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Home >> BMW >> 1990 >> 750iL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnosis 7-Series V12 >> Component Tests >> Airflow Meter >> Check Burn-Off Function
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Check Burn-Off Function

Increase engine speed once above 2000 RPM with engine temperature greater than 140°F (60°C). After stopping the engine, a voltage increase of approximately 3.5 volts should be measured at HLM between pin No. 1 (+) and pin No. 5 (-).