Charging interfaces can use separate signals for connection information and charge control. One recognised condition does not prove that the other part of the exchange is correct.
Interpreting the evidence
Identify the connector standard and vehicle implementation before interpreting data. Preserve charger and vehicle messages together so a technician can see whether connection recognition, permission or another stage failed. Approved test equipment is needed for electrical investigation.
Keep this evidence
Include the cable type, charging mode and whether the connector locks normally.
Do not apply resistance or voltage values from a different connector standard. This guide is not a live charging-pin test procedure.
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Technical background from Texas Instruments. The referenced design explains the principle; the vehicle-specific procedure determines the repair.
Related reading — CCS power-line communication can fail before DC charging begins. Browse all vehicle-electronics diagnostic notes or return to the repair library.