Front USB-C Charging Port Dead

Discussion in 'Gen 5 Prius Care, Maintenance and Troubleshooting' started by Dyjital, Apr 23, 2026 at 10:41 AM.

  1. Dyjital

    Dyjital Member

    Joined:
    Apr 5, 2017
    90
    63
    0
    Location:
    Oregon
    Vehicle:
    2023 Prius
    Model:
    XLE AWD-e
    since the search is not working...

    My front USB-C port for charging has died. Yup, it's not working.

    What have I done? -
    Checked both USB fuses in front driver kick panel. Both 7.5A and 10A fuses are good..

    USB-C for radio data is good and works - use this vs Bt/WiFi for phone as my cars shit wifi connection fails randomly and Toyota won't admit it.

    USB-C's in the center console are working properly. Can charge/connect to airpods/phone.

    12V power outlet (Cig) is working properly - powers dash cam

    (Considering AllData 1 month sub but figured this would be the first step)

    Thoughts on where to go from here? Without wiring diagram I'm doing a shot in the dark here.
    FWIW: I'd consider myself a 9/10 on car knowledge but simple and stupid stuff like this just stymies me.

    Is this component a common fail? Next step is to check power at the back of the USB-C adapter and verify its getting power but that's something I need more time for than my drive into work.

    Thoughts?


    Edit:
    Additional information... maybe related?
    Had vehicle into shop for sideswiping a deer, made me wonder if it's not tied to the OBDII port fuse (haven't checked), maybe they tried to use a memory keep alive device and plugged it in there and during their process it overloaded the circuit.

    In process of getting repair manual to do some wiring trace and see what surfaces (since I'm behind a keyboard at work).
     
    #1 Dyjital, Apr 23, 2026 at 10:41 AM
    Last edited: Apr 23, 2026 at 11:21 AM
  2. Dyjital

    Dyjital Member

    Joined:
    Apr 5, 2017
    90
    63
    0
    Location:
    Oregon
    Vehicle:
    2023 Prius
    Model:
    XLE AWD-e
    I'm keying into this one:
    upload_2026-4-23_8-40-4.png

    Due to the grounding location being "Right side of Dash" vs the other that says "Left side of center console".

    States there is a 15A fuse somewhere that's protecting it... but that's the socket, not the USB-C... so this fails the sniff test. No 15A coming out of USB-C.

    Back to drawing board and isolating....
     
  3. VelvetFoot

    VelvetFoot Senior Member

    Joined:
    Sep 17, 2025
    1,284
    502
    0
    Location:
    New York State
    Vehicle:
    2026 Prius
    Model:
    LE
    Following...
    Also, good luck.
     
  4. VelvetFoot

    VelvetFoot Senior Member

    Joined:
    Sep 17, 2025
    1,284
    502
    0
    Location:
    New York State
    Vehicle:
    2026 Prius
    Model:
    LE
  5. Dyjital

    Dyjital Member

    Joined:
    Apr 5, 2017
    90
    63
    0
    Location:
    Oregon
    Vehicle:
    2023 Prius
    Model:
    XLE AWD-e
    Both of the listed fuses were/are good.

    You'll notice the 15A fuse in blue above that shows the 'cig', that's my power port on the far right of this panel. That port is working properly. I can eliminate that circuit as an issue.

    upload_2026-4-23_9-16-26.png


    I started there which lead me to the 10A and 7.5A USB fused circuits. At that point I needed more information to see if there was a shared connection because of the power ports:

    Under radio: (left to right)
    Data - works
    Power - no workie
    Power Port (Cig) - works

    Under armrest:
    All work as intended.

    So I either have:
    A: a bad USB-C port at the dash location
    or
    B: another shared fuse with that port and something else that I'm not noticing.

    Using the Mitchell1 wiring diagram I purchased access to is vague as to what fuse powers exactly what usb-c outlet. There is not a direct connection between the 7.5A and 10A outlets.


    upload_2026-4-23_9-11-24.png

    Center port will need to be removed, wiring color examined because..

    upload_2026-4-23_9-8-51.png


    I'll need to see if this is the color of the wiring at this plug. If it is not, then I have to find what this particular port is called within the wiring diagram.

    I am suspecting the 7.5A is the line I'm wanting to target as it's a single USB-C outlet vs the dual at the arm rest being 10A. I'll diagnose power this evening and finish reporting the findings.
     

    Attached Files:

    #5 Dyjital, Apr 23, 2026 at 12:10 PM
    Last edited: Apr 23, 2026 at 12:19 PM
  6. Dyjital

    Dyjital Member

    Joined:
    Apr 5, 2017
    90
    63
    0
    Location:
    Oregon
    Vehicle:
    2023 Prius
    Model:
    XLE AWD-e
    Ok @VelvetFoot

    Took the unit out, inspected the color of the wire and it showed that I have a..

    Purple with blue stripe. Absolutely NOT the blue wire I was looking for.
    IMG_1598.jpeg IMG_1599.jpeg


    Hmmm. So I popped the cover off the plug and did a voltage test on it.
    IMG_1600.jpeg
    IMG_1601.jpeg
    I’m getting 11.6V. So there is power to the plug.
    Hmm I says.

    plug the USB-C port back into the harness. Light comes on.
    Now wait a hairy second.
    IMG_1602.jpeg

    Plug my phone into said USB cable. Now it’s charging.

    I blew out the usb plug and inspected everything. I can’t find anything wrong with the 12-5v adapter on the circuit board, plugs etc.

    Maybe dust in the connector?
    image.jpg

    Either way, here we are with a fixed outlet.

    For reference: the PN on the back of the plug:

    image.jpg
     
    VelvetFoot and mingc like this.
  7. VelvetFoot

    VelvetFoot Senior Member

    Joined:
    Sep 17, 2025
    1,284
    502
    0
    Location:
    New York State
    Vehicle:
    2026 Prius
    Model:
    LE
    Excellent. I’m reminded of the old usb plugs. The c s are more rugged but still…..

    Perhaps some internal circuit protection that needed a power cycle to reset? You’d think it gets that at every startup.

    something to store away in the memory bank.

    I like the dust/oxidation theory.