l322 air suspension inactive on dash

gentlemen, met a friend this eve in her 322, i noticed t dash had air suspension inactive on it, she said she had it in t garage for a new wiper motor and it came back like that, now wants me to have a look at it, any ideas anyone, whats t first port of call. thanks.

I know is not much help, but I found this in the Rave manual.......
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Fault Messages
The air suspension has two methods which it can use to inform the driver of a fault in the air suspension system; the
air suspension control switch LED's and the instrument pack message centre.
When minor faults occur and the air suspension ECU is able to level the vehicle to the 'current' ride height, the control
switch LED's will display the current ride height. When the vehicle returns to the standard ride height and further height
changes are disabled, the 'HOLD' LED in the control switch will be permanently illuminated.
The air suspension ECU suffers a major failure and there is no air suspension control, all the control switch LED's will
remain unlit.
If a fault occurs and the ECU can determine the ride height and the vehicle is not above standard ride height, the driver
will be notified via a 'AIR SUSP. INACTIVE' message in the message centre. If the ECU cannot determine the height
of the vehicle the 'AIR SUSP. INACTIVE' message is accompanied with an alternating 'MAX 35MPH' message.

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You really need to get the faults read.