USB C Ports Acting Strange

Steve181

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Hilton Head Island, SC
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Air Pure, Lexus RX
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ML46XAMX
I am attemting to get a 5 V signal from my 2025 Lucid Air Pure's USB C ports (front or rear). The ports work fine when a phone is plugged in to charge.

BUT, when I plug in a USB C plug there is no voltage on the 5 V lead. I am using the 5.1 k pull down resistors on the CC1 and CC2 leads, but that does nothing.
I have tried adding 1 and 2 ma loads (assuming that the Lucid is load sensing) and that does nothing.

I have tried the my setiup on another USB C supply, including pd, and it works perfectly.

What is the protocol for getting 5v (at very low current) from the cars USB C ports??
 
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