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mysocal911 mysocal911 is online now
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Join Date: Feb 2014
Location: Lomita, CA
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Actual voltage measurements from key inputs pins of various Porsche 911 Lambda ECUs:

0 280 800 055
2 - .53, O2 input
6 - 12, no Lambda effect (NLE)
7 - 12, enriches at ground (EAG)
9 - 5, NLE
11 - 12, EAG
12 - 12, EAG

0 280 800 006
2 - .53, O2 input
6 - 12, NLE
7 - 12, EAG
9 - 5, NLE
12 - 12, EAG

0 280 800 037
2 - .53 O2 input
6 - 12, NLE
7 - 12, EAG
9 - 5, NLE
11 - 12, EAG
12 - 12, EAG

So for the Lambda ECU (055) in this thread with no O2 sensor and pins 7/11/12 open, a 50% DC should result. It's that simple!
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Dave
Old 06-08-2020, 09:38 AM
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