iCarsoft LR V4.0 for Land Rover and Jaguar

Air suspension is what makes a Range Rover a Range Rover. It is also what makes a generic OBD2 reader useless on one. The four EAS valve blocks, the compressor, the height sensors, the system pressure logic, the calibration routine that has to run after a sensor swap: none of this lives in the engine ECU, and almost none of it is in a multi-make scanner. The LR V4.0 was built for it. Full-system access across Land Rover and Jaguar on the shared JLR diagnostic stack, bidirectional control to actually exercise the components, and the air-suspension service routine in the headline function set. The same depth applies across the rest of the JLR line: Defender, Discovery, Evoque, Velar, Freelander, plus Jaguar XE through F-Pace, I-Pace and the older S-Type and X-Type.

Which vehicles the iCarsoft LR V4.0 covers

The iCarsoft LR V4.0 is focused on Land Rover and Jaguar (JLR) brands. Coverage and the depth of specific service routines vary by model year and ECU configuration. Verify your exact vehicle in the coverage list before relying on a specific job.

• Land Rover
• Range Rover
• Range Rover Sport
• Range Rover Velar
• Range Rover Evoque
• Defender
• Discovery
• Discovery Sport
• Freelander
• Jaguar

All-system diagnostics that go beyond OBD2

JLR all-system means engine (Ingenium AJ200 petrol and diesel, AJ-V8, AJ-V6, AJD diesel V6 / V8), transmission (ZF 8HP automatic, MPS6 dual-clutch on older Freelander 2 and Evoque, manual on entry-level Defender), ABS / DSC, SRS / RCM, body control (BCM), instrument cluster, climate, comfort, and on most JLR vehicles the air-suspension module (EAS on older Range Rover, EHC on current). On diesels the after-treatment stack (DPF, EGR, AdBlue tank, NOx sensors) is a full separate diagnostic island. The LR V4.0 connects to each of these where supported, reads codes, captures freeze frame and live data, and reads ECU software identifiers for cross-referencing.

The depth differentiator vs. the multi-make DE V4.0 is in the JLR-specific modules. Air-suspension calibration routines, EAS valve actuation on bidirectional, DPF replacement marking on diesel, and the body-module work that has to happen after a battery disconnection on a modern Range Rover (windows and roof reset, door-module re-learn): all in the LR V4.0, mostly absent or shallow on the DE. Coverage is strongest on 2006-onwards JLR. Pre-2006 Land Rover (Discovery 2 Td5, P38 Range Rover, Freelander 1) is supported on KWP-2000 with the appropriate diagnostic protocols, with the depth limitations you would expect on simpler cars.

Bidirectional active tests for verified repairs

Bidirectional control on JLR covers the routine workshop tests (cooling fan stages, A/C clutch, throttle body actuation, fuel pump priming after a sender or rail-pressure swap, EPB caliper retraction for rear-pad service, ABS modulator cycling for a brake bleed) and the JLR-specific stuff that matters: EAS valve actuation on Range Rover air suspension, individual height-sensor live data against commanded ride height, EHC compressor cycle test, AdBlue pump priming after a tank service, EGR actuator sweep on diesel, and on supported models the windows and roof re-initialisation after a battery disconnect.

Where the LR V4.0 stops short is in two specific places. First, it does not do full JLR module coding the way Pathfinder or SDD does. You can re-code injectors, run adaptation after replacement, perform AdBlue resets and DPF marking, but flashing new software into a replacement module needs the factory tool. Second, on 2024-2025 Defender L663, Range Rover L460 and Range Rover Sport L461, the SGW / SFD security gateway restricts some advanced functions until manufacturer authorisation is granted. The LR V4.0 will read diagnostics and run safe service routines, but the deepest dealer-only routines on these brand-new vehicles need JLR Pathfinder online access.

What the LR V4.0 looks like in practice

Four signature workflows where the tool earns its place:

• Range Rover L405 air suspension height-sensor calibration. Replace a front height sensor on an L405 Range Rover and the EHC module has no idea where the body is. The result is corner-sag, intermittent dropping at idle, and a 'Suspension Fault' message. The LR V4.0 runs the EHC height-sensor calibration routine with the vehicle at correct ride height, writes the new sensor reference into the module, and the system stops chasing a non-existent height target.
• Defender L663 SGW-aware diagnostic session. New L663 Defender at the dealer for tyre-pressure warning that will not clear. SGW (security gateway) blocks basic tools. The LR V4.0 connects in read-only mode on supported routines: reads the TPMS module, identifies the failed sensor by ID, lets you decide whether to replace one or relearn the set. Advanced calibration on this generation still needs Pathfinder, but the diagnosis is on your bench in five minutes.
• Jaguar XF X250 2.7 TDV6 DPF replacement marking. Replacing a DPF on an XF 2.7 TDV6 without telling the ECU it is a new filter gives you instant regen-related fault codes and shortened life. The LR V4.0 runs the DPF replacement marking routine on supported model years, resets soot mass to zero, and lets the new filter start its life clean.
• Discovery 3 / 4 EAS pump cycle test. An EAS pump that runs constantly is the most common Discovery 3 / 4 air-suspension complaint. The LR V4.0 commands the compressor through its cycle, watches system-pressure live data, and tells you whether the compressor is failing, the system is leaking through a valve block, or a sensor is reporting wrong. Diagnosis without random parts replacement.

Service and reset functions on this tool

Routine availability depends on the vehicle. Below are the routines the LR V4.0 performs on supported models. Always follow the on-screen prerequisites (ignition state, battery voltage, fuel level for diesel regen).

• Oil and service interval reset. Resets the oil-life counter and service-due indicator after an oil and filter change. When: After every engine oil change or extended service.
• Throttle body adaptation and relearn. Resets and re-teaches the closed-throttle position to the ECU. When: After cleaning or replacing the throttle body, or after a battery disconnection on some makes.
• Electronic parking brake (EPB) service. Retracts the EPB caliper pistons so brake pads can be replaced, then reinitialises the system. When: Before replacing rear brake pads or discs on any vehicle with an electronic parking brake.
• Steering angle sensor (SAS) calibration. Teaches the steering angle sensor where straight-ahead is, so ESP and stability control behave correctly. When: After wheel alignment, steering rack replacement, steering column work, or any ABS / SRS warning related to SAS.
• DPF (diesel particulate filter) regeneration. Forces a manual regeneration cycle to burn off accumulated soot when passive regen has failed. When: After repeated short trips, after a sensor or EGR repair, or when the DPF warning appears.
• Injector coding. Writes the calibration code of each new diesel injector into the ECU so fuel delivery is balanced. When: After replacing one or more diesel injectors.
• ABS bleeding. Actuates the ABS and ESP modulator solenoids so trapped air can be bled out of the hydraulic block. When: After replacing the ABS modulator, master cylinder, or bleeding the brakes with air-in-the-block symptoms.
• TPMS (tyre pressure monitor) reset and relearn. Re-registers wheel-mounted TPMS sensor IDs after tyre rotation, new wheels or sensor replacement. When: After fitting new sensors, changing wheels, or rotating tyres on systems that do not auto-relearn.
• Battery management and registration. Tells the body control module that a new battery has been fitted and (for AGM / EFB) what type it is. When: Any time the battery is replaced on a vehicle with intelligent charging and start-stop.
• Air suspension service. Reads, calibrates and resets air suspension control modules including compressor and valve actuation tests. When: After replacing a compressor, valve block, height sensor or after suspension-related fault codes.
• A/C system reset and learn. Resets and re-learns climate control flap motors, compressor adaptation and refrigerant pressure logic. When: After A/C component replacement, refrigerant service, or climate-control module replacement.
• Headlight initialisation and range adjustment. Calibrates headlight aim sensors and adaptive headlight modules after replacement or alignment. When: After headlight replacement, suspension changes that affect ride height, or related fault codes.
• Transmission adaptation and learn. Resets shift adaptation values and triggers a relearn of clutch wear and shift timing on supported automatic and dual-clutch gearboxes. When: After a transmission fluid and filter service, clutch replacement on DCT, or major adaptation drift causing harsh shifts.
• AdBlue and SCR system reset. Resets AdBlue tank-level sensor, NOx sensor adaptation and SCR-related counters on supported diesels. When: After AdBlue tank refill on vehicles that need a reset, NOx sensor replacement, or SCR fault clearing.
• NOx sensor reset and learn. Performs the relearn routine after replacing one or both NOx sensors on diesels with SCR. When: After NOx sensor replacement or after persistent emissions-related fault codes that point to the NOx sensor.
• High-voltage battery system diagnostics. Reads HV battery management module fault codes, cell-group voltages and pack-temperature data on supported hybrids and EVs. When: After an HV warning, hybrid system fault, or before purchase of a used hybrid or EV.
• Radar and camera (ADAS) calibration. Initiates calibration routines for ADAS sensors after windscreen replacement, sensor swap or related fault codes. When: After windscreen replacement on ADAS-equipped vehicles, after radar or camera replacement, or after dashboard ADAS warnings.

Specifications

Supported diagnostic protocols on this variant: OBD-II, CAN, CAN-FD, K-Line, KWP-2000.

The LR V4.0 will be delivered with software pre-installed, and 2 further vehicle makes can be downloaded free of charge.