OBD2 Power Adapter DANGEROUS? (Is it safe to use the OBD port for power?)
Summary
TLDREn este video, Alex, el Car Guy, explica si es seguro alimentar una cámara de registro (dash cam) usando el puerto OBD de su vehículo en lugar de cablearla directamente al interruptor del coche. A pesar de que algunos temen que podría dañar el sistema del vehículo, Alex desmiente los mitos y muestra el interior de un adaptador de alimentación OBD, explicando que solo se conectan pines para corriente positiva y negativa, sin interferir con la computadora del vehículo. Además, menciona que la mayoría de los automóviles tienen protección en forma de fusibles para prevenir daños. Finalmente, Alex invita a los espectadores a dejar sus preguntas en los comentarios y anuncia un futuro video más avanzado sobre el estándar J1962 que rige el puerto OBD2.
Takeaways
- 🔌 El video explica cómo alimentar una cámara de registro (dash cam) usando un cable OBD en lugar de cablearla directamente al fusible del vehículo.
- 📈 El video anterior sobre este tema ha tenido un gran éxito, con casi un millón de visitas.
- 🔍 Algunos espectadores se preguntan si es seguro usar el puerto OBD para alimentar una cámara de registro, y este video busca aclarar esas dudas.
- 🚗 Se menciona que hay más dispositivos disponibles que pueden conectarse al puerto OBD, como dispositivos de seguimiento de seguros.
- 🔒 Aunque los puertos OBD están diseñados originalmente para herramientas de diagnóstico, se han adaptado para otros usos.
- 🛠️ El vídeo proporciona una respuesta rápida de que, en general, no hay riesgos significativos al usar un cable OBD para alimentar una cámara de registro.
- 🔩 Se describe el interior de un adaptador de alimentación OBD, mostrando que solo se utilizan tres pines: dos para tierra y uno para alimentación positiva.
- ⚡ Se discute la protección contra cortocircuitos en el puerto OBD, con fuses incorporados en algunos vehículos para prevenir daños.
- 🤔 Aunque existe un riesgo teórico de que un objeto extraño cause un corto entre pines no conectados, este riesgo es similar al de usar cualquier otro dispositivo conectado al puerto OBD.
- 🔍 Se sugiere que la preocupación por daños en el sistema del vehículo debido a la conexión de dispositivos adicionales al puerto OBD es exagerada, y que los riesgos son comparables a los de usar un lector de códigos OBD estándar.
Q & A
¿Cómo se alimenta un cámara de registro (dash cam) usando un cable OBD en lugar de un cableado directo al fusible del vehículo?
-En el video se muestra cómo se puede alimentar una cámara de registro conectándola a través de un cable OBD en lugar de cablearla directamente al fusible del vehículo, lo cual es una alternativa popular y ha recibido una buena recepción.
¿Qué es un cable OBD y cómo funciona?
-Un cable OBD es un tipo de cable que se conecta a la interfaz OBD (On-Board Diagnostics) del vehículo y se utiliza para proporcionar alimentación a dispositivos como cámaras de registro.
¿Es seguro alimentar un dash cam usando el puerto OBD de un vehículo?
-El video aborda la preocupación de si es seguro usar el puerto OBD para alimentar un dash cam, explicando que, aunque algunos pueden estar preocupados, la mayoría de los dispositivos que se conectan a este puerto están diseñados para ser seguros.
¿Qué es la norma J1962 y cómo afecta a los cables OBD?
-La norma J1962 es un documento que controla el tamaño y la función de los pines de los conectores OBD. Especifica cómo deben funcionar y qué tamaño deben tener, pero deja algunos pines disponibles para que los fabricantes de vehículos los utilicen para propósitos especiales.
¿Cuáles son los riesgos potenciales de conectar un dispositivo aftermarket al puerto OBD de un vehículo?
-Uno de los riesgos potenciales mencionados es que, si no se conectan correctamente, los pines de un cable OBD pueden provocar un cortocircuito o daño en la computadora del vehículo. Sin embargo, se explica que estos riesgos son similares a los de conectar un lector de códigos OBD estándar y que la probabilidad es baja.
¿Qué dispositivos adicionales se pueden conectar al puerto OBD además de los lector de códigos?
-Además de los lector de códigos, se pueden conectar dispositivos como módulos de seguimiento de uso de vehículos por parte de compañías de seguros, o dispositivos para recopilar datos de rendimiento en entornos de carreras.
¿Cómo se protege el puerto OBD contra posibles daños por cortocircuitos?
-Algunos vehículos tienen fuses entre el puerto OBD y la batería para protegerlo contra cortocircuitos. Sin embargo, esta protección no es obligatoria según la norma J1962 y puede variar dependiendo del fabricante del vehículo.
¿Cuáles son las implicaciones de usar un puerto OBD para propósitos distintos a los diagnosticos?
-El video discute cómo el uso del puerto OBD para propósitos distintos a los diagnosticos, como alimentar un dash cam, ha ido más allá de su función original y cómo la industria ha adaptado este puerto para diferentes dispositivos.
¿Qué es un 'pin dummy' y cómo afecta el riesgo de daño al conectar dispositivos al puerto OBD?
-Un 'pin dummy' es un pin que no tiene ninguna función en el sistema del vehículo. Si un objeto extraño se conecta accidentalmente a un pin dummy, no causará daño ya que no está conectado a ningún circuito activo, reduciendo así el riesgo de daño al conectar dispositivos al puerto OBD.
¿Qué consejo final se ofrece en el video sobre el uso del puerto OBD para conectar dispositivos no diagnosticos?
-El video sugiere que, aunque existe un riesgo reducido de daño al conectar dispositivos no diagnosticos al puerto OBD, es importante entender cómo funcionan estos dispositivos y tomar precauciones antes de usarlos.
Outlines
🔌 Seguridad al usar el cable de alimentación OBD para el camrecorder
En este primer párrafo, se discute la seguridad de usar un cable de alimentación OBD para un camrecorder en lugar de cablearlo directamente al interruptor del vehículo. Se menciona un video anterior que tuvo un gran éxito y se ofrece un enlace en la descripción para aquellos que quieran verlo. El presentador, Alex, explica que, aunque algunos pueden estar preocupados por conectar algo que no es un dispositivo de diagnóstico al puerto OBD, hay más dispositivos en el mercado que utilizan este puerto. Se menciona que las compañías de seguros envían dispositivos OBD2 para monitorear el uso del vehículo y reducir el costo del seguro, lo que implica que el riesgo de dañar el vehículo es bajo. Se enfatiza que, aunque el puerto OBD fue diseñado para diagnósticos, su uso se ha expandido con dispositivos adicionales, y se aconseja entender cómo funcionan estos dispositivos antes de tomar decisiones sobre su uso.
🛠 Explorando el interior del adaptador de alimentación OBD
El presentador, Alex, continúa explicando cómo funciona el adaptador de alimentación OBD y qué componentes están conectados. Se menciona que el estándar J1962 controla el tamaño y las funciones de los pines del conector OBD, pero deja algunos pines libres para su uso por parte de los fabricantes. Al desmontar el adaptador, se observa que solo se utilizan tres pines: dos para tierra (pin 4 y pin 5) y uno para poder positivo (pin 16). Se destaca que el adaptador no interfiere con la computadora del vehículo, ya que solo se conecta directamente a la batería y al suelo. Además, se discute la protección incorporada en el vehículo, como el fusible entre la batería y el pin 16, que protege contra cortos. Se menciona que, aunque el estándar recomienda protección, no es obligatoria, por lo que la presencia de un fusible varía según el fabricante del vehículo.
⚠️ Riesgos y precauciones al usar el puerto OBD
En el tercer párrafo, Alex aborda los riesgos asociados con la conexión de dispositivos al puerto OBD, enfocándose en la posibilidad de que un objeto extraño cause un corto entre pines que no deberían estar conectados. Se explica que este riesgo es similar al que se corre al conectar un dispositivo de diagnóstico estándar, ya que ambos son fabricados y probados en fábricas. Sin embargo, se señala que la probabilidad de que un objeto extraño cause un corto es baja, ya que los pines no utilizados están diseñados para no interferir con los que sí se usan. Se sugiere que, aunque existe un riesgo mínimo, la única manera de evitar daños electrónicos en el vehículo es no conectar ningún dispositivo adicional al puerto OBD. Finalmente, se menciona que el puerto OBD está diseñado para su uso y que, en la vida del vehículo, es probable que se utilice en situaciones como inspecciones de emisión, lo que implica que su uso es inevitable en ciertos contextos.
Mindmap
Keywords
💡OBD (On-Board Diagnostics)
💡Cable OBD
💡Puerto OBD
💡Seguridad
💡J1962
💡Fusible
💡Microcontroladores
💡Protección de la batería
💡Pin
💡Detección de fallos
Highlights
视频展示了如何使用OBD电源线而非硬接线到车辆保险丝盒来供电行车记录仪。
视频获得了近百万观看,证明了其受欢迎程度。
视频提供了OBD电源适配器内部构造的详细分析。
解释了OBD端口的安全性,以及是否应该担心使用OBD端口供电。
介绍了OBD电源线连接到车辆OBD接口并供电给行车记录仪的过程。
讨论了市场上除了诊断工具外,越来越多设备使用OBD端口的现象。
举例说明保险公司如何使用OBD端口来监控车辆使用情况。
解释了OBD端口最初设计用于诊断,但现在也被用于其他目的。
强调了连接任何后市场设备到车辆都存在潜在风险。
展示了OBD电源适配器内部的开关和微控制器,以及它们如何工作。
说明了OBD适配器实际上只使用三个引脚:两个用于接地,一个用于供电。
讨论了车辆电路图,解释了OBD适配器如何与车辆的电源和接地连接。
指出了OBD连接器的J1962标准,以及它如何规定引脚的功能。
解释了车辆制造商如何根据J1962标准选择性地使用OBD引脚。
讨论了车辆制造商在OBD端口提供保护措施,如内置保险丝。
指出了即使有保护措施,也有可能因为制造过程中的失误导致引脚短路。
强调了即使是专业的OBD诊断工具,也存在同样的短路风险。
总结了OBD端口的用途已经从最初的诊断工具扩展到了其他设备。
预告了即将发布的更详细的视频,深入讲解OBD2端口和J1962标准。
Transcripts
on a prior video i showed you how i
power my dash cam using an obd power
cable instead of hard wiring it to the
fuse box of my vehicle and that video
has gotten a very positive reception
with almost a million views so if you
have not seen that video i'll put a link
to that video in the description in case
you want to check it out but a few
people were left wondering if it was
safe to power a dash cam using the obd
port of your vehicle on this video i'm
gonna show you what's inside of this obd
power adapter and we're gonna talk about
should you be afraid and should you be
worried about using the obd port for
power hi guys welcome back i am alex the
car guy and on this channel i review
cool car gadgets and other accessories
that i find for your vehicle so if those
are the kind of videos you like make
sure you subscribe by hitting the button
down below to see more videos like this
but now let's talk about the obd power
cable and i'm gonna give you a very
short answer and on the second part of
the video we're going to get a little
bit more into depth if you want to know
the technical aspects of how the obd
power cable works but let's talk about
the obd power cable this is going to be
connected to the vehicle obd interface
and that powers the dash cam now that
can potentially scare some people
because they're wondering hi i never
heard of somebody connecting something
to the obd port that is not a
diagnostics tool or that is not a code
reader all of a sudden you're connecting
a dash cam what is going on in fact i
even had some people put in the comments
this is gonna blow up your car this is
gonna kill your car's computer and the
quick and short answer to this is well
not really because we are now seeing
more devices that can be plugged into
the obd port instead of just an obd
scanner for example some insurance
companies if you call them up they'll
send you a little obd2 plug-in that you
can put in your car and with that they
can monitor how you're using your car
and potentially give you a lower price
in your insurance now think about it the
insurance company when looking at
anything that has to do with your
vehicle they're looking at risk and are
they going to send you a device that's
going to cost your car to break down
caution catch from fire or anything like
that they're probably considering that
risk very very small and therefore
they're saying here put this in your car
again this is the insurance company from
your car saying it's okay to plug in a
device into your obd port that is not a
diagnostics tool and some of us are
using the obd port to pull information
of the car for performance data perhaps
we are into racing the vehicle in a
professional close track environment and
we want to see real-time information
coming off the vehicle that's when we
can use one of these dongles so while
the obd port was originally designed for
diagnostics using an obd scan tool we
are now seeing that there are more
devices out there in the market that are
using the obd port for other purposes
but just because we are now using other
devices in the obd port than the
original intended scan tool does that
automatically make using the obd port
safe well i'll be very careful with
anybody that tells you it is a hundred
percent safe to plug this into your
vehicle anytime you're connecting
something into a car that is an
aftermarket device there is the
potential or something to go wrong if
you don't want to have that potential
risk never connect an aftermarket device
to your vehicle now anybody that tells
you this will 100 kill your car i would
also be wary of that advice because
there is a lot of factors and you want
to understand how these devices work
behind the scenes before you can make a
claim like that but let me show you
what's inside of the obd power cable
adapter so we can understand how it
functions how the obd port functions
what safety features are built in onto a
car to prevent this from damaging the
vehicle and more and starting with the
obd connector the size of it and the
pins each one what it does is controlled
by a document that we call the
j1962 standard and that document tells
the manufacturers this is how they
should work this is the size that we
want them to be and each pin should do
the following function and does that
mean that each one of these pins is
actually doing something well not really
the standard only covers certain pins
some pins are left available for the
manufacturer of a vehicle to use them
for some special purpose so this obd
adapter even though it has 16 pins may
not be needing or using all of them but
let's see what's inside of this bad boy
which i already took the liberty of
taking the screws apart and we can see
here that we have the switch that can
turn the different functionalities of
the adapter and then we have a little pc
where i'm going to pull this out right
here and we can see here that there is a
couple of microcontrollers a capacitor
but what i want to show you is that even
though i have 16 pins in the adapter if
you looked in between this plastic part
and the pc board you'll see that not all
the pins are being used we can see that
there's a pin right here being used and
a pin right here being used which are
the ones that are right smack in the
center which corresponds with these two
pins right here this one and this one
and if we keep going around here we can
see that there is another pin that is
being used and it's underneath here you
can see how it kind of comes out on this
end and that pin is all the way over
here number 16. so what does the two
pins are over here do and what does this
pin do right here well pin four and pin
five are providing a ground which is
negative and this right here 16 is
providing positive power so that is it
this connector is only tapping into
negative and positive power from the
vehicle every other pin is not connected
so just because i'm plugging this entire
connector you can see that the pins that
are really only being interfaced to the
car are a total of those three pins the
two for the ground and one for power and
here's where the phone begins this is
the schematic for the vehicle where i'm
using my obd power adapter which is only
using three pins it's using pin 16 for
positive and is using pin 4 and pin 5
for negative now if i look at the car
schematic pin 4 and pin 5 sure enough
they are negative because they go
straight to ground now if i look at pin
16 that goes directly to
my battery so am i at any point touching
the computer the car's computer not
really i'm going straight to the battery
and i'm going straight to ground so
anybody that tells you that this adapter
is interfacing to your computer does not
understand how to read schematics and
the other interesting thing is that the
document that controls the obd connector
the j1962 standard describes that pin 16
because it's providing power it should
have some kind of protection and if you
follow the schematic for my vehicle you
can see that yep there is some
protection they have put a fuse in
between the battery and pin 16
effectively protecting this against any
kind of short and this answers a common
question that i get regarding an obd
power adapter is this fuse protected
well the fuse protection is built onto
the car however if you look at the
standard it says recommend it it doesn't
say that it's mandatory so just because
chrysler decided to put a protection in
here does that mean that your car has a
protection that is really gonna depend
on the car manufacturer and i've seen
cases in electronics where there are
multiple fuses in line maybe a fuse on
the actual device and a fuse on the side
as providing power so you have a total
of two fuses but normally one fuse is
enough two good redundancy one is the
normal practice but earlier i mentioned
that this is not interfacing to the
computer and that is valid for this
adapter in its working configuration
because if you look at the adapter the
other pins are going to the computer for
example you have pin 7
pin 12 pin 2 p9 and pin 15
in some cases in this case because
they're using the 2.0 engine is there a
possibility that during the
manufacturing process a little solder
ball and solder is what we use to mount
the components onto a pc board can a
solder ball fall in between one of those
spins imagine if a large piece of metal
fell
in between 12 and seven and you got
completely unlucky that it landed on
those two pins and it got to you and you
plugged it into your car can it
potentially affect something it
definitely can because now we are
connecting two pins that are not meant
to be connected and having worked in the
industry for quite a bit of time i can
tell you that we have tests in process
and sometimes at the end of the line to
test that things like that does not
happen but even with all those tests
sometimes there are some things that
escape and that is just the nature of
the business and if you happen to be
that few very very small percentage that
that escaped and it got to you you could
potentially have two pins that are not
supposed to be connected connected but
let's look closer at the risk of two
pins being connected by accident at the
factory here again is where it's gonna
depend greatly on your vehicle because
the standard that controls this
connector does not specify all the pins
it leaves a lot of pins unused for the
manufacturer to use them if they wanted
to for example in this particular
schematic for chrysler you can see that
chrysler is not using pin one this is
not using pin 3 not using pin 6 so you
can see that they're hardly using the
pins on the obd connector if you were
happen to be unlucky enough that you got
a bad adapter where something is
shorting let's imagine a shorting pin 13
and 14. is it gonna do anything to my
vehicle not really because the vehicle
is not even using those pins same thing
if that potential piece of metal landed
in between 10 and 12 is it gonna damage
my vehicle the vehicle won't even know
because nothing is connected you have
what we call in the industry a dummy pin
one that doesn't do anything so the risk
is reduced because now you are looking
at that piece of metal has to land in
between one of the working pins and some
of the pins are actually pretty far from
each other so when you look at pin two
and pin four there is an empty space in
between pin three so whatever falls in
there has to be large enough where it
will cross all the way from pin two
all the way up to pin four and you can
see on here how far that is here's pin
one
two three four so you're talking a very
very long distance so you're talking
about having a very large piece of
foreign object debris inside of this
connector that escaped the factory so as
you can see the main danger of
connecting something to your obd port as
far as i can tell is gonna be two or
more pins being shorted out by a piece
of debris when they're not supposed to
be connected
but that same possibility of that same
potential short can occur on a normal
obv diagnostic tool this is a tool that
we connect as car mechanics to our cars
all the time so the same danger of
potentially shorting out something in an
obd power cable is the same danger of
connecting a standard tool to the device
of a vehicle both of them are being made
in factories both of them are being
tested in process both of them can
potentially have escapees escape out of
the all the quality checks and can
potentially make it to you and
potentially create a hazard on your side
so the only way to ensure that you never
damage your vehicle's electronics is
never to connect anything that's after
market never connect an obd device to
your vehicle but that's kind of
realistic because the obd port was
designed for us to use it it was
designed for us to connect into it and
in fact at some point in time your car
is going to throw a code and a mechanic
is going to have to connect an interface
to it in fact if you live in one of the
states that require a smog or some kind
of check like that the technician that's
checking your car is gonna connect a
very similar tool either wireless or
with a wire to your vehicle to check
that it's ready for smog so there is
gonna be some use of that port during
the life of the car whether you want it
or not so hopefully this video gave you
a little bit of background on how this
adapter works how the obd adapter came
to be how it is controlling the industry
and the different devices that are now
being plugged into an obd port it is not
really like a usb port where it was
meant for you to plug hundreds of things
in there it was originally only intended
for diagnostics tools and over time the
industry started to come up with other
devices to plug in there as well when
they realized hey if we only use the
pins for power then that's all we really
need and if you guys have any other
questions regarding the obd2 adapter
please put that in the comments down
below and stay tuned as i have a more
advanced video covering in detail the
obd2 port as described by the j1962
standard which is going to be of
interest to anybody who has an
engineering background or whether you
like to learn electronics or whether you
really wanted to know this in more
intimate detail to really feel
comfortable plugging it in and using it
or not plugging in anything to it and
not using it
you
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