fault code L322 2006 P0646-08

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TUNBRIDGE WELLS
ok, so i'm either being thick or blind... fault code A/C control relay malfunction...is this an issue with the compressor solenoid, the climate control unit in the car ie 'electronic relay on the circuit board' (which is being changed shortly anyway) or is there a relay somewhere that i can't find...have been through wiring diagrams and as far as i can see the wiring goes straight from the internal CC unit to the a/c compressor.
When this all started to go tits up the initial iid tool diag said a/c comp relay fault to earth. Have no blown fuses, smell of burning electronic components has been stopped via removal of some of the plugs in the cc unit.... any ideas?????
 
The clue is in the DTC prefix - 'P' is Powertrain so it will be relating to the condenser or engine cooling fan. the circuit diagram below is from a later MY but may help
Screenshot (568).png
 
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