GAP IIDTool G4 Bluetooth Diagnostic Tool and Code Reader for Land Rover Vehicles | TFIIDBTG4

GAP IIDTool G4 Bluetooth Diagnostic Tool for Land Rover

The GAP IIDTool G4 Bluetooth diagnostic tool is one of the most advanced and widely trusted diagnostic interfaces available for modern Land Rover vehicles. Designed by GAP Diagnostics specifically for Land Rover applications, it allows you to read and clear fault codes, view live vehicle data and carry out advanced service, calibration and configuration functions using your compatible smartphone, tablet or computer.

Originally developed by GAP Diagnostics in Canada, the IIDTool has become one of the most widely used diagnostic tools for Land Rover vehicles worldwide.

Supporting both DoIP (Diagnostic over IP) and traditional CAN bus communication systems, the IIDTool G4 provides deep access to vehicle systems that previously required expensive workshop diagnostic equipment. It is widely used by Land Rover owners, enthusiasts and professional workshops for fault finding, maintenance and advanced vehicle configuration.

Why choose the GAP IIDTool G4?

• Advanced Bluetooth diagnostic interface for modern Land Rover vehicles
• Supports both DoIP and CAN bus vehicle communication systems
• Reads and clears fault codes across multiple vehicle systems
• Displays live vehicle sensor data and diagnostic values in real time
• Supports service functions, calibrations and manual activations where available
• Allows configuration and personalisation functions where supported
• Compact design that can be stored in the vehicle for use whenever required

Key features

• Bluetooth connectivity for use with compatible iOS and Android devices
• DoIP and CAN bus support for broader Land Rover vehicle coverage
• Access to engine, transmission, ABS, air suspension, airbag and body systems
• Fault code reading and clearing
• Live sensor data streaming and graphing
• Actuator tests and manual outputs where supported
• Vehicle personalisation and CCF coding functions where supported
• Fast, convenient app-based operation without the need for a bulky scan tool

What you can do with the IIDTool G4

• Read and clear diagnostic fault codes across vehicle systems
• View live sensor data and diagnostic values in real time
• Perform service routines such as service interval reset
• Carry out actuator tests and manual component activations
• Perform suspension calibration and related procedures where supported
• Configure and personalise vehicle settings through CCF editing where supported

Diagnose common Land Rover problems

The IIDTool G4 is widely used by Land Rover owners and workshops to diagnose a range of common vehicle faults including:

• Air suspension faults and height calibration issues
• ABS and traction control warning lights
• Engine management system faults
• Airbag warning lights
• Transmission fault messages
• Steering angle sensor faults
• Battery monitoring and vehicle system communication faults

By reading detailed fault codes and live system data, the IIDTool helps identify the cause of these issues quickly and accurately.

Suitable vehicles

The IIDTool G4 is primarily designed for modern Land Rover vehicles from approximately 2017 onwards that use DoIP diagnostics, while also supporting a number of earlier compatible vehicles.

• Defender (L663) 2020+
• Discovery 3 (L319) 2004–2009
• Discovery 4 (L319) 2010+ (adapter or OBD modification required)
• Discovery 5 (L462) 2017+
• Discovery Sport (L550) 2015–2019 (adapter or OBD modification required)
• Discovery Sport (L550) 2020+
• Freelander 2 (L359) 2008–2015
• Range Rover (L322) 2010–2012 (adapter or OBD modification required)
• Range Rover (L405) 2014–2016 (adapter or OBD modification required)
• Range Rover (L405) 2017+
• Range Rover Sport (L320) 2005–2013
• Range Rover Sport (L494) 2014–2016 (adapter or OBD modification required)
• Range Rover Sport (L494) 2017+
• Range Rover Sport (L461) 2023+
• Range Rover Evoque (L538) 2011–2019 (adapter or OBD modification required)
• Range Rover Evoque (L551) 2019+
• Range Rover Velar (L560) 2018+

This makes the IIDTool G4 particularly useful for newer vehicles such as Defender L663, Discovery 5, Range Rover Velar, later Range Rover, Range Rover Sport and later Range Rover Evoque models.

Please check compatibility carefully for your specific vehicle and model year before purchasing.

Important compatibility note

The IIDTool G4 does not support the following vehicles:

• Range Rover L322 (2002–2009)
• Defender (L316) 2007–2015

For these vehicles the GAP IIDTool G3 is usually the suitable option.

VIN lock explained

The IIDTool G4 uses two levels of functionality:

• Standard diagnostic functions such as reading and clearing fault codes are VIN lock free and can be used on multiple vehicles.
• Advanced programming functions such as ECU programming and configuration changes become VIN locked to one vehicle when first used.

Advanced programming functions (VIN locked)

• ECU software updates and module programming
• Vehicle configuration and personalisation (CCF editing)
• Suspension height calibration and adjustment
• Backup and restore of original CCF values
• Backup and restore of suspension height settings
• Multiple personalised suspension height profiles

Device compatibility

The IIDTool G4 works with the IIDControl app on compatible Apple iOS and Android devices, with additional support for computers via IIDUpdater.

• Compatible with iOS and Android using the IIDControl mobile app
• PC and Mac supported via the IIDUpdater software
• Android devices should support Bluetooth v4.2 or newer
• Android 8 or later recommended for reliable performance

What makes the IIDTool so popular?

Unlike many generic code readers, the GAP IIDTool is built specifically for Land Rover applications. That means deeper vehicle communication, broader system access and more useful functions for owners who want more than just basic engine fault code reading. It is a popular choice for anyone maintaining their own vehicle properly, as well as workshops dealing with common Land Rover faults, service procedures and advanced configuration work.

Originally developed for specialist Land Rover workshops, the IIDTool has become one of the most widely recommended diagnostic tools within the Land Rover enthusiast community.

Before you buy

• Please confirm that your vehicle is within the supported compatibility range
• If unsure whether a specific function is supported for your vehicle, please check before purchasing
• Functions available may vary depending on vehicle model, year and specification
• Once activated on a vehicle, diagnostic tools like this are generally not eligible for return unless faulty

What is included

• 1 x GAP IIDTool G4 Bluetooth diagnostic interface
• Access to the IIDControl diagnostic app

If you need a powerful and proven diagnostic tool for a compatible modern Land Rover, the GAP IIDTool G4 is an excellent choice for fault finding, live data monitoring, service functions and advanced vehicle configuration in one compact Bluetooth unit.