A full JLR diagnostic scan on the same dealer-level software the franchised network uses, SDD and Pathfinder, backed by Jaguar Land Rover's own technical data through our TOPIx Cloud subscription. From reading trouble codes to module programming, wiring faults and live data analysis, all under one roof.
Most independents have a scan tool. That is one of the three, and on its own it is the least useful. Here is the full picture, so you can judge it against the dealer quote in front of you.
TOPIx Cloud is JLR's own technical platform, and we hold a subscription to it. That gives us genuine wiring diagrams, technical service bulletins, workshop procedures and the manufacturer's approved repair methods for your exact vehicle. Your diagnosis is backed by JLR engineering data rather than a generic aftermarket database or trial and error.
Land Rover SDD covers the established Jaguar and Land Rover range. Pathfinder covers the newer vehicles that have moved off SDD. We hold both, so structured, symptom-driven fault finding across every module is available whether you are in a 2010 Discovery 4 or a current Defender.
Finding the fault is only half the visit. We carry out ECU updates and reflashes, module replacement and adaptation, feature configuration and software fault correction here in the workshop. Most software faults are corrected on the same visit instead of being booked back in.
JLR vehicles have dozens of interconnected control modules. A generic OBD scanner picks up surface-level codes, but will not tell you which is the root cause, which are secondary symptoms and which are red herrings.
Active, stored and pending faults all sit in the Jaguar Land Rover ECU, and reading them correctly takes technicians who work on these vehicles daily. We have for more than 20 years, and we know the repeating patterns. A generic tool also cannot perform module programming or ECU recalibration. Our SDD and Pathfinder software can, and TOPIx Cloud gives us the manufacturer's own procedure for doing it correctly. That is the difference between finding a software fault and fixing it on the same visit.
We connect through the OBD port and scan the whole vehicle. Codes are interpreted in context, because a code points to a circuit or system, not always the faulty part.
| Module | What we check |
|---|---|
| Engine ECU | Active, stored and pending fault codes, fuelling, timing, sensor data |
| Transmission module | Gear selection faults, clutch pack data, fluid temperature readings |
| ABS & braking system | Wheel speed sensor codes, pump and valve faults |
| Air suspension ECU | Compressor faults, height sensor errors, corner isolation codes |
| Airbag module | Deployment circuit faults, crash data, sensor integrity |
| Body control module | Lighting, central locking, comfort system faults |
Where the scan points to a mechanical or engine-level fault, we do not hand you a report and send you away. Jaguar and Land Rover engines are rebuilt, reconditioned and replaced in the same workshop.
Plenty of JLR faults never produce a clean code. A module stops talking to the others, a warning light appears only in the wet, the battery is flat every third morning. These are wiring and circuit faults, and they are found by testing the circuit itself, not by reading a code and replacing the part it names.
This is the work most garages turn away, because it is slow and it needs the manufacturer's circuit diagrams to do properly. Our TOPIx Cloud subscription gives us those diagrams, which is what lets us trace a fault to the exact wire and pin instead of replacing parts until it clears.
A fault that shows only when cold, only over bumps or only in the wet is usually a connection rather than a component. We test under the conditions that actually cause it.
When a module stops responding, the cause is often the network between modules rather than the module itself. We test the bus before anyone condemns an expensive ECU.
A battery that goes flat over a few days is being discharged by something. We measure the draw and isolate the circuit responsible rather than selling you another battery.
Chafed insulation, water in a connector and corrosion inside a plug all produce faults that read like sensor failures. We find and repair the wiring itself.
Meter and oscilloscope testing shows what is really happening in a wire: voltage drop, signal quality and momentary breaks that a scan tool never sees.
Working from genuine JLR circuit diagrams, we identify the exact wire and pin a fault sits on. That is the difference between a repair and a parts bill.
Same software, same technical data, same depth of scan. Your warranty stays intact and your service history is updated.
Jaguar, Land Rover, Range Rover, SDD, Pathfinder and TOPIx are trademarks of Jaguar Land Rover Limited. We are an independent specialist. We are not affiliated with, authorised by or an agent of Jaguar Land Rover Limited, and we name their systems only to describe the equipment and information we work with.
Bring it to us. We find what is driving the fault, not just what the code says.
Both need the same dealer-level access as a diagnostic scan, which is why they sit with us rather than with a general garage.
Lost every key, bought a Jaguar or Land Rover with only one, or have a key the car no longer recognises? We supply and programme replacement keys and fobs, and programme them to the vehicle's immobiliser so it starts and runs correctly.
If you are down to one key, a spare programmed now costs considerably less than a lost-all-keys job later, which needs far more work. Proof of ownership and identification are required before any key or immobiliser work is carried out.
A blocked diesel particulate filter brings on warning lights, limp mode, poor economy and failed regeneration, most often on vehicles doing short, cold journeys. We clean and restore the filter so it works as designed.
We also look at why it blocked. A DPF that blocked once will block again if the cause is still there, so the diagnostic scan runs alongside the clean. We do not remove or delete DPFs: removal is illegal for road use and an automatic MOT failure.
Many diagnostic visits are freshly bought vehicles, privately or at auction, with warning lights on or faults only vaguely described by the seller. Buying a Discovery 4, Range Rover Sport or Jaguar XF with a known fault is not necessarily a bad choice, provided you know what the faults are and what they will cost first. A pre-purchase scan tells you:
The more we know before the visit, the faster we find the fault:
A battery change on a Range Rover Sport or Jaguar XF can set stored codes across several modules that would otherwise clear on their own. Knowing that saves needless investigation.
Send your registration and we will confirm your engine code, tell you what the likely fault is, and put the cost in writing. If the cheaper option is the right one, we will tell you that too.
Our Ilford workshop serves London and Essex directly, and we supply, deliver and arrange fitting for Jaguar, Land Rover and Range Rover owners across the rest of the UK. Wherever your vehicle is, we can help.
Do not see your area? We cover the whole of mainland UK for engine supply and delivery.
It reads every control module through the OBD port, engine ECU, transmission, ABS, airbag, air suspension and body control, and our technicians retrieve and interpret all active and stored trouble codes.
Land Rover SDD and Pathfinder, the same dealer-level software used across the JLR franchised network, with full access to all modules including module programming and ECU recalibration. We also hold a TOPIx Cloud subscription, which is JLR's own technical information platform.
It is Jaguar Land Rover's own technical information platform. Our subscription gives us genuine wiring diagrams, technical service bulletins and the manufacturer's approved repair procedures for your vehicle. In practice it means a diagnosis based on JLR's own engineering data, which matters most on electrical faults where a generic database simply does not have the circuit.
Yes. SDD covers the established range and Pathfinder covers the newer vehicles that have moved off SDD. We hold both, so current models are diagnosed and programmed here in the same way as older ones.
Yes, and it is a large part of what we do. Intermittent faults, non-communicating modules, parasitic battery drain and corroded looms rarely produce a clean code. We test the circuits themselves and trace the fault to the exact wire and pin using genuine JLR circuit diagrams.
Yes. We supply and programme replacement keys and fobs and programme them to the vehicle's immobiliser. Proof of ownership and identification are required for any key or immobiliser work.
No. We clean and restore diesel particulate filters so they work as designed, and we diagnose why the filter blocked. Removing or deleting a DPF is illegal for road use and an automatic MOT failure, so it is not something we offer.
Sometimes, yes. Fault codes can be stored without a visible warning. If your car runs roughly, loses power or burns more fuel than usual, a health check can reveal faults not yet at the threshold to light the dashboard.
The scan detects the fault. Software problems can be solved the same day by module programming or an ECU reset. Mechanical failures are repaired here, including full engine rebuilds where needed.
Yes. Clearing a code without correcting the fault means it returns. We use live data analysis and fault code reading to find what is actually causing it, including intermittent faults only seen under certain conditions.
No. Using a qualified independent JLR specialist does not affect the manufacturer's warranty under UK consumer law, and we update your service history during the visit.
Around 45 to 60 minutes for a full system scan. If the fault is intermittent and needs live data analysis on a road test, we agree the timescale with you beforehand.
Yes. We run dealer-level diagnostics on JLR hybrid and PHEV models, including Range Rover and Defender plug-ins, covered by our SDD and Pathfinder software.
Most vehicles that come to us need more than one thing looking at. These are the services most often booked alongside this one.
Engine repairs across Defender, Discovery and Freelander, diagnosed on SDD first.
Land Rover RepairsEngine, gearbox, suspension and electrical repairs for the full Range Rover range.
Range Rover RepairsInjector cleaning, fuel diagnostics and GDI carbon cleaning, the usual cause of DPF faults.
Fuel System CareFull system scan, live data analysis, wiring diagnosis and module programming at our Ilford workshop in East London. Had a code cleared elsewhere and it is already back? Bring it to us.
