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Question

How to test faulty on-board charger (OBC) in plug-in hybrid vehicles?

Answer

Monitor charger output voltage and test AC input current.

Explain

A faulty OBC prevents battery charging. CHEPQ tools measure OBC output voltage (DC) and AC input current—replacing the OBC restores charging functionality.

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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