Honda Knock Sensor Testing: Could You See It Without A Scope?
video description
Date: 2020-08-05
Related videos
Comments and reviews: 10
Ian
Hi
I have just come across your video on how to test a knock sensor for the honda crv.
My 2004 honda crv petrol (K20A4 Engine) check engine light came on I plugged my diagnostic tool in, it came up with the code P0325 knock sensor 1 circuit bank 1 or single sensor.
I looked on youtube how to remove the knock sensor on the cvr, one way was from underneath the car by removing the front valance to gain access.
I put my car up on ramps removed the plastic front valance, I could only just see the knock sensor. I dont think I can get it out this way, even though some videos say you can remove it this way. So, I just sprayed it with WD40 and left the plastic front valance off for now.
I have deleted the fault codes and the light has not came back on yet after driving it daily.
Do you know of any way of how to do the wave test with the knock sensor still in the car? without trying to get up under the car and struggling to undo the sensor wire to put one end of the scope (diagnostic tool) to it.
I am hoping that you may know which way the wire is routed and if there is and wire connector I can undo to get to this wire.
I dont want to take off the air intake and other things yet, just to test it
Many thank
Ian
reply
Hi
I have just come across your video on how to test a knock sensor for the honda crv.
My 2004 honda crv petrol (K20A4 Engine) check engine light came on I plugged my diagnostic tool in, it came up with the code P0325 knock sensor 1 circuit bank 1 or single sensor.
I looked on youtube how to remove the knock sensor on the cvr, one way was from underneath the car by removing the front valance to gain access.
I put my car up on ramps removed the plastic front valance, I could only just see the knock sensor. I dont think I can get it out this way, even though some videos say you can remove it this way. So, I just sprayed it with WD40 and left the plastic front valance off for now.
I have deleted the fault codes and the light has not came back on yet after driving it daily.
Do you know of any way of how to do the wave test with the knock sensor still in the car? without trying to get up under the car and struggling to undo the sensor wire to put one end of the scope (diagnostic tool) to it.
I am hoping that you may know which way the wire is routed and if there is and wire connector I can undo to get to this wire.
I dont want to take off the air intake and other things yet, just to test it
Many thank
Ian
reply
Dale
Even as a DIY guy I have a scope and bidirectional scan tool. Why give the dealers the money when I can do most of it myself. The labor and charges saved over the years will make my money back since I keep vehicles long term.
I do a little side work to help offset some costs but not much enough to pay for the scan tool & scope. It's a learning experience and I love doing it even as a hobby. I was sold on Scope few years back as soon as I watched a ScannerDanner video. Even broke down and bought the book. You need this stuff with today's complex vehicles.
IF you love what you do you'll never work another day in your life
reply
Even as a DIY guy I have a scope and bidirectional scan tool. Why give the dealers the money when I can do most of it myself. The labor and charges saved over the years will make my money back since I keep vehicles long term.
I do a little side work to help offset some costs but not much enough to pay for the scan tool & scope. It's a learning experience and I love doing it even as a hobby. I was sold on Scope few years back as soon as I watched a ScannerDanner video. Even broke down and bought the book. You need this stuff with today's complex vehicles.
IF you love what you do you'll never work another day in your life
reply
Randy
Thanks for this video! I recently had knock sensor codes on my 02 Toyota and, sadly, I have limited DIY tools. No scope, not that I would have known how to use it anyway. And 'Son of a Monkey to get to' is putting it mildly. When I got to it, the sub harness was trash. old with brittle connectors from years in the engine heat, and that could have well been the issue right there, but being so danged difficult to get too, there was no way I was going to not replace the sensors as well. All ways wondered how I could have actually tested the old ones and now I know! Thanks again and keep em coming!
reply
Thanks for this video! I recently had knock sensor codes on my 02 Toyota and, sadly, I have limited DIY tools. No scope, not that I would have known how to use it anyway. And 'Son of a Monkey to get to' is putting it mildly. When I got to it, the sub harness was trash. old with brittle connectors from years in the engine heat, and that could have well been the issue right there, but being so danged difficult to get too, there was no way I was going to not replace the sensors as well. All ways wondered how I could have actually tested the old ones and now I know! Thanks again and keep em coming!
reply
Sir
I just had this exact thing happen on a 2002 sienna. The old knock sensors tested good with a DVOM and strike tests but due to them being down in the V of the engine I changed them out and code gone. Guessed correctly but standard test was not definitive. Found Denso knock sensors for 18 each. I am glad I did because coolant hose in V was a disaster. I replaced it along with wire harness since I had it apart. Worth being a parts changer on this DIY job. Saved
reply
I just had this exact thing happen on a 2002 sienna. The old knock sensors tested good with a DVOM and strike tests but due to them being down in the V of the engine I changed them out and code gone. Guessed correctly but standard test was not definitive. Found Denso knock sensors for 18 each. I am glad I did because coolant hose in V was a disaster. I replaced it along with wire harness since I had it apart. Worth being a parts changer on this DIY job. Saved
reply
Chris
Great video, Eric. I had a Honda come into my shop today with a P0325. Hooked up the scope and tapped the block and the signal looked like garbage. just like the bad sensor in your video. It's nice to be able to tell the customer with certainty exactly what they need and know that it's going to fix their vehicle.
reply
Great video, Eric. I had a Honda come into my shop today with a P0325. Hooked up the scope and tapped the block and the signal looked like garbage. just like the bad sensor in your video. It's nice to be able to tell the customer with certainty exactly what they need and know that it's going to fix their vehicle.
reply
QQTrick1QQ
A PRINCIPLE called entropy operates throughout the universe. Entropy is defined as the ultimate state reached in the degradation of matter from the physical and chemical action of weather, and friction from use. It is the principle we sometimes complain about as our automobile wears out needing repairs.
reply
A PRINCIPLE called entropy operates throughout the universe. Entropy is defined as the ultimate state reached in the degradation of matter from the physical and chemical action of weather, and friction from use. It is the principle we sometimes complain about as our automobile wears out needing repairs.
reply
autos
Literally just having gotten a scope I am really getting a ton of valuable information from your scope vids. Thank you!
I'll add, I do like it when you explain exactly how and where you are making connections to test points. That gives us a good starting point when testing on our own.
reply
Literally just having gotten a scope I am really getting a ton of valuable information from your scope vids. Thank you!
I'll add, I do like it when you explain exactly how and where you are making connections to test points. That gives us a good starting point when testing on our own.
reply
Zama
Hi, You can also use FFT mode of the scope to see frequency and power distribution (spectrum) of these two sensors. Apparently defective one adds extra harmonics to the measurement and this (harmonic distortion) can be seen better on frequency domain. Thanks for the video.
reply
Hi, You can also use FFT mode of the scope to see frequency and power distribution (spectrum) of these two sensors. Apparently defective one adds extra harmonics to the measurement and this (harmonic distortion) can be seen better on frequency domain. Thanks for the video.
reply
BuddysAdventures
The no 1 reason for me owning a scope? When I break out the Modis and the leads people step back and it makes me look like I know what I'm doing. fools everyone! Besides, how can one resist not adding a new tool to the inventory! retirement is overrated! :p
reply
The no 1 reason for me owning a scope? When I break out the Modis and the leads people step back and it makes me look like I know what I'm doing. fools everyone! Besides, how can one resist not adding a new tool to the inventory! retirement is overrated! :p
reply
MacDonalds
considering where the knock sensor it on that car, would you be comfortable/confident in probing the line someplace convenient to see the waveform? Just thinking it'd be easier to do that then remove and WOULD confirm if it's an ECM problem not the knock sensor.
reply
considering where the knock sensor it on that car, would you be comfortable/confident in probing the line someplace convenient to see the waveform? Just thinking it'd be easier to do that then remove and WOULD confirm if it's an ECM problem not the knock sensor.
reply
Add a review, comment
Other channel videos
