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Question

How to diagnose EV on-board charger (OBC) thermal protection fault?

Answer

It identifies false or premature thermal shutdowns.

Explain

OBC thermal protection prevents overheating; faults disrupt charging. CHEPQ EV diagnostic tools monitor OBC temperature, thermal fuse status, and cooling system operation, detect faulty temperature sensors or cooling fans, and verify thermal protection logic. This ensures reliable charging without unnecessary shutdowns.

Related Diagnostic Guide

To explore this topic in a broader system-level diagnostic context:

Related Guide: EV/Hybrid High-Voltage System 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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