Seems a useful thing to know how to do if its possible. No need to merge posts
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| spare knock testing http://www.gt4dc.co.uk/forum/viewtopic.php?f=2&t=6957 |
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| Author: | jdm-gt4 [ Thu Feb 20, 2014 4:48 pm ] |
| Post subject: | spare knock testing |
ive got a spare knock sensor, but im unsure if its a working spare or not obviously without test fitting it to see if its working (I don't really want to go to that much trouble if possible?) is there a sure way of testing them ? Ive read that you can hear a rattle when shaken but its not a definitive method (this can be merged with my other code 52 post if the staff see fit) |
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| Author: | Sirius [ Thu Feb 20, 2014 5:08 pm ] |
| Post subject: | Re: spare knock testing |
Seems a useful thing to know how to do if its possible. No need to merge posts
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| Author: | Nibbles [ Thu Feb 20, 2014 5:16 pm ] |
| Post subject: | Re: spare knock testing |
Not aware that it's posible, not electrically with a meter anyway. In theory, place on a loudspeaker driven at the resonance frequency (6-8KHzx from memory) and measure the AC voltage out. Not actually set this up to try so unsure of the sound levels required. |
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| Author: | Sirius [ Thu Feb 20, 2014 11:57 pm ] |
| Post subject: | Re: spare knock testing |
I'm now envisaging Marcus testing in something like the first scene from Back to the Future where he plugs the guitar into all those amplifiers! 
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| Author: | niblettr [ Fri Feb 21, 2014 9:07 am ] |
| Post subject: | Re: spare knock testing |
If you have an oscilloscope, you can wire it up and set the volts/div to 500mV (or less) then tap it gently and see if you get and output.. |
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| Author: | niblettr [ Fri Feb 21, 2014 9:07 am ] |
| Post subject: | Re: spare knock testing |
http://stevehackett4826.blogspot.co.uk/ (see last photo) |
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| Author: | jdm-gt4 [ Fri Feb 21, 2014 12:02 pm ] |
| Post subject: | Re: spare knock testing |
thanks for the detailed replys, i had looked into it before hand and it seems its like niblettr explained and a little beyond the average DIY`er even in the toyota repair manual, im sure its more of a swap-out part rather than test part i think when i come to changeing mine and checking the wire, i will try the one i have and have a new one to order on standy in my mind its one of those parts that needs to be brand new, just to rule out its working 100% |
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