I don’t know how many times I’ve been driving down the road and a Honda Odyssey van or an Acura MDX will pass by and it sounds like it has a supercharger in it. It’s the transmission, ready for a rebuild at the local transmission shop.
There are times in the diagnostic process when it comes down to deciding whether the malfunction is caused by the computer or not. It’s not so bad to take a chance with the computer if it costs $150 or less dollars. But it’s a big decision when you are looking at $1,200!
I feel as far as diagnosing vehicles goes resistance usually is the only specification given, and the means of testing the resistance of anything is usually right at hand in most technicians toolboxes.
One of the most difficult things to diagnose in the automotive electronics world is electrical noise. There are more ways to cause noise, and noise is often classified as different things: distortion, interference, jamming, etc. Just to make it easier to talk about, we will just call it all noise.
Recently, I had a conversation with Bernie Thompson from Automotive Test Solutions were we had a discussion of what it would take to write a program to make just one up-shift. But as you really dig in, there are so many other factors in play.
There is a very sophisticated traction control system utilizing a Dynamic Stability Control (DSC) strategy. Part of this braking system includes an Electro-mechanical Actuating Unit (EMF). That information is important to know.
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