|
Title: NEED RESISTANCE CHART Post by: W2PFY on May 31, 2018, 07:38:05 PM This is not exactly about ham radio but it's for my van that my mobile rig is in.
I am looking for a resistance chart for all the sensors that typically go into most if not all modern cars, trucks, and vans. There must be somewhere a list of the resistance values of the many sensors used in these vehicles? I have Googled myself to the point of going bat nuts looking for a list of the most common sensors in vehicles. Does anyone have a source? It seems to me that this should be a way to test these parts without having to buy a very expensive scanner that you would use with a laptop for example. I have a nice scanner but it relies on engine codes but if your having a problem, a scanner code does not always show up for you to chase a problem. I am not looking for help with my problem as one symptom can lead you to 75 different solutions for one problem! I just would like to find out what the manufactures specifications are in ohms for a given sensor. Any help would be greatly appropriated. Thanks Terry Title: Re: NEED RESISTANCE CHART Post by: Opcom on June 04, 2018, 02:32:52 AM Have only ever got something like that by purchasing the official shop manual. $$, and then dig through it for every trouble, section on testing every sensor. Not fun.
Title: Re: NEED RESISTANCE CHART Post by: w4bfs on June 05, 2018, 09:19:16 AM according to my car repair guru some of the sensors are not just resistive but 'smart' with digital outputs.... Toyota 96 and later uses an oxygen exhaust sensor that shifts frequency or pulse width as the oxygen level changes .... whew !! :P :P
Title: Re: NEED RESISTANCE CHART Post by: KD6VXI on June 05, 2018, 11:02:54 AM Most sensors that can have a quick go/no go test are of the older variety. To get the requested resistance charts, as Opcom stated... You usually need a factory service manual. Gone are the days when Haynes or Chilton are worth anything. Since they are owned by the same company, you get sanitary garage mechanic crap. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Be careful. A LOT of the sensors are digital now. Digital to the point of being able to talk and interact with the service equipment at a dealership..... And for the better connected in dependant shops too. Ie Hyundai Genesis system... HUGE bucks, but cuts diagnostic time to minutes on any hyundai product it has the downloads for. BMW.... 5 separate computer networks. Not one is addressable by simple users except OBD-2. You can purchase specific scanners for your make / model on eBay. Some are bidirectional (programmers and scanners) that will allow you to change fuel maps, etc. BUT, all the newer OBD 2 cars are pretty much not resistance measurement anymore. --Shane KD6VXI |