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Why is my IAT sensor reading crazy values?

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Old Jun 4, 2009 | 08:00 PM
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ismael_pt
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Default Why is my IAT sensor reading crazy values?
GM open element, using stock car wires, shared between the two ecus.

In a 20-25ēC ambient temp, the ADC value thrown by the sensor is something like 3500+ ADC, and does not match with a "normal" calibration.
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Old Jun 4, 2009 | 08:17 PM
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Has to be a connection problem... Maybe ground loop interference? Which ecu is supplying the current to the sensor, and which is supplying the ground?
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Old Jun 13, 2009 | 02:01 AM
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Resolved. I was sharing the GM IAT sensor between the two ecus. Switching it only for the adaptronic and the problem goes away.
Last edited by ismael_pt; Jun 15, 2009 at 06:42 AM.
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