Professional CAN Bus Toolkit
Troubleshoot faults faster. Design networks with confidence. Whether you're diagnosing a bus-off condition or planning a new installation, these tools get you there.
Fix My Bus
Bus is down, you're under pressure, and you don't know where to start.
Guided wizard walks you through systematic fault isolation based on your symptoms.
Find root cause in ~10 minutes instead of hours of guessing.
Message Decoder
Staring at raw hex data trying to figure out what the messages mean.
Paste CAN frames and instantly decode J1939 PGNs and OBD-II PIDs.
Understand what your network is saying without digging through spec sheets.
J1939 Database
Need to look up a PGN, SPN, or fault code but the spec is 1000+ pages.
Searchable database of J1939 parameter groups, suspect parameters, and DTCs.
Find what you need in seconds instead of digging through PDF specs.
Bus Load Calculator
Adding messages to the network and not sure if it can handle the load.
Enter your message IDs and rates to calculate total bus utilization.
Know exactly how much headroom you have before hitting capacity.
Data Analyzer
You have a CAN log file but no easy way to find what went wrong.
Import logs, filter by ID, search patterns, and isolate fault events.
Turn hours of scrolling into minutes of targeted analysis.
Cable Calculator
Planning a new installation and need to know max cable length.
Enter baud rate and node count to calculate safe cable distances.
Design networks that work reliably the first time.
Plus 10 more tools
A visual reference library of the most common CAN bus faults, each with annotated oscilloscope waveforms. Use it to match what you see on your scope to known fault signatures.
CAN bus requires exactly two 120Ω termination resistors—one at each physical end of the bus. This tool guides you through measuring the resistance and interpreting results to diagnose missing, extra, or incorrect termination.
Check the DC voltage levels on your CAN bus to identify open wires, shorts, or transceiver failures. This tool shows expected values and helps interpret abnormal readings.
CAN transceivers can fail silently, dragging down the entire bus. This test helps you identify a failed transceiver by measuring impedance characteristics at each node.
Learn to interpret CAN bus waveforms on an oscilloscope. This interactive tool shows what healthy and faulty signals look like, helping you correlate scope readings to specific fault conditions.
Watch how multiple CAN nodes compete for bus access through the arbitration process. This animation breaks down the bit-by-bit comparison that determines message priority.
Understand how a CAN bit is divided into time segments and why sample point matters. Adjust timing parameters interactively to see their effect on reliable communication.
Explore the three error states defined by the CAN protocol: Error-Active, Error-Passive, and Bus-Off. Understand how error counters drive state transitions and what each state means for your network.
Create a visual diagram of your CAN bus network showing nodes, stub lengths, and termination points. Export for documentation or use during troubleshooting.
Build custom signal databases for your specific CAN messages. Define message IDs, signals, scaling factors, and units. Export as DBC files for use with other tools.
Pro Access
- All 15 diagnostic tools
- Fix My Bus troubleshooting wizard
- J1939 & OBD-II message decoder
- Unlimited use, cancel anytime
One stuck truck can cost $500+/hour in downtime. These tools pay for themselves the first time you use them.