ok so I attached wiring diagram for a Inductive Type Sensor– 2-Wire and hooking the Pico up to crk 830,872,884,882 then ground lead to negative cable. I cannot get a signal out. the vehicle itself does read the sensors but the Pico does not. Now there is no fault in the system we are just teaching students how to test. this is a 2023 Sierra we have next to it a 2023 Camaro same system it will read. does anyone have any ideas why some would some wont are any ideas other was to test the system using a scope?
Hi Bill, The wiring diagram is more likely for magnetoresistive speed sensor design. There is 12V power supply and the ground wire would be the signal wire. See this post where is also psdata. file attached which includes a math channel for speed graphic visualisation. viewtopic.php?t=22488 You can test it on your case then.
Also see this link as there is possibility your sensors are also directional. viewtopic.php?t=23182 Hope it helps you.
Regards, Roman