leaned down with rising altitude.
Substitute function and self-diagnosis
If a signal fails, the charge pressure is reduced
to a safe level, which results in a deficiency of
engine power.
Adaption of the injection quantity at start-up
no longer takes place.
The fault message "Control unit defective" is
displayed in the self-diagnosis.</i>
10-16-2007, 04:35 AM
#5
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You should contact someone in Colo. w/a good shop. Most baro problems were researched there and Audi
does some hi-alt testing there. They will be very familiar with what you want. Having said that, I have never seen a problem with that sensor in the lowlands.
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