jaguar 2000 s type CATS SYSTEM FAULT message what does it mean

 

Means you have a code(s) logged from your CATS module and your struts are locked into hard position and your cat will ride like a stiff board.

 

You'll need to have it scanned by someone with a high end scanning system like AutoEnginuity with the Jaguar module added. CATS codes log with "C" prefixes (Chassis codes) - haven't seen a DIY scanner that can access those.

 

You could also use a mongoose clone and the Jaguar SDD/ICE programme but you would need to use a early version such as 1.30.

Have you the checked the connections on the top of the struts are in order. I have heard of them coming loose.
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Other ideas:
1. water in the trunk (boot)
2. low battery

 

also corroded pcb on suspension ecu. it was case in mine XF also TPMS goes corroded same way as they are together (near airflow tunel to back passenger)

 

Good thinking - but no TPMS in the S-Types.

 

but there is supension ecu. and if the locating space same it vould have same problem. I went mad after measuting resistances of solenoids to short (according to SDD) but nothing shorted. so I disasembled suspensio ecu and saw corosion and coroded pacb tracks.

 

That's why I posted about water.

 

So where would that ecu be that makes an s type throw the cats fault code

 

There's info on all such locations in the Electrical Guide - free download on this site or JagRepair.com - Jaguar Repair Information Resource