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Home >> BMW >> 1992 >> 850i Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Self Diagnostics >> Component Tests >> Check Engine Light >> Simulated Defect
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Simulated Defect

For example, detach connector from air mass meter and start engine. CHECK ENGINE light must then light when the defect code 41 air mass meter is detected by the control unit. Check to see if control unit output is a ground signal. Ensure wires at CHECK ENGINE light are okay.

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