Hi everyone.. wanted to ask if any one knows what the air suspension gallery pressure should be during normal operation (2010 L322 4.4 tdV8
I have an intermittent Suspension fault that gives 2 errors, ‘Pressure does not decrease when venting gallery’ and ‘exhaust valve - general electrical failure’ . Thing is I have had the exhaust valve replaced and it made no difference, so I did a bit of ID Tool testing and found that the fault is triggered when the gallery pressure jumps up massively and then drops again (see attached photos). As the pressure jumps up instantaneously I am guessing that there is no actual physics involved, rather a sensor somewhere with a bad connection.. so 2 questions, firstly does anyone know what I would need to replace (assuming it’s not the wiring loom) and secondly from the graphs attached can anyone confirm if 270kPa or 400kPa is the ‘correct’ pressure in the gallery??

Thanks and fingers crossed.. C.

Click image to enlarge

Click image to enlarge

Click image to enlarge