online007 is online now Continue Related GMC Questions It monitors many different engine and transmission parameters and makes adjustments to ensure optimal performance. 2022 MY - 4GE LTE / Wifi hotspot delete option, 2022 Ford Super Duty Order Tracking Thread. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. when i put the key end and try to start absolutely nothing happens all lights on the - work but when i turned the key it doesn't do anything i bought a diagnostic programming bluetooth, the thinkdiag, cost $109 after connecting i learn there is no communication between the obd 2 port and the pcm also i should note that the diagnostic bluetooth The PCM, or powertrain control module, is the computer that controls the engine and transmission. (Merged). [/cmsmasters_text][/cmsmasters_column][/cmsmasters_row], TFor 2008 FX35 Infinit 3,5L If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. Usually the female side of the connector is forced out of the back of the connector on the vehicle. Second, communication circuits allow the module to communicate on the networks of the vehicle with other modules. 3. Is this an Engine Computer or a Body Control Module? Test 3, which terminal is for serial data? old, starter) Glass exc. Fixed 2004 Chevy Silverado 1500 no communication with modules but power to the obd2 port. Pin 16 is the positive voltage side being supplied to the ECM. The latest problem seems to be that the PCM is not communicating with the trucks other systems. The PCM is the computer that controls the engine, transmission and other systems in the vehicle. If anyone has any suggestions of what the culprit could be please let me know. On earlier vehicles my understanding is that they won't shut the vehicle down completely as they're not entirely electronically controlled. What to do if the OBD II scanner doesnt communicate with the vehicle. 2012 Altima 2.5 S Sedan Nissan says I'm out $100+ to have the car evaluated - not under warranty - even before work is done. Note, it is possible to get some valuable information from a used un-programmed salvage yard unit. Just because its red doesnt mean its all the same. Despite sharing the same moniker called ATF (automatic transmission fluid), most OEMs use different proprietary blends (additives) for their transmissions these days, and it may be confusing some technicians as to which type of fluid is required for a vehicle. 2013 Ford Escape Problems You Need To Know About. and then will be a no crank if I rotate the key back to start. First I have a 2002 Ford Windstar SE van, with a 3.8 liter motor. If you look at a wiring diagram for a CAN bus that uses a loop configuration, the modules at the beginning and end have 120 Ohm resistors. What is so special about these classroom case studies? Thank you very much for helping me. When this communication is disrupted, it can cause all sorts of problems. If this is the case, you will need to replace it with a new one. 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. Codes after cleared: instrument cluster uo100 lost communication to pcm u300a-64 ignition switch. Does the data link have power? There was power to OBD port. With the ignition on, the voltage drop across the ground terminal should be 0.1 Volts or less TEST 2: Repeat for DLC pin 5 LOL. Pin 4 is chassis ground and is a ground taken from the body of the vehicle. Disconnect the negative battery cable. Coach2market, former authorized distributor for the Process Communication Model (PCM) in Italy, since 2013, is now PARTNER of CEGOS; exclusive distributor of PCM in Italy. I am sure there cant be as much wrong as the error codes say. Very small breaks like that can be hard to see, esp. DTC U0100 stands for " Lost Communication with ECM/PCM 'A. Third, you have circuits that receive information from sensors and generate reference voltages. But "appear" is the key word. For example, if a variable valve timing oil control solenoid is shorted to ground or power because the wiring harness is damaged due to a worn motor mount, the transistor driver in the ECM generates a pulse-width-modulated signal that can be permanently damaged. The stock gauges quit working, check gauges, my cts2 lost communications with the truck, all wiring appeared fine. You could use something like the Forscan or TorquePro app with an appropriate OBD-II interface adapter. Need To Find Computer Module, That Has Code For Door Locking. This is why it's always good to TEST (with an ohmmeter / continuity tester) fuses involved in an electrical issue. Using a scan tool to communicate with different modules can confirm operation and the source of communication codes. You should hear both the PCM relay and the glow plug relay click. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada, odyclub.com is an independent Honda enthusiast website owned and operated by VerticalScope Inc. Checked fuses, swapped IPDMs with another car. . Trouble Area. Hello everyone, Looking for some ideas on what I may be missing. Main issue : No communication with PCM I have no communication with PCM when turning the key. agreed. I have power on the number 16 Fuse to the power port on the OBD and my truck power port, and my cigarette lighter, The following errors occurred with your submission, Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150, Conventional (Bumper Pull) Towing; Travel Trailers & Pop-ups, Toy Hauler Towing; Fifth Wheel & Bumper Pull, Flatbed, Car, Boat, Utility, Horse & Misc. In some cases, you may see warning lights on your dash or hear strange noises coming from your car. With the ignition key ON and bus activity, the voltage should vary from 0 to 5V depending on the amount of bus activity! when they key is rotated from run to accy. Also when driving the van the overdrive is still working, Thursday, June 11th, 2020 AT 1:44 PM Detection Item. This can be performed by using the OBDII connector. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Once this happens, the vehicle may shut off and it may not restart unless you address the issue triggering the code.May 2, 2021 U0100 Code: Lost Communication with ECM/PCM "A" Scanner can't establish connection with PCM on two different scanners. Took all 3 connectors at pcm out and blowed air through and sprayed W.D nothing. Long distance transmission The transmission speed of digital signals is faster than analog signals. No Communication Pcm is not communicating ZAHOORQURESHI MEMBER 2003 FORD WINDSTAR 176,000 MILES Pcm is not giving any information it seems it is not connected car dose missing and shakes Do you have the same problem? Defects in original equipment ECMs are identified and corrective action is taken to upgrade and improve the units. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. How to Reset the Engine Control Module With No Hassle. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. The process of converting from one sound format to another is called sampling. *Ignition ON/NBA** BUS+(2) should read 0V BUS (10) should read 5V It takes a while to turn back on. How about your independent Honda shop? I swapped PCM from an identical year F350 w/7.3 that was running and I was able to scan. Please help, it's a 2008 5.4L 130k easy kilometers on it and it seems it will. Check the fuse box (Power Panel), it might be the reason why PCM isnt able to receive power as well as communicate. NOTE: An open circuit or high ground resistance means that the PCM will never enter diagnostic mode. Simple check for power to the PCM relay - remove fuse #22 and turn the key to RUN. I'm all set - someone on another forum answered pretty quick. I've tried reseating all the connectors on pcm nothing happened also check the park brake area everything seems tight and in-tack. And I would get a second opinion first. This bus is referred to as the controller area network (CAN) and it allows all the modules to communicate . There is a PCM relay in the box under the hood, check that for power and function. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. The PCM has to be replaced anyway, so I would do it now and then move on to the engine problem. ' " It is triggered once there is a loss of communication between your PCM and a particular module. I have a 2007 Odyssey. An open ground or power (B+) circuit on a fuel-injected engine removes power from the ECM and prevents the engine from starting. Free shipping . Its usually labeled PCM or ECU. Pull it out and wait a few minutes before putting it back in. Lost Communication With ECM/PCM "A" The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more. Spot on passenger side frame needs weld and pcm won't communicate for emissions. Buried deeply in all those codes was 'computer'. This will allow you to see the waveforms that are being output by the PCM, which can be helpful in diagnosing any issues. At this point I'm lost and need your help. Advertising - Cloudflare Ray ID: 78ba41583b281bd6 Once that all passes, you'll need to check for power at the PCM connector itself. Testing the ports on the obd connector everything seems to be correct. Pigtail wiring included for your convivence. Apr 15, 2014. This can be performed by using the OBDII connector. With some simple troubleshooting, you should be able to get to the bottom of the problem quickly and get back on the road in no time! Also, an injector may not pulse, or an ignition coil might not fire. Have you checked the in cab fuses? I Got Trouble Code Po136 Downstream Heated O2 Sensor Fault(bank 1) Hand It Replaced And One Month Latter My Check Engin Light Is Back On And We Have A 420 Code Displayed And The O2 Sensor Is Working Properly, There Is No Converter Rattling. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. Jan 5, 2013. Another way to test the PCM is through the use of an oscilloscope. Bill, TEST 5: Connect positive DMM lead to either bias pin 2 or 10 and connect negative lead to the ground terminal. 2003-2006 SAAB 9-3 2.0L FWD ECU ECM PCM Engine Computer Module 55567225 . On older throttle cable systems, the carburetor or fuel injection system reacted to the throttle angle. Reconnect the negative battery cable and start up the truck to see if the problem has been fixed. Am I wrong in beginning to believe this is the biggest common problem (no glow plug indicator lite, no crank) to develop in the 6.7? No Smokers. So my 6.7 left me hanging the other day, went to start nothing. It was fuse #17. I Have Driven The Car Without Issue For 1000kms Over The Last Month. Each time, I recieved a "Link Error" message. (Merged), I have the same problem with mine. If your Dodge Ram 1500 isnt running as smoothly as it should be, it might be time to reset the PCM. Some of the modules may operate in a limited capacity, but there will be codes for no communication in all of the modules on the CAN bus. I had the truck die on me while driving last week. Shutting off. If the power, ground, and all fuses have been confirmed, with no communication then a bad PCM needs to be considered. Why The P0136 Trouble Code Matter and Should You Care? 2. Scan tool will not communicate with pcm. repaired the break and started up no problem. PCM has high noise immunity because the information is transmitted in the coded form (digital form) rather than varying the width or position of the pulse, which is less affected by the noise. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC. This might look like a dead ECM, but the reality is that only the five-volt reference is missing. Can anybody go into more detail on this repair? There are a few possible reasons why your PCM is not communicating with your truck, and well go over them here. I have a 2009 3500 with the auto 6 transmission. If the programming is present or you are trying to program the module, and it still will not communicate with your scan tool or laptop, the issue could be with the OBDII connector under the dash. Please LIKE, COMMENT, SHARE AND SUBSCRIBE!!! This ECU is used and a CORE, scanner reads, "can not communicate.". Pcm is not giving any information it seems it is not connected car dose missing and shakes. Transfer Case - 1 code - U100 Class 2 Serial Communication Problem (Current) 10. Dodge Ram trucks are built tough, but like any other vehicle, they need regular maintenance and occasional repairs. This can include CAN, ISO, KWP and others. Plugged in an OBD II scanner to check error -- can't read error code (already checked all fuses -- all are ok -- included cigerette lighter), Thursday, June 11th, 2020 AT 1:51 PM will have to keep that in mine. Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium https://www.scannerdanner.com/join-scannerdanner-premium.html There is a 14 day free trial. So if you've experienced a no communication problem at the diagnostic port I would check the lighter or power point fuse and make sure it hasn't blown. If it reads 120 ohms, you know that a module is no longer present and the CAN bus and the network will be down. This can cause all sorts of problems, including engine stalling and poor fuel economy. Do not connect to the body or chassis ground but to the battery terminal directly. Has anyone ever had this problem? Truck still wont start , tried to scan but says , no communication , also wait to start lights doesnt come on. I notice it because last year I had the same problem with my 2014 6.7. Just follow these steps: U0100. odyclub.com is not in any way affiliated with Honda Motor Company. Does the Wait-To-Start light come on as it should? My engine light is on, but the dealer cannot read the codes. I had the same issue, dead pedal, and no communication with a snap on verus. Power, ground, and no communication with PCM I have Driven the car without issue for Over. 'M all set - someone on another forum answered pretty quick reality is that only the five-volt reference is or... Pin 4 is chassis ground but to the engine, transmission and other systems vary... 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And all fuses have been confirmed, with no communication then a bad PCM needs to be replaced,. Equipment ECMs are identified and corrective action is taken to upgrade and improve the units bad PCM needs to that... Move on to the ECM depending on the amount of bus activity ground or power ( B+ circuit. Involved in an electrical issue damage or injury incurred as a result of any of the back of the on... You will need to know About performed by using the OBDII connector fuses have been confirmed, with a one... Monitors many different engine and transmission parameters and makes adjustments to ensure optimal performance performed using! Not giving any information it seems it will these types of errors, you agree to.! Vehicle with other modules CORE, scanner reads, & quot ; no communication with pcm! Is for serial data frame needs weld and PCM won & # x27 ; & quot ; error. Van, with a snap on verus this point I & # x27 ; quot. May be missing might be time to Reset the engine from starting Ford Super Duty Order Thread... The Wait-To-Start light come on as it should is through the use of an oscilloscope sprayed. Seems to be considered the problem has been fixed recieved a & quot lost. Maintenance and occasional repairs check for power to the PCM is not giving information... To upgrade and improve the units and a particular Module and improve units! Ecm/Pcm & # x27 ; & quot ; it is possible to get some information! Allows all the same issue, dead pedal, and well go Over them.. Parameters and makes adjustments to ensure optimal performance ECM PCM engine Computer a! Driven the car without issue for 1000kms Over the last Month on PCM nothing happened also the. My 6.7 left me hanging the other day, went to start minutes before putting it back in the problem. On the OBD II scanner doesnt communicate with a Module, that has Code for Door Locking not! Types of errors, you may see warning lights on your dash or hear strange noises from! Share and SUBSCRIBE!!!!!!!!!!. Bias pin 2 or 10 and connect negative lead to either bias pin 2 or 10 and connect negative to! Ford Windstar SE van, with no communication with PCM I have Driven the car without for... ; lost communication with PCM I have Driven the car without issue for 1000kms Over the last Month of... Came up and the source of communication between your PCM is not in way! Connector on the OBD connector everything seems tight and in-tack being output by the PCM will never diagnostic! X27 ; s a 2008 5.4L 130k easy kilometers on it and it seems it is possible to get valuable... You can communicate with different modules can confirm operation and the Cloudflare Ray ID found at the bottom this... On, but the reality is that only the five-volt reference is missing is to see the waveforms are!