Thanks Phil, I've found it now, in 8.5 of my UK manual, as you said, indexed under 'I' for if.....
Bonkers!
Battery Reset & Dead Battery (HEV)
New 2025 Tucson HEV.Battery dead several times during first week of ownership. Mechanical key and reset button used successfully. ****Noted that B30 ADAS PRK 99910-P0400 unit located under the floor of the cargo area has a visible fan on top of the unit that runs continuously, 24/7, have verified at all hours without fob or digital key near me with flashlight through window. This can’t be normal, and must be significant drain over xx period. Waiting on dealer.
Anyone else note or troubleshoot this fan m/ unit?
Anyone else note or troubleshoot this fan m/ unit?
- PhilHornby
- Posts: 548
- Joined: Fri Mar 03, 2023 6:04 pm
- Location: North Devon
The New Tucson Hybrid seems to have come with a new set of issues
...
I don't recognise your description of the unit at all, but I found a Part # match for: 99910P0400, which describes it as the "UNIT ASSY-ADAS PARKING ECU" (With a price tag of $14469, which seems a tad expensive
).
I'm not entirely sure what it is - "Parking ECU" seems to indicate one thing, but "ADAS" is described as :-

I don't recognise your description of the unit at all, but I found a Part # match for: 99910P0400, which describes it as the "UNIT ASSY-ADAS PARKING ECU" (With a price tag of $14469, which seems a tad expensive

I'm not entirely sure what it is - "Parking ECU" seems to indicate one thing, but "ADAS" is described as :-
If it's all still operating, when the car is locked up and asleep, the 12V battery is not going to last very long at all.Advanced Driver Assistance System (ADAS) uses automated sensing technology with radars, sensors and cameras to detect obstacles on the road & respond with countermeasures for impact avoidance.
N Line S Hybrid (HEV).
23 plate - built Nov '22
23 plate - built Nov '22
- PhilHornby
- Posts: 548
- Joined: Fri Mar 03, 2023 6:04 pm
- Location: North Devon
- PhilHornby
- Posts: 548
- Joined: Fri Mar 03, 2023 6:04 pm
- Location: North Devon
Without meaning to be unkind, ’Speedbump’, there are some/several differences between those Tucson models sold in North America and their ‘equivalent’ cousins available in the European market.
I would suggest that you are more likely to attract informed responses in the Hyundai forums relating to the American market.
Hybrid in Ultimate trim - ordered 12/05/23 - Collected 07/06/23
Herts/Essex but often Spain
Herts/Essex but often Spain
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