Choose a system below to browse 200 diagnostic guides. Start with the problem you recognise. You do not need to know which module is faulty. The guides explain what to record and what the test results may mean.
EV, Body Electronics and Instrument Fault Guides
Charging equipment and session problems, Battery measurements and assessment records, Heating, ventilation and climate controls, Lighting circuits and replacement lamps, Instrument displays and vehicle information.
Browse EV, body and instrument guides
Sensors, Starting and Electrical Testing Guides
Sensor measurements and interpretation, Starting requests and restart symptoms, Power distribution and protective circuits, Emissions controls and monitored conditions, Electrical test methods and their limits.
Browse sensor, starting and testing guides
Networks, Software and Commercial Vehicle Guides
Vehicle-network architecture and evidence, Software operations and configuration, Infotainment, reception and connectivity, Water exposure and recurring corrosion, Vans, conversions and working vehicles.
Browse network, software and van guides
ADAS, Transmission and Specialist Repair Guides
Driver assistance and calibration evidence, Transmission data and repair scope, EV thermal management and verification, Choosing and preparing module repair, Service history and post-repair evidence.
Browse ADAS, transmission and repair guides
Existing collections
- Vehicle electrical faults by symptom and system
- Advanced vehicle electronics guides
- Automotive electronics repair library
Arrange an assessment
Use the vehicle and module finder to prepare your details, or contact AXION about the appropriate route. Workshop visits are by appointment in Didcot. UK-wide postal enquiries are welcome for suitable removed modules; confirm suitability before dispatch.