Land Rover's factory diagnostic systems include TestBook, Jaguar Land Rover IDS, Symptom Driven Diagnostics, Pathfinder and TOPIx Cloud Diagnostics. For coverage, dates and sources see the shared Jaguar and Land Rover diagnostics guide.
TestBook was developed through a Rover Group and Hewlett-Packard partnership, and Land Rover documented its use on the 1996 Range Rover. Later JLR IDS coverage varied by model, model year and system. HP's TestBook history; 1996 Range Rover service manual.