2009 malibu no communication with scan tool. ) and the check engine light didn't come on KOEO.

2009 malibu no communication with scan tool left key on killed battery replaced battery then no crank. Missing power and ground. Slots occupied (from top left to bottom right) are 1, 4, 5, 6, 14, 16. It receives power but will not link. Does anyone know what might cause this and how to fix it? I don’t have a ton of $ to pay for repairs. I will reconnect the scanner right now to retrieve the code numbers. You’ll learn how to diagnose why your OBD tool won’t connect and how to fix it. Disconnect each module one at a time and bypass the module by using jumper wires to connect the high speed LAN bus back together. OBD2, short for On-Board Diagnostics II, is a universal system that connects your vehicle’s computer (ECU) with a diagnostic tool. If your OBD2 scanner not communicating or OBD2 port isn't Apr 24, 2025 · Your car's OBD2 port isn't responding? You're looking at a blank screen on your scan tool instead of the diagnostic data you need? This can be incredibly frustrating, especially when you're trying to figure out Jun 21, 2024 · Car scan tool, like those from Foxwell, are must-have tools for diagnosing and fixing problems in modern cars. And having a bunch or weird electrical issues. I have the “low fuel” Service traction” “No esc” “esc off” “power steering” message pop up with the key in the run position. Ty Diagnosing and Resolving Lost ECMPCM Communication If you're experiencing lost ECMPCM communication in your Chevy vehicle, here are the steps you can take to diagnose and resolve the issue: Perform a Diagnostic Scan: Use a compatible diagnostic tool to scan the vehicle's computer system for any diagnostic trouble codes (DTCs) related to the ECMPCM. 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. Nov 1, 2021 · If a module like an ECM can’t communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. Power to the radio, climate control, door this video was filmed using my iPhone 12pro. pos Apr 24, 2025 · Your diagnostic scanner refuses to talk to your car, and you’re left wondering if it’s the scanner, the car, or something you’re doing wrong. With Mercedes there is no such easy Mar 28, 2022 · Scan truck with a snap on solus scanner. May 12, 2021 · Here are the most common causes for an airbag module reset and what you can do to address them yourself. We would like to show you a description here but the site won’t allow us. Verify power and ground circuits at the DLC using a multimeter. 4l u0100 code no crank. The shop said it will not communicate with a scan tool and the customer installed a new fuse box and a new ecm and it still did not fix it. Connot read codes. 09 Malibu no crank no start no communication between scan tool and dlc. Anyway, the car drives fine with no check engins light on & now has 102k on it. 6L that had the Tranny replaced by dealer due to recall (wave clutch issue) at 98k. An experienced automotive technician understand that communication issues can be caused by various Jun 10, 2019 · hi i have brought used gmc acadia 2009 , 6 months back initially it connects with my OBD 2 scanner , and working very well but suddenly 2 days back it not Jun 21, 2021 · U0100 is a generic diagnostic trouble code, meaning it has the same definition for any vehicle made in the 1996 model year or newer (including the Chevy Malibu). I am looking for some help. Pin 16 is the positive voltage side being supplied to the ECM. com Technicians may find various Local Area Network (LAN) communication Diagnostic Trouble Codes (DTC) and no low speed GMLAN communications with the scan tool. In this guide, we will learn the reasons for unresponsive OBD and how to fix the OBD communication failure issue step by step. However, on some rare occasions certain issues can make connection and communicating to the system troublesome. I have no idea how many gears are in the transmission or the knowledge to differentiate them. I 09 Malibu no crank no start no communication between scan tool and dlc. Ecm has been checked. Used 2 different diagnostic tools, older Snap-on Verus and an Autel Elite, with no communication to either one. Won’t crank when key turned. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. also no start condition. If, however, your scan tool won’t even power up when you hook it Vehicle having issues? Here's several tests to properly diagnose your PCM and some reasons as to why it won't communicate. Here's how to fix obd2 port not connecting with any automotive scanner. OBD has power but no communication? Learn what causes this issue, how to troubleshoot it, and when to contact SOLO’s auto computer repair specialists. It also shows a BCM code indicating an inability to communicate with the ECM. I'm trying to sell and when they connect up to port to due emission testing there is no communication. cannot communicate with code scanner. Can I get a pcm wire diagram and a diag procedure for this code please. There appear to be 6 pins in the 16 slots of the port. Power to the OBD2 port seems fine as scanners will power up, and I've Sep 6, 2025 · Before troubleshooting why your OBD2 scanner is not linking, it’s essential to understand how the system works. Mar 13, 2013 · I have a 2007 Malibu with I-4 that will no longer connect to various OBD2 scanners. U0164 quick overview Jul 24, 2022 · Hello everyone, I had a mystery issue today on my 2008 chevy malibu 2. the can communication had problem because of poor connection to one module. I have my scan tool hooked up and the ECM is registering the crank request when I turn the key, the neutral safety switch registers correctly if it’s in park or 2008 malibu. Tried several scanners and the scanners all work on other vehicles. Apr 13, 2025 · I have a 2009 Malibu LT 2. Customer: There's no communication with the OBD2 port, but I have power to the scanner. It is a critical issue that should be addressed promptly to maintain comfort and functionality within the vehicle. I have an 05 Cobalt LS that has the MIL light on. 4 4Cyl, MFI, DOHC, HO, Ecotec, Lt classic. When plugging scanner in it will power up, the problem is there is not continuity on pin 4 or 5 and both of those are grounds. Jun 2, 2021 · Chevy Malibu U0073: Symptoms The symptoms associated with U0073 are going to depend on your Malibu’s engine and model year, as well as whether there is an intermittent communication problem, or if there is no communication at all between the control modules. I hooked up a OBD scan tool that is can compliant and has worked on the vehicle before. Sometimes, it happens due to OBD communication failure. Pin 4 is chassis ground and is a ground Refer to Power and Signal Distribution > Data Communications > Scan Tool Does Not Communicate with High Speed GMLAN Device OR Diagnostic Trouble Code (DTC) List - Vehicle in SI. When writing this post, I assumed your scan tool powers up when you plug it into your vehicle’s OBD port, but it just won’t connect. Mar 10, 2025 · Is the Onboard Diagnostic 2 (OBD-II) port on your car not working? Are you using a diagnostic scanner that will not connect and communicate with the vehicle’s systems? Perhaps you are trying to pass the emission or smog test but fail because the OBD-II port has no power. Mar 29, 2025 · Trouble code U0100 is a generic code for a lost communication problem. meetings. I was leaving work today hopped in car and turned ignition on all lights come on normally, then turned ignition to start car and nothing, no start or even cranking or clicking Jun 21, 2016 · Without this CAN bus, control modules cannot exchange information, and your scan tool may not be able to communicate with the engine control module, depending on which circuit is affected. Learn how to fix lost communication with TCM without replacing it. 2010 Chevrolet Malibu LTZ 2. Read more about this here! Jul 17, 2024 · On my 2006 malibu, car run fine but she an alcoholic and Im thinking on sending her to A. Mechanic's Assistant: What’s the year and model of your Chevy? Customer: It's a 2006 HHR. Learn more about the U0100 trouble code and see how to fix it by reading this article. Replaced the transmission computer recently because it lost communication with the ECM. When your OBD2 scanner won’t connect to your vehicle’s ECU, it’s not just frustrating—it can delay important diagnostics and repairs. Jul 22, 2009 · There is no chips to change in this computer, there is power going to OBD plug so no blown fuses and the reason for replacing the computer is the same thing, van would not run, no communication from OBD port assumed it was a computer issue as the van has no fuel or spark. Changed the power assist See full list on cartipsdaily. 4L OBD2 No Communication Issue Malibu often faces OBD2 communication loss and faulty wiring harness or connector corrosion issues. 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. This information helps you pinpoint problems In this video I explain why your ecm/pcm is not communicating with scan tool or the ecm is not communicating with the tcm, bcm, abs module etc If you're receiving U0001, U0010, U0100 diagnostic Feb 11, 2021 · In this post, you’ll learn about each of the common reasons an OBD scan tool won’t connect to a vehicle. ) and the check engine light didn't come on KOEO. Com or a high end Snap on or Matco. The sections that follow will help you identify the system and describe how to do the relearn. Oct 1, 2024 · Either, you have no communication with the scan tool, or you may retrieve a communication code (s) indicating a specific module (s) are not communicating. When a vehicle has Aug 8, 2013 · Ok guys. {File55169] [2009 Chevrolet Malibu LS, ECM/Inputs/Outputs Photo] [2009 Chevrolet Malibu LS, ECM/Inputs/Outputs Photo] [2009 Chevrolet Malibu LS, ECM/Inputs/Outputs Photo] Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. This code tells you that communication has been lost between the ECM/PCM (main computer) and a particular control module has been completely lost. Feb 25, 2017 · You stated that there was no communication with the ECM (It's possible it's the scan tool, but unlikely in this case. Jan 10, 2023 · This is a complex problem involving damaged wiring or the CAN bus system: Look for YouTube videos or other resources specific to your car model/brand for troubleshooting tips. Now it will not communicate with ECM, TCM, ABS and BCM. Working on a 2009 Chevy Malibu 2. Customer: 2009 Malibu 2. The OBD-II port may not work for several reasons, but the two most common problems are low battery voltage and a blown or The following diagnostic tips may help in locating the source of a loss of communication with a high-speed LAN module. Possible blown obd 2 port fuse. The will help you solve the scan tool won't connect problem. You need a Mercedes capable scan tool such as the icarsoft or startool found at www. Pin 4 is chassis ground and is a ground taken from Dec 31, 2020 · Help! I just went to get my car inspected by the NJ MVC and was told it was rejected because the OBD wasn’t communicating with their computer. Jun 3, 2024 · Check the Wiringharness Inspect the wiring harness leading to your OBD2 port for any signs of damage, such as frayed wires or loose connections that could interfere with communication between the scanner and ECU. 4K views 8 replies 4 participants last post by joeldelrosario1227 Mar 11, 2025 R Scan tool not communicating or connecting with OBD II port / data link connector. Scan Tool Does Not Communicate with High Speed GMLAN Device. If your OBD is also not responding/connecting, you can try these tips to solve the issue. Just long enough to read all the modules (most A diagnostic tool read no communication with the ECM and TCM. A. I looked to see if any are pushed back in and not making contact. Through this connection, the scanner can access fault codes, emission data, and live sensor readings. Oct 19, 2024 · Lost communication with ECM Jump to Latest 2. Mbstartool. Aug 20, 2018 · I have a 2009 Malibu 3. Mechanic's Assistant: What’s the approximate mileage on your 2006 HHR? Customer: 200,000. Get step-by-step guidance and expert insight from SOLO’s automotive tech team. For no OBD2 communication, inspect the DLC (Data Link Connector) pins for corrosion or damage. 7. Car uses extreme amounts of gas and OBD2 wont communicate. Enjoy the show lol. This can be performed by using the OBDII connector. Oct 29, 2021 · If an engine control module (ECM) can’t communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. Any sign of damaged wiring could prevent proper communication from taking place between the ECU and the scanner. Common U0073 Symptoms Include: Check Engine Light Poor Fuel Mileage Reduced Engine Power / @dcfgarage Is your OBD2 port powering up but not connecting? Don't worry, we've got you covered! In this video, we'll decode the mystery of the OBD2 port and give you some troubleshooting tips How to fix a U0100 engine code: Lost Communication with ECM/PCM Test OBDII Port Video: • Fixes OBDII Scan Tool Does Not Communicate A U0100 means that the vehicle CAN Bus can’t communicate If the scan tool or data bus diagnostic tool is connected to the vehicle, the BCM may appear to be "off- line" (no communication with the BCM) during that complete ignition cycle, but there will be communication with all other High Speed GM LAN modules. Peter, what kind of scan tool are you using? On our OBD port the AAM handles most of the communication but if you are using a generic scan tool you are only accessing the engine module and the engine module can be the issue. Oct 19, 2021 · Hooked up scan tool and when I turn key to start it says ignition deactivate, but when I put key in run position or or I mean it days ignition active. the Remove the battery feed fuse for each high speed LAN module one at a time, while monitoring the scan tool to see if communication returns with the other modules. Port was working fine, now it is dead. Chevrolet Malibu 2008 For 1990-2009 cars only. 4l with a 6 speed trans. Mechanic's Assistant: Is there anything else the Chevy mechanic should know before I connect you? Rest assured that they Mar 11, 2014 · Fixed 2004 Chevy Silverado 1500 no communication with modules but power to the obd2 port. Changed the power assist Here's a few of the other Fluke 87 V photos. Car was running fine. Scan Tool Not Compatible with Your Car Not all scan tools work with all car brands: Check the scan tool description and reviews for compatibility information. Aug 20, 2023 · Some common causes of communication problems between the ABS and scan tool include a failing battery, faulty ECU, and a loose connector. Idk if I'm chasing the wrong problem idk what else to the ignition I can replace which leads me here. I see no evidence of that. 4 Ecotec 4 Cyl 4 speed auto. Feb 26, 2014 · 2009 LT 4cyl. Using an OBDII scan tool to communicate with vehicle ECU is generally considered pretty straightforward task. If I unhook the battery, hook it back up I can communicate with everything for maybe 30 seconds, then they all lose communication again. It will not crank or start. Follow along as we try to figure out what is causing Nov 12, 2023 · The code U0164: Lost Communication with HVAC Control Module indicates a communication failure with the HVAC Control Module, which can affect the performance of the vehicle’s climate control system. However, a common issue that technicians and car enthusiasts face is when the scanner can't connect to the Electronic Control Unit (ECU). If the scan tool does not receive data from an OBD II vehicle 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. Scotty Kilmer, mechanic for the last 48 years, shows how to fix a broken car the won't communicate with a scan tool so you can't get any information on the problem. I'm already aware of fuse issues with the OBD connector so I pulled all ECM related Aug 14, 2022 · Suppose you inserted an OBD2 scan tool in your vehicle, but it doesn’t connect with your device. How do you know what system your vehicle has? Just look at the keys (see page 4). If the scan tool cannot communicate with any high-speed LAN modules, check for proper terminal drag at the DLC terminals 6 and 14 using test probe J-35616-14 or -2A. Still communicates with other modules. dncy yis iwdtz sej zwlsre oncrq vwnzfu pho uvwb lfkyq tpaqmr nxm jbheyb ysgqazucj jrmr