Hi
I created this PDF file from the JTIS21 section that has the power steering system with diagrams and components lists. Also gives descriptions and how it operates with its components:

XJ Range Steering System.pdf

See page 14 - Diagram and referenced part descriptions for servotronic control module (steering control module - LNE2100AA - servotronic rack pinion steering relay) located inside near lower panel on driver side, also servotronic valve forming part of the hydraulic control valve assembly.








See page 3:
The basic steering rack assembly is not serviceable. The following components are serviceable items:
Transfer pipework, Servotronic valve, Centralizing cap, Outer ball joint, Rack gaiter, Clips and fittings

Also per the PDU User Guide -Before changing a component, check fuse No. 12 (10A) in the left-hand heelboard fuse box.

Enjoy

Jim Lombardi

 

Hi
Here is the Link to ZF Steering Gear Parts Catalog:

ZF Servotronic valve - Bing Images

Here is a one page PDF file I created from the ZF Jaguar XJ catalog page (to view the page properly you need to increase zoom in your PDF reader to 125%):

XJ Range Steering System 1.pdf

Page shows part numbers LH & RH drive, also for Sport model and non- Sport models.

Apparently the Sport has a different Steering rack than the other XJ models. Also the list price for the Sport model rack is much more expensive.

Jim Lombardi