alexjohn Posted December 18, 2018 Report Share Posted December 18, 2018 My map sensor 3 bar have problem for calibration.the wire is correct already but cant calibration? Need help Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 18, 2018 Report Share Posted December 18, 2018 Your pic above shows there is only 0.55V coming from the MAP sensor. The GM 3 Bar sensor should be more like 1.5-1.6V at atmospheric pressure. So either something is wrong with your wiring, your sensor, or it is not actually connected to AN V2. Quote Link to comment Share on other sites More sharing options...
alexjohn Posted December 18, 2018 Author Report Share Posted December 18, 2018 21 minutes ago, Adamw said: something Map 3 pinout A to ground sensor ,B is ANvolt2 , C 5volt the wire is correct...but cant calibration? 30 minutes ago, Adamw said: something I disconnect the wire map 3 bar AN2 map(v) 0 Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 18, 2018 Report Share Posted December 18, 2018 Have you actually checked with a multimeter that there is 5V on the red wire and ground on the black? Have you checked what voltage is coming out of the sensor? Quote Link to comment Share on other sites More sharing options...
alexjohn Posted December 18, 2018 Author Report Share Posted December 18, 2018 (edited) Red wire and black wire 4.92v.out the sensor voltage is 0.52v Edited December 18, 2018 by alexjohn Quote Link to comment Share on other sites More sharing options...
Adamw Posted December 18, 2018 Report Share Posted December 18, 2018 Then if it has 5V in, and no pressure or vacuum applied to the hose, it should be outputting about 1.5-1.6V. If yours is only outputting 0.5V, then it is faulty. Quote Link to comment Share on other sites More sharing options...
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