"Aren't these things piezo electric devices?"
Yes, but some (most today) require a bias voltage supplied to them in order to turn them on, and then they produce their signal over-top of the bias voltage. Typical strategy is to use a 5v reference, which gets dropped across an internal PCM...
"the one in my left bank is not outputting any ohms"
Mike wrote. "Did the ECU say the knock sensor isn't working? Why did you break out the ohmmeter in the first place?"
Because that is how horrible trouble trees are for technicians when they are faced with diagnosing a circuit for the first...
In short, no it is not feasible to attempt to make your vehicle disable cylinders. There is much more to it than just shutting down the injection system. Vehicles that are engineered to do this today also disable the valve train, and modify the dampening of the engine mounts among other things.
The two sensors are in fact different, they respond to different frequencies which allows for a more accurate recognition of detonation, and better ability to disregard mechanical sources of noise which might sound like detonation to a single sensor.
Attempting to jumper them together wont...
JSteve, at the risk of being picky, reverse in the Prius is completely powered by MG2. If the ICE is used for generation with MG1 and the vehicle is in reverse you do indeed have series operation. We classify the Toyota, and Ford systems as full Series/Parallel hybrids.
Word of caution. I know you already have this done but depending on the model and year the front engine mount may use TTY bolts. If it does they must be replaced every time they are removed. Attempting to re-use them works for a brief period of time, but they continue to stretch, then loosen...
Hi Mike. You are absolutely correct, electronics have made vehicles more reliable. One unfortunate side effect though is the randomness of the problems that we do see. Not all that long ago 99% of the diagnostics on a vehicle that visited my shop last week took little more than experience to...
Thru. Many of today's systems to control emi (noise) use bussed grounds inside the PCM. That way if some type of EMI is induced into the sensor, it moves the ground voltage level as well, and allows the PCM to see the correct sensor output.
Cloves, nice to see that you did see my input, when...
Bill, if you are really shocked at the idea of 24 modules on two communication networks, imagine 104 (nodes) on five networks, with two subordinate gateways and a master.
Now imagine "trouble tree" type diagnostic routines created by an engineer who adds a fault to the vehicle, and then...
Cloves...
First, always use the correct sensor, not one that claims to be a universal fit. Second crimp connectors and such are not made for the precision repairs that are demanded by the computer controls on today's cars.
Start by looking in service information at the code set criteria, and...
Hi Greg.
Short return visit here, I'm not planning on spending any real time here in these forums. I just to let you know the last car that I had to diagnose for improper antilock operation was a 96 Lexus ES300, Bosch system. This vehicle could enter antilock operation inside the shop, under...
"I am not really any closer to understanding my vibration but may be equipped to observe it better now and do some tests."
Your welcome. Being able to take these steps right here will allow you to make progress if it's possible. Take notice of the possibilities that Pat outlined, they are all...
Too funny.....
One would expect that performing accurate diagnostics should generate more support than the suggestions that simply tossing parts guessed correctly seems to.
Bad tires make a specific kind of noise depending on exactly what is wrong with them. Mike you described (loosely)...
