your car still has the arch kit on showing by your pic so u could have the change over loom on yours what i mean is on some n reg vr6s u will still have the obd1 manifold engine loom and throttle body and isv but inside the car the rest of the loom is obd2 so u have the reader and immboliser this was the swap over period from obd1 to obd2 not all n reg vr6s r like that but i had one that was like it and sparks had the same in his mk 2 when he convertered and took everything off a n reg vr6 so could be immobiliser but could be isv sorry if it sounds confusing