Automotive CAN Bus Networks - One Day (£200 per delegate)

Topics

Introduction to CAN Bus Systems: Purpose and structure of in-vehicle networks – CAN Bus architecture and communication flow – Key terminology: arbitration, identifiers, message framing
Network Types and Configuration: High-speed vs. low-speed CAN networks – Typical vehicle applications and data priorities – Role of gateway modules and multi-network integration
Diagnostic Equipment and Tools: Using multimeters for network voltage testing – Scan tool communication and network error reporting – Oscilloscope waveform analysis and CAN Bus decoding – Introduction to CAN Analysers and message tracing
Interpreting Fault Codes and Flowcharts: Understanding U-codes and communication-related DTCs – Practical examples of network fault isolation
Electrical Fault Diagnosis Techniques: Identifying open circuits, shorts, and voltage drops – Diagnosing interference and CAN line noise – Recognising module communication faults and termination issues
Network Topology and OEM Information: Reading wiring diagrams – Analysing network layouts and module locations – Mapping and verifying physical network structures
Real-World Diagnostic Strategies: Troubleshooting intermittent network issues – Diagnosing no-communication faults – Case-based exercises for applied diagnostics

Course Summary

As part of the vehicle diagnostics training series, this one-day Automotive CAN Bus and Network Systems course delivers a focused exploration of vehicle communication protocols and practical diagnostic strategies. Designed for technicians working with increasingly complex vehicle electronics, this course builds a strong foundation in network architecture, ECU communication, and fault isolation.
Delegates will examine the structure and operation of CAN Bus systems, including message arbitration, identifiers, bit timing, and bus termination. Emphasis is placed on distinguishing high-speed and low-speed networks and understanding the role of gateway modules in cross-network communication.
Hands-on activities develop confidence in the use of essential diagnostic tools, including multimeters, scan tools, oscilloscopes, and CAN Bus analysers. Technicians will interpret U-codes, communication-related DTCs, and manufacturer-specific fault strategies using live data and diagnostic flowcharts.
The course includes instruction on reading network topologies from wiring diagrams and applying this knowledge to detect open circuits, shorts, interference, and no-communication conditions. Delegates will also explore real-world scenarios involving intermittent communication faults and failed module detection.
With a strong emphasis on practical application, this course equips participants with diagnostic strategies to accurately troubleshoot in-vehicle network systems and reduce unnecessary part replacement. It is ideal for technicians, diagnostic specialists, and advanced apprentices looking to expand their understanding of automotive communication networks and CAN Bus technology.
​​On completion, you will receive a certificate of attendance which can be used towards Continuing Professional Development (CPD) credits.

All courses designed and taught exclusively by Graham Stoakes AAE MIMI MSET QTLS

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Requirements

There are no formal entry requirements for this course, however, you should currently be working in the automotive industry as a vehicle technician or similar. The attendance of the Automotive Electrical Testing & Diagnosis course prior to undertaking this training will reinforce concepts used in scan tool operation.

This course is recommended for progression onto further diagnostic training.
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This course is a mixture of theory and practical and will require suitable clothing for conducting workshop activities. ​Safety boots are required for all technical work shop based activities. You will be unable to participate in the course if you do not wear the appropriate PPE.

We reserve the right to exclude a candidate who we suspect is under the influence of alcohol or drugs (the candidate may also need to make alternative arrangements for onward journeys).