Hi I am a new member.my name is David.I have a try l322 vogue.It has lost the sound on the rear door speakers.Can any one help.

I would start by unplugging all the connections to the dsp unit in the passenger side boot compartment and check for corrosion. The dsp unit is the large black box rearmost with the plug connections on the top. In particular check the plug nearest the centre of the car. This plug is all the speaker feeds in from the radio / amp unit and out to the speakers.
It’s not unknown for these connections to cause problems.

Hi should have mentioned my car is an 06 which is fitted with a logic 7 amp. Not the DSP.

So it is.