Diagnostics & tools

The L322 is a heavily electronic car, and proper diagnostics are essential, for air suspension and gearbox especially, a cheap generic code reader is not enough. Knowing what kit reads what will save you money and wrong-part guesswork.

In short: Proper diagnostics are essential, for air suspension and the gearbox, a cheap generic reader is not enough.

Diagnostic systems

TestBook/T4 and SDD/SDS are OFFICIAL Land Rover tools; the others are established INDEPENDENT / enthusiast tools.

System	Use
Land Rover TestBook / T4	Factory tool for cars up to ~2005
JLR SDD / SDS	Factory tool for 2005-on cars
IID Tool / GAP IID	Popular owner-level tool for deep L322 access
Launch X431 / similar	Capable independent scanners (read EAS?EAS: Electronic Air Suspension, air springs at all four corners giving variable ride height and a smooth ride., ZF, etc.)
Nanocom / Hawkeye	Land Rover-focused enthusiast tools

Why proper kit matters

DON'T GUESS No air-suspension part should be replaced on symptom alone: read individual height sensor live data first. The same goes for the gearbox: many "failures" are a position sensor or low voltage, not a €3,500 rebuild. Diagnose, then fix.

Useful home tools

An OBD2 reader that can read manufacturer codes (and ideally EAS) for quick checks.
A thermal/IR thermometer, compare front/rear disc temps to spot a sticking EPB.
Decent jack and axle stands, and the relevant Torx/E-Torx sockets for driveline work.
The RAVE workshop manual (covers procedures, torques, fluid specs).

Notes

For the gearbox fluid level you need to monitor fluid temperature (around 35-45°C), which is why a capable tool and the correct procedure matter. When in doubt, use a known L322 specialist. See running costs.

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