OBD-II Data Link Connector (DLC)
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- Опубликовано: 7 сен 2024
- OBD-II Data Link Connector (DLC)
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Describes the OBD2 connector also called the DLC, what each PIN does, and a brief wiring explanation.(note: the following is NOT a sales pitch. We allow all schools and training institutions to use our software free of charge, so long as it is not sold to others. You're encouraged to download our free automotive simulation software for more information.
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The subject of ECM ground is extremely important. Lots of issues are completely related to sensor ground issues, and not the component themselves. THanks for participating. I enjoy your questions.
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The CAN network may talk to a slower (LIN) network by means of a "Gateway". Gateways are devices that match two unequal speed networks together. The gateway circuit may be, and usually is, inside another module like the instrument cluster module. Makes sense?
Thank you, feel FREE to browse our more than 450 videos on this YT channel. We also have our publication in printed books and e-books on Amazon, Google-Play, Kindle and wherever books are sold. Thanks for posting.
@accentexit No, thanks you for letting us know. All we ask is that folks post and participate. Thank you again.
Good question... Your model is probably a Non-CAN scanner. CAN became universal in 2007 so yes, you'd probably have to replace it. Too bad. Thanks for posting.
Wow... This is a very smart & deep comment, thanks. A reminder, I do have an "Automotive Networks" book, which goes deep into the subject.
1st Question: Yes, all networks are connected as NODES, usually in a start topology.
2nd: DLC you can check all those, plus the network itself.
3rd: Power, Gnd & 5 volt reference (5V = ECM alive)
4th: Only 1 protocol per network. LIN is slow (seat, A/C, etc), CAN is fast (ECM, TCM, BCM)
CAN is also being slowly replaced by a faster protocol. Thanks.
@oobuc5 Great to hear that and that's why we do these videos. Our chance to give back to the community. All we ask is that you post and participate. Thanks...
Nc Full infos, Lods
Solid, I got the power infos I Need
Thank you very Much
God Bless
Happy 2023
Thank you for the wonderful job you are doing may God bless you and give you more knowledge.
You make a good point. The DLC is an output point and doesn't provide anything in particular. It is a source for testing. The ECM gets Ground, then through a circuit, also provides a filtered "sensor Gound". The only reason it's also on the DLC is because the developers of OBD-2 "CARB" though it would be nice to have for "TESTING" purposes. Chassis Gnd is often a source of trouble at the ECM. Sensor Gnd on the DLC is a fast way to determine if ECM is grounded properly. I've written a lot on it.
Thanks for the ADP training, it helps me a lot!!!
You're asking multiple questions in one. With reference to ground you should never get more than 100mV with engine running and 300mV with engine cranking. The other pins depend on the COMM protocol being used.
I suggest my book "Automotive Vehicle Networks" available where books are sold including amazon. Thanks for posting.
The music really helped
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That's called bi-directional control. It is part of OBD-2 OEM, but the issue is where to get he commands.
1) DLC has no connection to gateway. Gateway receives CAN-high/low and LIN wires and matches unequal speed networks together.
2) Sensor GND feeds the sensors through the ECM & Chassis GND is just that. Sensor GND is a perfect indicator of how well ECM is grounded.
3) Yes, CAN-high/low is linked to DLC. THe topology (star, token ring, etc) is really irrelevant. Regardless of how the CAN network is connected, two CAN wires will always reach the DLC from where you can do lots of diagnostics.
Hi. Excellent video. Enjoyed it a lot. I also play similar games and like them. Yours seems a little bit different though. Anyways, keep it up. Thanks a lot!
no fluff, just the stuff you need!
These videos are great! Everyone of them!
like i said before , you guys are the best!.....jb
@oobuc5 Thank you. All we ask is that you participate and post....
Hi
What are the parameter value for testing other pins like 2,6,7,14,15 to signal ground?
@somethinextra Thank you. We only ask that folks keep posting and participating...
i know its an old video but still can someone please help me identify which pins are the TEN and GND pleaaaaaaseeee
This post is relevant today as it was when I posted it. Watch the video and count from #1. #16 is the power pin.
Better yet, get the Ebook with all you'll ever need OBD-II.
www.autodiagnosticsandpublishing.com/Automotive_Diagnostic_Repair_Book_Catalog.htm
Thank you for the reply!
I have an Audi 100 2.5 TDI AAT 1993. I am trying to change the OBD2 to observe the DTC by my ELM. I connect the K-line to pin 7, L-line to the pin 15, the chassis ground to pin 4, the signal ground to pin 5, and the +12 V to pin 16. Still, I could not connect to the ECU. What should be the problem? How can I communicate with the ECU? Is there any suggestion?
www.autodiagnosticsandpublishing.com/scan_1_obd2_auto_repair_scanner.html
This vehicle is NOT OBD-II. You'll never communicate with a 1993 using a cheap ELM. You need a VAG scanner.
@@ADPTraining Thanks a lot. So, can I communicate with a LAUNCH scanner? My vehicle has MP14 pin diagnostic, and I have a transmitter to reorganize it to a 16 pin OBD2. I am working on re-wire diagnostics to communicate with a LAUNCH.
Thanks So much. With respect to point 2, does ECM receives sensor ground and chasis ground from DLC connector, if not i dont know why DLC need to have sensor ground and chasis ground in the connector.. please if u can.
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This comment made me laugh
I'm not getting any power to my obd II scanner. I plug it in and then Key on engine off. 96 f150 5.0
Quick question, my car has no wires on pins 6 and 14. Therefore I cannot do the resistance test on the CAN bus. How else can I do the resistance test on the CAN? thank you.
If you have no wires, then it doesn't have a CAN network. What year is it? Year, make, model engine size.
@@ADPTraining its a 2006 b9 tribeca. 6 cylinders. With a p0500 code, left front wheel speed sensor. With the abs light on. 3 new sensors and abs module replaced and it still the same. OBD report says CAN shorted or grounded or bad PCM.
the DLC for my Lumina 2003, LTZ 3.8 V6 is different than this respectively, pin2, 4 connected to earth, 5 to earth , 9 for primary serial data, 12 for ABS test enable and 16 for battery voltage but all other remaing pins are blank(not connected to any ECM or computer or electronics circuits, I don't know why its different .
do u think it's possible to write to the ecu lets say activate breaks
I am using a Scan Tool software for my car but the ECU is not connection what may be the problem? ELM is connected
What's the year make and model. I can help, but I'm not a psychaque. The network works like this:
sites.fastspring.com/autodiagnosticsandpublishing/product/automotive_computer_network
how i fix I not have communication no read noting and see no communication? ?? pliss hepl
I have a 95 dodge stratus es, I have power to the 16 pin and I have continuity to the #4 pin,still my code scanner does not communicate,what could be wrong?
Gerardo Acosta 1996 and Newer Vehicles use the OBD2 standard communication protocol. You must check and make sure the OBD port on your car is wired according to the OBD2 standard. You might have to make some changes, such as placing a jumper wire between pins 7 & 8. (Just an example, do NOT attempt without research first).
Find an OBD port pin-out wiring diagram for your specific car (Year, Make, Model, Regions), and compare it to the OBD2 standard communication pin-out wiring diagram...
My first advice would be to search and read up on some Forums specific to your car...
Thanks Mandy Awesome.. One Last Question, does DLC talk to Gateway via CAN or it uses any other PIN in those 16..
2) What does Sensor Ground and Ground in DLC have anything to do..?. i can understand that B+ on 16th pin is to provide scanner the power. not sure the sensor ground and ground purpose?..
3) does CANhigh and CAN low from DLC is connected to Star network or it is connected to PCM.. pls advise.
I have a actron OBDII auto scan tool model#cp9135, It will not do a scan on any vehicle 2006 or newer! it works fine on 2005 on down to 1996 vehicles! this model has no update portal ! Do I have to puschase another scan tool to scan 2006 thru 2013?
i assume, DLC, PCM or ECM, BCM are connected as node in network. Is it possible if I Can SCAN BCM when my ECM is bad for U codes?... second, what should i check if DLC is bad, just power, ground,sensor ground??. Third what should i check for bad ECM, just for power and ground?.. 4th). all latest card that have CAN network can also talk in other protocol such as LIN, BEAN etc.. is that right. I assume CAN is mandated only for PCM/ECM communication, not for BCM or chasis is that right.
wait a second, you have to get this vdo straight, this is NOT DLC, it is DLC3 (aka OBDII - 16 pins), the DLC is 23 pins.
No, it's an OBD-2 DLC connector, 16 pins. Thanks, subscribe to our site.
autodiagnosticsandpublishing.com/
A mechanic pulled my obd2 plug out of the wires and now I have no power to the plug so I want to check to make sure the wires are in the correct place. Is there a diagram for the wires so I can check wire colors are in the correct place?
Here's what to do: get the wiring diagram here,
www.autodiagnosticsandpublishing.com/Automotive_Interactive_Wiring_Diagrams.html
Then, match the colors to the OBD-2 pin positions and snap the pins in place. There's really nothing else to do.
Make sure when purchasing the wiring diagram, give us year, make, model, engine, and type network/OBD-2 system.
how many volts is the pin7 supposed to be?
Pin 7 is K line 9141. An old protocol no longer in use. I have an Ebook on the subject.
sites.fastspring.com/autodiagnosticsandpublishing/instant/automotive_computer_network
@johnnymonjohnny10 All we ask is that you post and procreate. Good luck to you.
gracias por impartir sus conocimientos, es posible que encuentre estas publicaciones de ADPTrainig en el idioma español, gracias.
Si, mire aquí.
autodiagnosticsandpublishing.com
I have 2002 VW 1.9 ALH engine swapped in an 1992 Isuzu pickup. I am getting no response from controller. Which book do you offer that will help troubleshoot this issue.
Here's my website. I have Ebook Download with immediate email delivery. I also have software download. A wiring diagram for your system is important.
autodiagnosticsandpublishing.com
As I said, I have over 50 publications. You may also need a proper IA Wiring Diagram from your system.
I also have the BMW Ebook here.
www.autodiagnosticsandpublishing.com/Automotive_Diagnostic_Repair_Book_Catalog.htm
Ok I have power on Pin 16 and ground on 4&5 What seems to be problem?
You tell me, what's the matter?
@@ADPTraining my computer does not communicate with my scan tool,but I have power on my#16 pin,and I have ground on pin 4&5 that's the problem
in my toyota hilux there is a diagnosis socket in engine pay it is 22 pin there in it a tiny Bridging pin what can happen if i remove the Bridging pin ?
thanks for all great videos .
This is the older diagnostic Toyota proprietary connector. The jumper is for diagnostic purposes. Each one of those pins is a different module. That connector also provides datastream on the Toyota factory tool. I suggest you use the underdash OBD-2 connector for all your engine and transmission issues.
ADPTraining
thanks for replay.
some one told me I should remove the jumper.
If I removed the jumper can I drive the car normally ?
ADPTraining
in the repair manual they mentioned a variable resistor what is it ?
is it a tps sensor ?
Yes, a variable resistor is a TPS sensor or any other sensor that's 3 wires and changes through lever action. It may not be a true variable resistor, but operates the same.
thank you very much.
Good video but a human voiceover would improve it further
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switch pin 6 and 14 to make stealing your car a bit harder...
Why is it that next to NO ONE has a clue when mixing their audio sources? Music should NOT be blasting, but turned down for speech. LEAVE THE MUSIC VOLUME DOWN! HATE dummies like this. After 12 videos in a row like that, I had to stop on one. (There were 9 videos with normalized volume)
I love you too @Steffen. These videos are older videos when Apple Final Cut was the order of the day, but what do I know. Anyhow, enjoy my FREE channel ADPTraining.
autodiagnosticsandpublishing.com
It is 2023 get yourself a decent video camera with not so sh**ty resolution
This is older vid.
Thank you for the wonderful job you are doing may God bless you and give you more knowledge.