Get it replaced so that you can detect the error codes and allow them to be displayed. The end of the cable will normally have a 16-pin plug that should give a perfect fit into the cars outlet. Thus, its also possible that the data link connecter got damaged or is malfunctioning if the OBD2 port fails to communicate. Now, measuring resistance not at the DLC but instead at CAN In and CAN Out (at the disconnected controllers block connector) will identify which side of the circuit is at issue. 1 Faulty OBD Plug or Socket This may seem simplistic, and you are correct, but it's worth exploring for two reasons. But if you know your way around the various causes, it would be more efficient in the long run. Checking your vehicles socket is a little more work but not much. Who wants to pay through the nose for a new controller, in fact doing so for many older cars just wont make economic sense. 05-22-2011, 08:53 AM. Since the third-party tools and accessories can cause issues if not installed properly, you may also want to check the wiring of such accessories if you have them. In addition, well check the resistance of the CAN network. There are various chances of OBD2 being unable to connect with your car. The most common reason for getting no OBD code is simply a blown fuse. There could be various possibilities that make your OBD2 port not work properly but the problems are typically related to the OBD2 fuse, aftermarket system. My Service Engine Light Is On And The Diagnostic Plug Is Not Working. I hooked mine up and went through the steps normally, and it won't connect. Well place a fine metal tool between the pins and feel the resistance when we remove it. Your car dealer or your units service center may be able to help if your OBD2 port problem persists. Remember, back probing terminals are advised unless you have fine non-invasive probes. obd2 has power but won't connect. All by the way for a fraction of the cost of a new main dealer fitted unit. It is an Action Autoscanner Plus (CP9580A). That will damage them. Controllers are expensive and complex units. Generally, taking your OBD2 to a mechanic is the best option for getting it fixed. Youll learn everything you need to know about OBD2 and the potential issues it can cause in your vehicle, particularly with the wiring. My name is Hank, and I've been in the automotive industry for 27 years. There are a number of reasons why the DLC can fail, including as being damaged or burned, being used to charge a gadget, or being plugged in. This, of course, is only possible if you have a good working wiring diagram. In other words, your. If you plug in to your OBDII data port and nothing happens, you need to find why. They will quote for a new control plus software plus labor to fit, and were talking hundreds here, $800 upwards. Afterward try checking the fuses and see if they are working fine. Most good scanners will have a detachable and, therefore, replaceable OBD cable. Finally, the DLC or data link connector will be connected and other procedures will be taken to fix the non-communication issue. As a result, your OBD2 may not be able to communicate if the fuse in your cigarette lighter is blown. Do not connect to the body or chassis ground but to the battery terminal directly. According to the wiring diagram I have, the power to OBD is "always on" sourced via fuse #29 in the under-hood fuse box. Scan tools can communicate with a vehicles control modules and live data streams via the data link connector (DLC), which is a 16-pin diagnostic connection port found on many vehicles with OBD II compatibility. I replaced it and now the light stays on. Good bright flashlight Liquid tape / heat shrink / electrical tape Continuity tester / multimeter Wire (optional but helpful) striper / cutter Splices / Solder & Sodering Iron Pin out / wiring diagram About half a days time and a LOT of patients and flexibility. The PCM (Powertrain controller manages engine and transmission) uses basic data like vehicle speed to perform timely fueling or gear change decisions. When one OBD2 port wont communicate, the blown fuse is undoubtedly the winner based on the dominant number of the cases. Depending on how your CAN network is wired. In a workshop. In most cases, the OBD2 wont work because it lacks electricity. Test it with another car and see if it functions, if it doesnt, then probably, the issue is not with the scan tool. 5 Ways to Connect Wireless Headphones to TV. Use the min-max voltmeter function to capture the max voltages and min voltages. Well cover all these tests below, but before we do, well need the proper tools to make these tests. This issue prompted me to research online and ask different technicians that what the issue might be. But dont let any of this confuse you; they all just control modules. he is a prowed father of her little angel. The OBD2 is a feature that helps a lot in diagnosing your car. E61 2006. 3 CSS Properties You Should Know. Note: not every DLC slot will contain a terminal. Controllers are like black boxes. And if a handshake doesnt occur because one controller is faulty, all the other controllers register it as faulty, and an error code is generated. This content is owned by moc.sotuaytsur. I have a will crank but no start. Inspection was due on 3/1 and my wife needs to drive this, cannot afford dealer mechanic troubleshooting. Vehicle ignition should be turned on (Pos II). As an alternative, consider shipping just your controller to a specialist control module repair centers, they will test and repair your controller without removing its software, and so once repair and returned in the mail its a plug and play type deal. Ive checked all fuses and wires with my power probe and everything seems to check out. Feb 20, 2007. (Explained), F1 Steering Wheel Cost (Why Is It So Expensive?!). The Ancel automotive supplier company has been in business for decades, supplying the best car troubleshooting scanner. If no ground the circuit is broken somewhere between the OBD2 connector and the PCM What we do care about is verifying the following: Once we have checked the voltage, ground, and inputs, its easy to condemn a failing or faulty controller. (Explained), How Much Is Rhodium In A Catalytic Converter? spiritual meaning of someone stealing from you. With the battery disconnected and the voltmeter set to Ohms. Scan tool (3 different ones) won't link with the ECM. Most controllers are wired in series, with sub-controllers (Side streets off the main street); knowing which module is on main street and which is a side street is crucial to efficient resistance testing. In the illustration is an example of a Type A OBD2 pin connector (also sometimes referred to as the Data Link Connector, DLC). Mar 14, 2014 Communication line does not provide the power. As a mechanical engineer, its easy for David to explain the functionality of the tool. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. As the problem with the OBD2 port still persists after those troubleshoots, you may wish to seek assistance from your auto dealer or the service center for your device. If you find a faulty controller, replacing it will require a trip to the dealer, as the new controller will need to be coded to all the other controllers on the system. Thus, if the OBD2 port fails to communicate, it is conceivable that the data link connecter has been broken or is malfunctioning. It has its own different OBD system. That OBD2 port collects data from the computer of your vehicle via DLC. I even tried all 17 available protocols but it seems the interface can't get any info from vehicle. Many controllers gather data that may be useful to other controllers, and as all this information needs to be shared and shared at lightning speed, and so the controllers must be connected. Modern vehicles typically use a few different types of communication systems depending on how important the message is. The onboard diagnostic (OBD) computer cannot be connected because the data link attachment (DLC) is damaged or interfered with. How do I troubleshoot this problem? He completed his Automotive Specialized Training Course at Universal Technical Institute and has more than 15 years of experience in the field. As said, vehicles employ lots of controllers. We offer unbiased reviews of vehicles, as well as buying advice and news. However, if you know youre way around checking the possible causes of this issue, you can save a lot of money, time, and effort. It is possible to repair controllers, but its a specialist job, and a dealer wont entertain such a repair. Because of this, youll need to know how and why it occurs. Vehicle ignition should be turned on (Pos II). An OBD2 tester may not be able to communicate with the car during an examination if it detects manipulation. Yes No Saturday, November 17th, 2018 AT 12:29 PM ASEMASTER6371 EXPERT Floor Jack VS Scissor Jack? For a variety of reasons, the OBD2 is critical to a cars operation. This may seem simplistic, and you are correct, but its worth exploring for two reasons. Finding and fixing problems is straightforward once you have the power of knowledge. I have tried 3 different code readers (bosh, innova, and another) all will not connect. We dont know whats going on inside them, and we dont really care. Any ideas please, like why it won't connect via bluetooth. I've gone through the pins and found this out Pin 4 and 5 are working fine Pin 16 has full battery power Pin 14 and 6 have 2.5v coming out The OBD2 port receives data from the vehicles computer via the data link connector. It is considered manipulation, and it may prevent the car from communicating with the OBD2 testing equipment during the examination. However, if it has power but wont connect, you may want to check its connection to your entire system. wont connect to your vehicle, youd need to take action but they have to be the correct ones. I read at obdii site that some obd2 it's not a real obd2 compatible and this type comes at older model around 1991 - 1996 . Manage Settings If, however, your scan tool wont even power up when you hook it up, then check out this post, OBD scanner wont turn on it covers the simple fix in detail. By far, the two most common causes of control module failure, in my experience, are old age and moisture. Im aRed Seal-qualified Auto Service Technician with over twenty-fiveyears experience working on Classic and Modern Cars. The steps mentioned above should help you fix the issue if ever it happens to you. 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The most common causes of communication problems are connector voltage fluctuation, incompatible communication protocol, defective or missing data, a hung ECM, or OEM-updated ECM software that the OBDII scan tool cant recognize. 13lovecar14 New Member . If however the scanner is new or new to you, go ahead and check your scanners capability. Turn signal lights (10A). Tried to read OBD codes and code reader doesn't power up . John uses his know-how and experience to write fluff-free articles that help fellow gearheads with all aspects of vehicle ownership, including maintenance, repair, and troubleshooting. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Afterward try checking the fuses and see if they are working fine. # 9. In most cases, these issues necessitate the expertise of a trained technician. When connecting my OBD2 dongle to the obd2 port it gets power and my phone connect to the adapter perfectly. Every controller on the system is recognized and monitored by all the other controllers on the system. Thats not to say we disrespect kit or customers vehicles, but working on a workshop floor is all about speed. If, on the other hand, resistance is lower or higher than expected but not open, then a faulty controller is a likely suspect. If fuse #22 is ok and pin #16 of the DLC has power, then check fuse #22. Jeep Cherokee Won't Start But Has Power, Causes #5: Defective Spark Plug. Copyright Rustyautos.com 2019 Virginia, County Cavan, Ireland. OBDII runs on same circuitry as GMLan and your GMLan obviously works because your car is not in limp mode. Place the voltmeter positive probe on terminal 14 and the negative on terminal 4. For this test, well do what I said was rarely a good idea. Sounds like the controller, BCM or PCM is/are getting ready to fail. In the event that communication ceases, it might be extremely frustrating. . In general, such problems need repairs from a technician who knows his way on these parts. Nah, no testbook necessary- just your all-standard check engine light. Create Device Mockups in Browser with DeviceMock. I checked for blown fuses, especially cigarette lighter as tech suggested. In most cases, it can be a cabling problem, or the OBD2 itself isnt working. Has the 6.6 Duramax in it. Thus, one of the best ways to examine your OBD2 is through the cigarette lighter. Only the power light comes on when plugged in. This way, you might still be able to obtain information about whats wrong with the vehicle. The consent submitted will only be used for data processing originating from this website. Connect the Code Reader's cable connector to the vehicle's DLC. In this video I fixed the OBD2 port on a friend's Cadillac DeVille that was not communicating with the car. In this technique, you may inspect the fuse and replace it if necessary. Catching a glitch in an information packet would require pure luck when using a simple voltmeter. Have you tried either Vol-FCR or Brick-Diag Free v0.0.6.6 with a **not**-ELM327, "dumb", straight-thru cable that connects to at least pins 7 . In that case, you need to check the spark plugs. easydiag dongle only connect to their own software call easydiag as well . David test most of the tools before writing a review. If you've plugged into your car's diagnostic port and aren't reading anything, you might think that your OBD-II brain has been fried, but don't declare it dead yet. 5 Ways to Connect Wireless Headphones to TV. All fuses are good. Third-party devices such as stereos and other electronic devices can be powered by the DLC or OBD2 port wire harness of some aftermarket system distributors. More than this means theres excessive resistance in the circuit. I am finding that samsung blue tooth has a bug that torque cannot deal with. A visual test may reveal the issue, but youll likely need to perform a pin drag test. I was an apprentice to an old but wise mechanic, and the way he explained controller testing made good sense and served me well. Everything passed, EXCEPT they could not connect to the OBD2 module. Nissan says I'm out $100+ to have the car evaluated - not under warranty - even before work is done. obd 11 scanner won't connect. Turn off your vehicle and plug the OBD2 scanner into the standard OBD II data link connector which can be located under the dashboard on the driver's side, the left side of the staring wheel. In the event that my OBD2 has electricity but refuses to connect, what should I do? They are part of a network of information. Controllers, therefore, share information. (Explained!). a. The system needs a 12-volt power source, so if the battery is dead or there is another problem with the electrical system, the OBD 2 system will not work. What is Dodges fix for the controller wheeler1 said: Just a precautionary note. In most cases, the OBD2 wont work because it lacks electricity. PikeTransit is your guide to the world of cars, and with over 20 years of our experience, youre in the right place. (adsbygoogle = window.adsbygoogle || []).push({}); Each system will have its own dedicated control module, also called controllers. Its known as the handshake. Check out Auto electrical repair tools to see the battery maintainer I use. Locate the vehicle's 16-pin Data Link Connector (DLC). I suspect that one of two things are happening to you: 1. When the scanner will not connect, usually the first thing we look for is a blow fuse or lack of power at the OBD2 connector.