Question
How does CAN bus signal reflection affect EV charging system communication?
Answer
Reflections cause message corruption, leading to interrupted charging or incorrect state-of-charge readings.
Explain
EV charging relies on CAN communication between the OBC (on-board charger) and BMS. CHEPQ oscilloscopes detect signal reflections (seen as voltage spikes >5V on CAN-H) caused by mismatched termination resistors, guiding technicians to replace faulty OBC connectors—resolving “charging paused” errors.
Related Diagnostic Guide
To explore this topic in a broader system-level diagnostic context:
Related Guide: CAN & LIN Vehicle Network Diagnostics
Recommended Diagnostic Solutions
To apply the diagnostic concepts discussed above in real-world scenarios, explore our full range of professional automotive diagnostic tools. These solutions are designed to support battery testing, system diagnostics, and data analysis for modern vehicles and workshop environments.
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