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Old 09-27-2022, 12:57 PM   #28
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Join Date: Jul 2016
Location: MA/NH

I looked at a handful of lh2.4 bins in regards to this and it turns out they only do this maf logic I described on 5xx ecus. The maf logic on the 9xx ecus is simply airflow_result = maf_linearization_map[ 0xC3 ] .

The 9xx bins do still use this 0xC9 value from the hybrid pin 1 to ADC pin an6 as some sort of boolean logic (true if > 2.5volt / false if < 2.5volt) in a couple places around the code but doesn't look like anything major. Notably something to do with cold start cranking and load transient logic.
1991 244 LH3.1 M46 402k miles
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