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Title: Altitude sensor Post by: Bi-turbo on June 04, 2014, 01:53:21 AM S4 B5 with 551C
Fitted new MAP sensor OEM Still getting low atmosphirc reading 650mbar at idel when it should be as close to 1000mbar as possible Is there a senor on the ecu bord itself that mesures the altitude? If so were is it? im at work and have a 551C open at home so i can look later Thanks Title: Re: Altitude sensor Post by: nyet on June 04, 2014, 12:33:11 PM Is there a senor on the ecu bord itself that mesures the altitude? If so were is it? im at work and have a 551C open at home so i can look later Yes, there is. I don't have a P/N handy but i will look it up time permitting. Title: Re: Altitude sensor Post by: ddillenger on June 04, 2014, 04:22:18 PM It is very distinctive. it is white, and square. Only thing on the top of the board that is white and square-lol
Title: Re: Altitude sensor Post by: Bi-turbo on June 07, 2014, 08:41:53 AM Think i've found it, it has two holes in it one on a corner and the other in the opposite corner
I'm getting 650mbar from the atmospheric reading with vcds and 1000mbar from the new Map sensor and a -35% altitude correction. Does that mean that the ecu is taking the 1000mbar reading from the Map sensor and seeing the 650mbar from the atmospheric sensor and correcting it by 35% to bring it inline? Title: Re: Altitude sensor Post by: tjwasiak on June 07, 2014, 01:00:57 PM Your ECU just sees constantly 0,35 bar of boost ATM.
Title: Re: Altitude sensor Post by: Bi-turbo on June 09, 2014, 12:42:03 PM No that makes no sense
It boosts fine and drives fine as the Map sensor reads correctly. The -35% is an altitude correction factor which means its taking the map sensor's reading and correcting the atmospheric sensor's reading Altitude sensor reads 650mbar 35% of 1000mbar = 350mbar + 650mbar =1000mbar so the -35% is the ecu correcting the altitude sensor because it using the Map sensor's reading as correct Title: Re: Altitude sensor Post by: Bi-turbo on July 02, 2014, 08:21:53 AM The number on what i belive to be the altitude sensor is
961 A83941B 022 Can anyone confirm this? Title: Re: Altitude sensor Post by: Jesper Rs4 on August 24, 2014, 08:33:14 AM Where Can i read the altitude sensor values? I use vcds.
Title: Re: Altitude sensor Post by: nyet on August 24, 2014, 08:43:54 AM http://s4wiki.com/wiki/VCDS
block 113 But you should be using ME7L. Title: Re: Altitude sensor Post by: Jesper Rs4 on August 24, 2014, 09:06:40 AM Sorry, i mean the sensor inside ecu
Title: Re: Altitude sensor Post by: Bi-turbo on August 24, 2014, 01:14:51 PM The altitude sensor that is on bord itself is read on VCDS genuine copy
Should read 1000mbar or as close to. Title: Re: Altitude sensor Post by: gremlin on August 25, 2014, 04:08:43 AM The altitude sensor that is on bord itself is read on VCDS genuine copy Here is datasheet for this sensor Title: Re: Altitude sensor Post by: Bi-turbo on August 26, 2014, 01:52:57 AM Nice, were did you get that from
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