Please can anyone help I have an XKR 2007 and it is fitted with XKRS 2013 shocks and springs om. I need to find out if these will work with the car ?? CATS are pluged in but seams like its dancing on the springs ?? Any help with this woul be welcome, thanks.

 

The only thing I can think of is perhaps a CATS compatibility issue? from 2006-2008 CATS was 2-mode, from 2009 and on Jaguar went to a continuously variable damper, not certain if the dampers are the only difference or if CATS was changed too, I suspect it was, due to the Dynamic mode software that also came with the new model.

 

Thanks for this info I think this sounds correct, I will call bilstein tomorrow to find out if they can help and clarify what you say. I will let you now many thanks ��

 

Yeah, the ADCM (adaptive damping control module) is different, so I imagine the signals the '07 module is sending to the '13 shocks is not correct. The '07 module is saying "hard, soft, hard" and the shocks are going ¿Que? No comprende...
And I suspect there's almost no way to get a '13 ADCM to work in an '07 car - all of the modules are so heavily interrelated in the XK, everything talks to everything else and it's very hard to fool the system.

 

Bit more info. This is the 4.2 system:

And this is the 5.0 system:

 

Thanks for this info it seams I'll have change the shocks for the originals ! So as stated above the shocks are always in a firm setting as the CATS will not operate them ? You say the 07 had 2 modes so is mode 1 in normal drive and mode 2 is when sport is selected ? Thanks again for this great info guys.

 

The default mode on all cars is the hard setting, i.e. if everything goes kaput, you'll be driving around in an under-damped and pretty jumpy car.

On the 4.2 cars, the ADCM send a burst of power to the shock to kick it into soft mode and then keeps a constant lower current to hold it there until the ADCM wants it to go back to hard. The ADCM can do that on an individual-shock basis, so it can change one side of the car when cornering, for example. It's based on 14 different inputs, like lateral acceleration, steering angle, throttle position, etc. Sport setting on the transmission is not one of the inputs.

On the 5.0 cars, the power level being sent determines the stiffness - no power = full hard, full power = full soft, anything in between gives an in-between level. So the adjustment is much more 'granular' and can be set to the optimal setting by the ADCM based on about 28 different inputs. It does that about 500 times a second! Again, transmission mode isn't one of the inputs, but Dynamic Mode changes the ADCM mapping.

 

Hello again I've got to say you are the man ! No dealer has this info that I have spoke to and couldn't advise !! The shocks will be coming off and a new OM set will be used, this will bring the car back to driving properly. I'll keep you posted when this will be done ! Once again many thanks for this info....

 

Most of my info comes from the workshop manual, plus a little from some conversations I've had in the past with Jaguar people. I don't have any hands-on experience working on the XK - I don't even have a garage to work in!

It's a shame you can't use the later shocks; the problem with our cars is that they're very 'integrated', and it's hard to upgrade anything because a load of other parts of the car are involved.