Bi-turbo
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« on: June 04, 2014, 01:53:21 AM »
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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
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nyet
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« Reply #1 on: June 04, 2014, 12:33:11 PM »
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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. |
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ddillenger
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« Reply #2 on: June 04, 2014, 04:22:18 PM »
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It is very distinctive. it is white, and square. Only thing on the top of the board that is white and square-lol
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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Bi-turbo
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« Reply #3 on: June 07, 2014, 08:41:53 AM »
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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?
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tjwasiak
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« Reply #4 on: June 07, 2014, 01:00:57 PM »
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Your ECU just sees constantly 0,35 bar of boost ATM.
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Bi-turbo
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« Reply #5 on: June 09, 2014, 12:42:03 PM »
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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
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Bi-turbo
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« Reply #6 on: July 02, 2014, 08:21:53 AM »
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The number on what i belive to be the altitude sensor is
961
A83941B
022
Can anyone confirm this?
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Jesper Rs4
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« Reply #7 on: August 24, 2014, 08:33:14 AM »
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Where Can i read the altitude sensor values? I use vcds.
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Jesper Rs4
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« Reply #9 on: August 24, 2014, 09:06:40 AM »
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Sorry, i mean the sensor inside ecu
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Bi-turbo
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« Reply #10 on: August 24, 2014, 01:14:51 PM »
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The altitude sensor that is on bord itself is read on VCDS genuine copy
Should read 1000mbar or as close to.
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gremlin
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« Reply #11 on: August 25, 2014, 04:08:43 AM »
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The altitude sensor that is on bord itself is read on VCDS genuine copy
Here is datasheet for this sensor |
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Bi-turbo
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« Reply #12 on: August 26, 2014, 01:52:57 AM »
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Nice, were did you get that from
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