Obd2 has power but won t connect

Obd2 has power but won t connect. However, ever since that incident my OBD2 is not talking to anything I've hooked to it. Scanner powers on but cannot communicate. The Controller Anti-Lock Brakes (CAB) is not interfaced with the PCM through the CCD Data Bus to my knowledge. Feb 26, 2022 · When connecting my OBD2 dongle to the obd2 port it gets power and my phone connect to the adapter perfectly. But I can no longer moniter things by way of the OBD2. Truck runs as always, like a champ. Feb 27, 2012 · To my knowledge, they have not/cannot lock out the scan tools. That being said I have not made much progress. 3. It’s like having a power outage and attempting to charge your phone. Apr 13, 2021 · In this video, we'll decode the mystery of the OBD2 port and give you some troubleshooting tips to get your car's diagnostic system up and running. Blown OBD Socket Fuse. What is strange is my bluetooth obd2 reader connects just fine using the torque app on my phone. Look for a fuse that includes DLC its description. Following are the common reasons why OBD2 does not communicate with ECU-Blown power fuse in the fuse box. The problem was the Climate Control. 8l. I even tried all 17 available protocols but it seems the interface can't get any info from vehicle. May 20, 2023 · One of the most common causes of no communication is a blown OBD2 fuse. Here is a picture of the pins needed. This terminal should be powered at ALL times. If the power source itself is out, then it won’t be able to power on anything else. Jul 5, 2017 · I have a 2005 Chevy Colorado. Feb 5, 2010 · I replaced it and now the light stays on. Here’s a list of issues the car is having: Gauges not working (Speed, RPM, Temp), gas is good; Milage won’t track; Lights on Dash (ABS, Power Steering, Airbag, Brake) A/C not Jun 26, 2019 · 08 3. These include but aren’t limited to: Incompatible scan tool (Use a professional scanner) Blown fuse; Corrosive pin; Worn socket/pin Jan 20, 2013 · The OP had a 99. Many people who have OBD 2 systems in their vehicles occasionally have trouble connecting to the system. Can a software update fix the OBD2 scanner connection problem? Are you experiencing issues with your OBD2 port not getting power? Don't worry, we've got you covered! In this video, we'll walk you through a simple troubleshooting process to diagnose and fix “Obd2 Has Power But Won’t Connect” is a common problem. But out of all the ones I tried with Torque pro this one worked great. Verify that there is power to relay 302 with the ignition in the run position. I have a cheaper OBD2 scanner that I tried as well, and got the same result. 32 volts at the class 2 data wire from pcm pin58 to the obd2 port pin 2. This problem is really common for cars. Why OBD2 Not Connected to ECU. If not then see if you can buy another cable (if it removeable) that has those pins. Battery is been changed by previous owner and its NON oem. Some cars are made before 1996, and they show reluctance to connect with the OBD2 scanner as they do not have the system. So I called my mechanic he came over with his Tech II computer. Is this a cpu issue or a wire issue? If it was a wire then power would not be constant? Did look for this in issues but did not see it thanks for any help! Please remember it does have power so it's just a data flow problem. I have had a couple of rare instances where the car has hesitated a little when it's cold. The problem is it won't talk to the ECU. " 3) OBDII Monitors Not Ready * When key in position 2, all lights are on includes "check engine". Note that pin 5 has "ground" in the description, but that is just for the communication signalling and not for power. Located under the dashboard, the 16-pin connector enables technicians and vehicle owners to connect compatible diagnostic tools or scanners to identify issues, Apr 12, 2019 · I have power to the obd2 port but will not connect to scanner tried 2 different scanners. I have had a similar issue when trying to connect my generic obd code reader to a friends mkiv golf, which is all stock, but does have a ccm problem (sunroof not working). 3L Power Stroke Diesel - OBDII port not working- how to fix? - I plugged in my basic OBDII scanner but I'm getting nothing back (the scanner works on my car so it's not the scanner). 7v to can bus 5v on the Jan 26, 2012 · 2010 Dodge 2500 SLT Crew Cab Long Bed 4WD G56 6SPD Cummins 6. I’ve been a mechanic for over twenty-five years, and plugging in the scanner to find it won’t power up is a very common fault. Like the PCM is mad at the port and won't talk lol. It is used to connect an OBD2 scanner or diagnostic tool to the vehicle’s onboard computer system. Since you have a 2001 Tundra, the communication protocol is ISO-9141 which uses just pin 7 "K line" for bidirectional communication with pin 5 as the signal GND (pin 15, the "L line" is not used or required and there is no copper connection present). Yes it has power. The closest thing to interfacing with the CCD Data Bus is the ABS light on the instrument cluster. All seem fine. I have a dongle by Automatic that lives in my OBD-II connector. Verified by both the obd connector, and voltmeter. I went to 2 local shops (not GM Dealers) who also could not connect. 3 volts. *** I have used Ancel AD410 and O'Reilly store's OBDII scanners, both were not communicated to ECU. If the scan tool does not receive data from an OBD II vehicle. Which all work with my other car. May 30, 2017 · It is an Action Autoscanner Plus (CP9580A). Checked all fuses in the glovebox compartment already. Checked wiring and fuses even swapped PCM with a used one that was good. May 9, 2024 · If your vehicle doesn’t turn on, then our scanners won’t be able to power on either. Have alresdy ordered a used pcm to connect ti the harness to see if it will communicateHave already ohmed out all the 4 wires to the obd2 port. Had no power in car with charged battery. Nov 23, 2013 · But it won't talk to the ECU (whatever you want to call it. It’s possible that you received a faulty unit, but there are many other reasons people face OBD communication failure with ECU. I can jump across the fuel pump relay to get it on it has 55# pressure. Ckeck for voltage at the fuse. 5A OBD fuse is what supplies power to the OBD2 connector. If your OBD2 scanner not Jan 9, 2020 · Fixed 2004 Chevy Silverado 1500 no communication with modules but power to the obd2 port. They both told me to have fun at the Dealership. He was able to get power just no connection with ecu. Have read that you 1) Overall Test Result "not ready". When I plug my Autotap into the port, the LED comes on indicating power but the software doesn't connect. Apr 25, 2019 · 1987 - 1996 F150 & Larger F-Series Trucks - 97 F250HD OBD2 won't connect - Hi I have a 97 F250HD 4x4 with the 7. First, the OBD 2 system may not be properly powered. May 2, 2024 · To connect an OBD2 scanner to your iPhone, purchase a compatible Bluetooth or WiFi OBD2 adapter. But in "car scanner" app it says vehicle is not responding in communication. It is the fuse on the power supply to the PCM (provides power with the key n the "run" position). There was power to OBD port. 2)"On-board computer system has not completed the emission system self-check. 8L OBD2 is powered but will not connect to cpu all the time. Finally, pair it with your iPhone through the Bluetooth or WiFi settings and launch the compatible app to begin diagnostics. now the smarty will power up, but refuses to connect to the truck, and i feel that the OBD is broke, however the pines are mostly screwed up to hell. It is hot all the time,where the other 2 power ports are only hot with key on. Apr 28, 2011 · These are the connections that power the ODB2 scanner/reader that you connect. Jan 10, 2007 · k first off, thanks for directing me to the stickies, i pulled a 7, bad tps. I have replaced the CIG fuse and verified there is power to pin 16 and good ground to pins 4 and 5. the obd port will always have power and ground regardless. There are a few reasons the OBD 2 won’t work despite power. The connector will always have power on these two pins regardless of the key position, and when you plug a device into the port it will have power and may come on by itself (many scanners do this). I've got power at the obd but it won't communicate. If you have 12V+ at Socket #16 (upper socket on Inboard Column of sockets) then Scan Tool should light, BUT the Bus Communication wires between the OBD II Socket and JBE (on E9x models) need to be intact to allow communication between Scan Tool and JBE. Power to the OBD2 port seems fine as scanners will power up, and I've checked various (but not all) fuses in the 3 locations (under hood, passenger footwell, trunk). A blown fuse is often the cause of a scan tool that simply won’t power up. I could use a wiring diagram of the OBD2 port and any idea as to what could be wrong. May 24, 2024 · Power-cycle Bluetooth by turning it off and on again in your phone/tablet’s Settings > Bluetooth menu. The OBD port does have power as the blue light on my blue driver will illuminate when plugged in. While doing a little searching I saw something about crank positioning sensors not allowing the OBD-II port to be read, but I'm not having any of the other symptoms. The port powers on the scanner but every time it says can't connect Jun 7, 2017 · Just to add to this, the 7. There are different reasons why your OBD2 is not connected to ECU so you won’t be able to retrieve and reset DLCs. To check if this is the issue, examine your vehicle’s fuse box and look for any blown fuses. Feb 1, 2009 · Check to make sure your old scanner cable/connector that plugs into the OBD2 connector has pins 6 & 14. Broken OBD power Oct 24, 2013 · I have a 2007 BMW 335i and i'm unable to connect with OBD II . In most cases, it can be a cabling problem, or the OBD2 itself isn’t working. 3 powerstroke. Used 2 different diagnostic tools, older Snap-on Verus and an Autel Elite, with no communication to either one. It powers on when connected, tries to communicate with it, but then eventually it says that it can't connect and to check the connection. Even if your OBD2 port has power, it won’t communicate if the fuse is blown. Dec 1, 2009 · For 7th generation Civics, there is a fuse under the hood that protects the circuit for the data link connector (DLC). Fortunately I also have an ELM327 Bluetooth adapter and Torque Pro, that is able to communicate and pull codes from his golf. ) I have read so much about them I dont know which way is up. 42 LSD. This is inline with the transmission shop where they said they couldn't connect either to my truck. Tried several different scanners. So has anyone replaced or fixed this, or is this a stealership only fix Jun 18, 2023 · In this video,Obd2 Has Power But Won’t Connect. still no connection. Jan 31, 2018 · I have an 06 Silverado 1500 5. TEST 1: Connect the positive DMM lead to DLC pin 4 and the negative DMM lead to the negative battery terminal, using jumper wires if necessary. have . 2006 HHR. Port has not damage or loose wires and scanner pins are good. Fixed all that and on the road again. From Launch x431 to basic handheld. A Tech2 will but you have to use the pre OBD2 cable if you have it. That would be against the law. Another option is to use an OBD to mini USB power adapter like this. Mar 13, 2013 · At one point a scanner was able to connect and clear a fault code, but now 3 different scanners are no longer able to make a link to the ECU. If the fuse is blown, the scan tool won't get power and therefore won't communicate with the ECU. You have a 95 and depending on which computer you have (under the dash or under the hood) and which diagnostic link terminal you have there are only a few scanners that will work. Add ons: Spyntec Free Spin Kit with Warn hubs (62672) Laramie Alloys, "Powerwagon" Flares, Powerwagon bed decal (4X4 off road) OE Ram mudflaps, OE Slush Mats, OE Clearance Lamps, Geno's shift knob in black, spray in bedliner, OE brake controller, Pro Tech Toolbox, Licensed "Extra" class HAM operator Jun 11, 2020 · The ignition switch receives power from fuse 116. Nov 26, 2022 · I do not deny that the faulty OBD2 scan tool could not be a reason. It works perfectly on all the other vehicles I've tested it on. Power for the scan tool is supplied through this fuse. Or maybe your scanner just won’t clear the damn codes; if that’s you, then check out this post Sep 26, 2021 · If my OBD2 has power but won’t connect, what should I do? Most OBD2 won’t connect because it has no power. On your phone/tablet, go to Device Settings > Bluetooth and select your OBDLink adapter. When I move the key to the ignition position the CEL light comes on as it should and goes off when the engine starts. OBD II data port has no power. If you have power there, then check the pins 4 and 5 for functioning ground. I have a check engine light on and when I try to read the code I get won't communicate with vehicle. Oct 14, 2015 · 1999 - 2003 7. When connected scanner has power. This is just recent that it hasn't worked. Oct 21, 2021 · Welcome to the Forum! Please provide Last-7 Characters of VIN & I'll provide ISTA ScreenPrints of wiring for the OBD II Socket. The OBD2 connector provides access to various data and trouble codes stored within the vehicle’s computer system. Next, plug the adapter into the vehicle’s OBD2 port. I checked the OBD2 port at a parts store and, sure enough, the scanner acts like it is connected to nothing. But I'm not Jan 3, 2012 · Major symptoms would be no power to either side of fuse 19 (intrument panel lights) no communication to obd2 port it has power but won’t communicate and I got underneath it with my multi meter to check for power to the pump and it gets battery power for less than a half second and cuts off to the dark gn/org asd wire 6. How can I troubleshoot OBD2 scanner connection issues? Check all connections, ensure compatibility, and try restarting the vehicle and scanner. An OBD2 connector, also known as an On-Board Diagnostics 2 connector, is a standardized port found in most modern vehicles. Don't let a simple issue prevent you from Jun 3, 2024 · Why won't my OBD2 scanner connect to the ECU? Common reasons include loose connections, compatibility issues, or a faulty ECU. You might just be able to use any OBD2 cable if it has the common connector that plugs into the scanner itself. The cars that are manufactured after 1996 are mostly compatible with the OBD2 system. Dirty/rusty OBD2 port. Do not connect to body or chassis ground but to the battery terminal directly Apr 6, 2021 · If it doesn't work, verify that you have B+ (battery voltage) to pin #16 of the DLC (Data Link Connector - OBDII port). Sep 11, 2024 · If there is no communication between the OBD2 scanner and the vehicle’s OBD port, the most common problem is a blown fuse, no power to the port, wiring short, or a failed module that brings down the vehicle’s Controller Area Network (CAN bus). All fuses are good. Aug 8, 2013 · It receives power but will not link. So do I have a bad ECU cause I am thinking so. Aug 1, 2022 · I tried plugging the OBD2 scanner in to see what the issue was. Check for voltage at pin 16 with the negative lead on a good ground point. I know it has that other type . Thanks, Billy C in York, SC Jun 20, 2012 · The shop tells me that when they plugged in their scanner to port and started up the car, the CEL started flashing again, and the OBD2 port didn't have power to read what the problem was. It allows for the retrieval of diagnostic information and real-time data from the vehicle's onboard computer system. Jan 29, 2021 · If your having trouble getting your scanner to connect, check out OBD won’t connect, and for code clearing issues, check out OBD won’t clear codes. But no spark or fuel when cranking through, good compression too. You can’t run No communication to obd2 porthave power to scanner. Jun 15, 2023 · The OBD2 (On-Board Diagnostic 2) connector is a standard interface found in most modern vehicles. Jun 8, 2012 · The service manual says pin 16 is the power on the obd port,the schematic shows it is tied to the cig lighter port,the one on the right. If you’re experiencing an issue where your OBD2 device has power but won’t connect, there are a few possible reasons and troubleshooting steps you can take. Oct 29, 2009 · 1997 - 2003 F150 - 2001 F150 OBD2 Port Problem - My OBD2 port doesn't work on my 2001 F150. I'm already aware of fuse issues with the OBD connector so I pulled all ECM related fuses in both fuse boxes and checked them all with no change. The CAB has its own microprocessor that will store any DTC's and to access them a special scan tool or DRBIII is required. Feb 11, 2021 · If, however, your scan tool won’t even power up when you hook it up, then check out this post, “OBD scanner won’t turn on” It covers the simple fix in detail. It is a Red wire with a Light Green stripe (RD/LG). Mar 21, 2021 · Scan tool doesn't communicate? Can't read trouble codes? Try checking for pin fitment issues on the OBD2 connector with this quick and easy method. If fuse #22 is ok and pin #16 of the DLC has power, then check fuse #22. Watch as I show you Jan 26, 2021 · I’m having an issue where my car won’t start and in RUN position there is no power to 15A Transmission Position Switch fuse nor getting power to the 5A GEM Park Neutral Switch fuse on the fusebox. Anyways I have a early 1999 F350 7. but, nah, when the tranny went, the shop called me and told me, "hey dude, your car is throwing a cel, we ran a scan on it a couple of times and we cant get any codes". And it would not connect. The will help you solve the scan tool won't connect problem. Aug 17, 2018 · About ten days ago, I was heading to work and my truck unexpectedly died with 9 miles to go. Yes and relays. Try checking for pin fitment issues on the OBD2 connector with this quick and easy method. 7 turbo diesel, 3. Sep 27, 2023 · I put the code reader on it, would not connect. Oct 29, 2022 · check the accessory fuse that powers the cigarette power port (usually the one closest to the driver), if the power port is not working then the fuse is burnt and that fuse also controls obd port communication. Again, our diagnostic scan tools source its power from the vehicle itself. I do have a car starter and after market radio, but both have been professionally installed for about 3 years now. When my truck died, I had no CEL and my OBD-II dongle was no longer connecting to the ECU. Here's how to fix obd2 port not connecting with any automotive scanner. Sometimes it will connect. I think the problem lies within the TIPM and I plan to replace it as soon as I the race season is over. Watch as I have a tech 2 and a smaller Mac the obd2 port has power and ground but will not connect. I went to get an inspection sticker and the state inspector was unable to get communications through my obd port. But now the question Apr 6, 2011 · Fast forward to 2009 when i first got a programmer that uses the OBD. It’s a common issue that can have a variety of causes including a bad starter motor, a clogged fuel filter, a faulty alternator or a bad ignition switch, to name but a few. My 2012 Ford Fusion will not communicate with . I ohmed the OBD2 port wires to the TIPM, OBD2 to ECM and TIPM to ECM. Checked all fuses and wiring. There is very low voltage to the "signal wire" pin 2. 2007 lacrosse with the 3. Scan tools scan every protocol but don't link. 3L Vin T. I cant connect any scan tool to my port and ive tryed store bought scanners all the way up too 5000 dollar snap on scanners. However, if it has power but won’t connect, you may want to check its connection to your entire system. In some cases, the OBD-II scanning tool is not compatible with the car or the vehicle. About 3 weeks now Oct 22, 2012 · First, the obd port has power. When the bluetooth connector is plugged in and trying to connect, the "data" lights are flashing just like they do on the other vehicles i've tried it on. It directs power to close the PCM Power relay (302) which in turn provides power to fuse 22. When the truck died, I had power to 12v Thjis is a custom engine installation into a jeep. This RD/LG wire also provides power to the FICM. (07 Impala and 07 VW Jetta). - Answered by a verified Buick Mechanic May 21, 2015 · When I got home I took an OBDII scanner, the same one I have used several times in the past to read the codes, and the machine did not connect at all to the car, simply the OBDII scanner does not power up. Try a Pm to AWD V8, he knows a lot about that OBD 1-1/2 they used in 95. Thus, you’ll have to take it to a mechanic soon Mar 11, 2014 · Everything works. have 2 grounds at 4 and 5 and battery power at pin 16. However, to my understanding, most power banks with enough capacity for that purpose are not safe enough to leave in the car. ordering the part from ebay tonight. Apr 20, 2017 · Most dash cams don't have a large enough battery to record while the vehicle is off so most people recommend using an external power bank. The jeep has been running well. Many times, a scan tool won’t power up because the fuse has blown. Feb 4, 2013 · That is odd. It should be 5 volts but it is 0. OBD II scanner I got from Walmart won’t connect, nor does the Bluetooth OBD II scanner that previously worked with the car. It basically logs my travel and can display basic codes. Note: You may have issues connecting if another OBD app is running, because the OBDLink adapter can only connect to one app at a time. ** In fuse box, no broke fuse fond. Jun 2, 2023 · When a car won’t start but you know that the battery has power and is not dead, it can be both frustrating and confusing. Called Blue driver, they gave me a different sequence to connect the code reader. 200000. tsbli tllmpjsg fonhvgd xhvj ousya ryjrrx zrfj wfa qdovl qdkqb