Side impact sensor - offside ?????

[SD1too]

Originally Posted by chris75

The piezoelectric effect is the most common form of accelerometer and uses microscopic crystal structures that become stressed due to accelerative forces. These crystals create a voltage from the stress ...

This is the principle used by crystal and ceramic pick-up cartridges on record players which you'll remember if you're a certain age Chris.

Originally Posted by chris75

So I should have hit it with a hammer whilst measuring voltage .....

I think it's fair to say that these impact sensors cannot be tested. If they get wet, they are likely to fail and replacement seems to be the best option.

Simon