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Smart Entry & Start System Check

Discussion in '3rd Gen. Tacomas (2016-2023)' started by XenoTaco, Feb 2, 2024.

  1. Feb 2, 2024 at 2:17 PM
    #1
    XenoTaco

    XenoTaco [OP] New Member

    Joined:
    Feb 2, 2024
    Member:
    #443007
    Messages:
    2
    Gender:
    Male
    First Name:
    Francois
    Vehicle:
    2021 Gen 3 TRD Sport Tacoma
    Light bar, level kit.
    Hey everyone, I've been troubleshooting this issue Smart Entry & Start System Check for 4 days now, with no luck.

    I installed a new hidden lightbar on my Gen 3 TRD Sport Tacoma and the wiring harness that comes with it but didn't get to the point of connecting the lightbar to the harness it came with. The lightbar harness has a built-in relay and fuse. I made the mistake of loosening the wiring harness nut and placing my lightbar positive terminal on top of the wiring harness and tightened it back down, instead of just installing it to the same post that it's on then securing with a separate fastener. I ran everything through the rubber grommet through the firewall, but I had to make a hole to fit the connection through, which I may have nicked a wire while making a hole with a knife but I can't feel any noticeable damage.

    My dash displays the error, I try to start it truck I hear a click and my cluster+screen resets me back to the start vehicle with keyfob screen.

    Things I've done:
    Immediately removed the lightbar switch from the battery
    Charged battery until it was reading 12.8-13V off a multi-meter
    Disconnected both the battery and ECU fuse for 30+ mins
    Did a combination of unlocking and locking the truck while I was outside, inside, doors open and closed
    Holding the start button for 10 seconds without my foot on the break, with my foot on the break
    Using OEM remote start which gives me an "E1" error and to contact the dealership
    Tried jumping it with another vehicle
    Tried both keyfobs which are functioning fine
    Holding fob up to the start switch to try starting it that way
    Checked some fuses here and there but I'm not sure which ones I would need to pull to check, I did check the ignition fuse and tested it with a battery to see if it clicks and it did.

    My guess is that I confused the system with the new relay and fuse by introducing something that could alter the expected voltage the system is getting and locked myself out somehow. Any suggestions or insights would be beyond useful and I appreciate the time anyone gives to answering. Worst case scenario I cut something and I'll have to pay the price and bring it in somewhere lol.

    -Cheers!
     

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