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[tunnie]

Just gave up on the 3.2, I get a constant tone. I popped to DIY shop and parallel park = Working.

Pop to Tesco, reverse in = Working.

Get home = Failed 

Tried the trick listening to each one, can't hear anything. Any other good way to test?

[biggriffin]

Use the good old skool way, MK1 eyeball, works for me.

[Doctor Gollum]

Ignition on and into reverse.

Gently place a finger tip on each sensor. The one that doesn't tingle is the dodgy one. Give it a slap

[Doctor Gollum]

Use the good old skool way, MK1 eyeball, works for me.

Won't tell you which one isn't working

[Andy H]

Just gave up on the 3.2, I get a constant tone. I popped to DIY shop and parallel park = Working.

Pop to Tesco, reverse in = Working.

Get home = Failed 

Tried the trick listening to each one, can't hear anything. Any other good way to test?

I thought there was a guide which explained how to remove a test plug (which is actually a resistor) and then count the beeps to learn which sensors are fubar (or maybe it is tother way round - remove a link and insert a resistor  )

[Doctor Gollum]

There is but without wishing to stir the past, the finger test is sooo much easier

[Andy H]

There is but without wishing to stir the past, the finger test is sooo much easier

I can't find a guide as such - this thread hints at the answer I was thinking of.

[tunnie]

Thanks all. I shall get the finger out tomorrow. 

[TheBoy]

The finger trick mostly works, but using the built in diagnostic system tells you what park pilot thinks is wrong.

Both are valid, finger is quicker, but diags more conclusive for many.

For finger trick, you're feeling for a tiny vibration in middle of sensor.

For diag, do a search, Entwood posted up a guide from TIS.