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Discussion Starter #1
Hi everyone,

2 days ago, I plugged in my sct Tuner and suddenly, the port was not powering it as no lights were blinking on the device. I connected the device to the laptop using a USB cable. It came on and I successfully updated it to the latest firmware release. I tested all the fuses inside the car and under the hood expect for the very big ones under the hood because their functions were irrelevant as I read in the car manual.

Any ideas please?!
 

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Perhaps one of the pins on the car-side OBD port is bent or not making sufficient contact. I assume you wiggled it while trying to get the SCT to power on. If you have a buddy with an OBD reader, see if that simple test works. Then, work your way to the SCt.
 

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Discussion Starter #3
Perhaps one of the pins on the car-side OBD port is bent or not making sufficient contact. I assume you wiggled it while trying to get the SCT to power on. If you have a buddy with an OBD reader, see if that simple test works. Then, work your way to the SCt.
None of my friends has one but I need to try that because I just tried my tuner in a 2013 Hyundai and then a Toyota Camry. Same thing. No power. The idea of getting power from the USB port and not the car doesn't make any sense to me.

Do you know which pins should I test for power on the obd port itself?
 

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Why not use power from the car to power it up. Even most OE comm boxes are powered up this way. It's done this way in case computer looses power so it doesn't blank ECM like when programming for most ECM's
 

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Discussion Starter #5
I can do that and I thought about it but I am afraid of one thing. while flashing the ECM with the tune file, the car turns off and then back on at a certain point and that may put me in a worse situation. I might be wrong but didn't dare to risk it.

And it is also the idea of a $500 device that is not working the way it should.

What do you think?
 

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Why not use power from the car to power it up. Even most OE comm boxes are powered up this way. It's done this way in case computer looses power so it doesn't blank ECM like when programming for most ECM's
Don't use the USB to power it up in the car. Double check all the fuses in the car. Does anything else in the car not work, like the cigarette lighter port? If they're all good, call SCT; they'll get it figured out. Hopefully they can just remote in to your computer and fix it that way.


Sent from AutoGuide.com App
 

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Discussion Starter #8
Don't use the USB to power it up in the car. Double check all the fuses in the car. Does anything else in the car not work, like the cigarette lighter port? If they're all good, call SCT; they'll get it figured out. Hopefully they can just remote in to your computer and fix it that way.


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I checked all fuses, car cig lighter is fine. I called them yesterday and they asked to check the voltage between pin 4 and 13. I did today and the voltmeter read 2.5v.

I am calling them today again for sure but it's always good to learn from people's experience.
 

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Discussion Starter #9
check fuse 20 in smart junction box. should be a 15a
i did man. it is fine but i changed it anyway just to be sure the fuse is not the problem
 

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None of my friends has one but I need to try that because I just tried my tuner in a 2013 Hyundai and then a Toyota Camry. Same thing. No power. The idea of getting power from the USB port and not the car doesn't make any sense to me.

Do you know which pins should I test for power on the obd port itself?
If you tried the tuner in other cars and had no power in them then it seems obvious to me that the cable, or power pin in the plug on the cable, is bad or bent or some such issue.

Going to have to send it back to SCT for repair.

I sure wouldn't try tuning with it until the cable issue is fixed.
 

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Discussion Starter #11
If you tried the tuner in other cars and had no power in them then it seems obvious to me that the cable, or power pin in the plug on the cable, is bad or bent or some such issue.

Going to have to send it back to SCT for repair.

I sure wouldn't try tuning with it until the cable issue is fixed.
Me neither. I talked to SCT a few mins ago and they asked me to send it back to them.
 

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I have read on other forums to make sure you have a battery charger hooked up to your car when reflashing and not to turn on any lights/radios etc. Evidently tuners can be succeptable to power flucuations.....

+1 on the tuner being the issue, good luck
 

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If you tried the tuner in other cars and had no power in them then it seems obvious to me that the cable, or power pin in the plug on the cable, is bad or bent or some such issue.

Going to have to send it back to SCT for repair.

I sure wouldn't try tuning with it until the cable issue is fixed.
Solid solution. Hope you got it fixed.
 

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Discussion Starter #14
My tuner is finally working again. I tested all fuses, updated the device which was being power by the pc's usb normally and still not through the obd port. I test the obd port pins voltages. All came out fine. I finally tried to connect it to my friends' cars and the tuner also didn't work so it was now clear the tuner was the issue. I sent it back to sct and they change it for me. My car is re-tuned and feels awesome again.

Thanks everyone for the help.
 
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