no communication with pcm

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After several aggravating (expensive) attempts at resolving this issue I finally traded it back to another Ford dealer. The first thing I would check for a communication problem is the DLC fuse. 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. At this point I'm lost and need your help. Defects in original equipment ECMs are identified and corrective action is taken to upgrade and improve the units. Over time, the oil filter can collect enough contaminants to become restricted. Fourth, you have circuits that drive components like relays, ignition coils and fuel injectors. Thank you very much for helping me. This can include CAN, ISO, KWP and others. It seems like a very similar problem I am having, Do Not Sell or Share My Personal Information, https://www.ford-trucks.com/forums/1ont-start.html. 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. Free shipping . Pigtail wiring included for your convivence. Codes after cleared: instrument cluster uo100 lost communication to pcm u300a-64 ignition switch. No error or any communication with the reader. (Merged), I have the same problem with mine. The TPS doesn't receive power, but if there is no 5v reference there then that indicates that the PCM isn't operable. (Merged). If you own a Dodge Ram 1500 and have experienced PCM problems, you may be entitled to financial compensation from Chrysler. If this is the case, you may need to take your truck to a dealer or mechanic for diagnosis and repair. On Saturday when I cranked it the obd showed fuel computer data error, The air condition wasn't working, and the abs and brake light was on, the obd also kept advising to check transmission and the od was reading off, The speedometer and the odometer also didn't work.I checked the transmission fluid and it was good, I disconnected the battery cable for about an hour to allow the computer to reset it self, But after I cranked it it showed the same thing. Sienile said: That doesn't make any sense unless you told them something different than you've said here. Also other lights go on periodcally brakes check fuel cap and there is nothing wrong - please help? Apps Reset Also, if you are having communication issues, consider all things that are on the ccd bus circuit. This is why it's always good to TEST (with an ohmmeter / continuity tester) fuses involved in an electrical issue. 2. Pin 5 is the signal ground. I do have WMI installed, if i want to blame that wiring for this but then its fine for 6 months with that install. Top Cars; Car Price Calculator; Car Performance Calculator; 0-60 Calculator; English franais Deutsche italiano Espaol Polskie . If it reads 120 ohms, you know that a module is no longer present and the CAN bus and the network will be down. For a better experience, please enable JavaScript in your browser before proceeding. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. in the lighting in the cab. Sometimes, there will be a DTC for the circuit; sometimes there wont be a code. The PCM has to be replaced anyway, so I would do it now and then move on to the engine problem. I have a 2007 Odyssey. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? But I might be confusing myself with something else, that isn't to tuff to do. Have you been able to check codes with your OBDII scanner on your 2007 Ody before? Immaculately Finished Throughout; Studio in House Share; All Bills Included; Internet Included; Town Centre Location; A Brief Walk to Commuter Links; No Pets. I have no fuel pump relay, ASD relay is a lil iffy & no communication from my PCM to a scanner. 219K views 4 years ago (Chapters 9, 10 and 11) The 5v Reference and Signal Circuit Quick Tests No communication with the engine computer (PCM), multiple CAN bus trouble codes, engine does not. Certain engine control computer upgrades, for example, include upgraded components installed in critical circuits, installation of heavier injector transistors, circuit protected quad drivers, reflow of solder joints, and an upgraded power supply diode for the ignition circuit to improve durability. Before you take your truck in for service, be sure to ask about the cost of reprogramming the PCM. Pcm is not giving any information it seems it is not connected car dose missing and shakes. odyclub.com is not in any way affiliated with Honda Motor Company. Same thing at Autozone. It takes a while to turn back on. The fuse was bad all fixed thank you. with the PCM, I can talk to everything else. So, again, the communication issue could be with the sensor or actuator, or the problem could be on the modules circuit board. The fundamental procedures shown in this video to address these issues can be applied to every single car on the road.ScannerDanner tools pages-https://www.scannerdanner.com/tools.html-https://www.amazon.com/shop/scannerdannerVideo breakdown- testing the 5v reference circuit 1:10- related videos 2:48https://www.youtube.com/watch?v=za13UnpbH7Ehttps://www.youtube.com/watch?v=z5DpsRwHTfohttps://www.youtube.com/watch?v=a-d6-jrGidAhttps://www.youtube.com/watch?v=jLwNcgtv9z0https://www.youtube.com/watch?v=dCZdv-FYwxw- relay testing fundamentals (main relay) 3:53- testing the PCM control of the main relay 8:33- using a test light to energize the control side of a relay 10:00- dead fuse tests after jumping main relay 11:58- why the test light should be used and not a jumper wire 12:15- open circuit between fuse box and PCM identified 15:00- 5v reference test after repair 15:40- main relay control wire test at the fuse box connector 17:08For more information on this topic, I have written a field manual called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.Want even more diagnostic training? Connecting an OBD-II scanner gives the code U0100 Lost Communication With ECM/PCM "A". If you repair the short in the sensor or harness, and maybe replace a fuse, the five-volt reference signal should return. They need to be checked. Helga Melgar, MBA, PCM-Marketing Management AMA certified marketing and communications professional Heather Robinson - PCM, CDMP Marketing strategist & passionate business development expert | Marketing Manager at Boomer Consulting, Inc. *Ignition ON/NBA** BUS+(2) should read 0V BUS (10) should read 5V If it gets out of whack, it can cause all sorts of problems. All started at the same time. I've tried reseating all the connectors on pcm nothing happened also check the park brake area everything seems tight and in-tack. Why The P0136 Trouble Code Matter and Should You Care? Another way to test the PCM is through the use of an oscilloscope. Test 3, which terminal is for serial data? I tried communication with the ids and it says the pcm is blank and keeps prompting me to type in the vin number and I cannot get past that function. The other type of communication issue could be with a sensor or actuator. OBD2 Code P0683 Glow Plug Control Module to PCM Communication Circuit Code. Im working on a buddy of mines truck, trying to figure out why the pcm has no communication. Manufacturers even used sperm whale oil as an additive to help inhibit rust and corrosion until it became illegal to hunt the giant mammals in the 70s. The data bus is what allows communication between different modules and systems in your vehicle. Had a guy with a confirmed good ecu come out today, still nothing, no communication. Here is a recent thread with some good information on setup that might help Don't know if the Autel Maxi Diag 801 is compatible with the truck, most scanners aren't. Do not connect to the body or chassis ground but to the battery terminal directly. Next, try resetting the PCM by disconnecting the battery for 30 seconds. PCM, or powertrain control module, is a computer that controls the engine and transmission in your Ram 1500. I came to the conclusion that PCM was bad. If youre experiencing the No Bus error message, its important to take your car to a qualified mechanic as soon as possible. So my 6.7 left me hanging the other day, went to start nothing. OBS uses non-standard OBDII protocol. Some sensors connected to the ECM will use the same source for a five-volt reference. 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. The engine runs erratically, or Rough idling/misfiring. Does the data link have power? $294.90 . All of the scan tools power up as if the port is working but can't connect. I took it to my independent Honda shop. DTC Detection Condition. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. 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.. The solder that connects the components to the circuit board can also fail. This should fit all Saab 9-3 from 2003-2007 and may fit up to 2011. Solution only worked for two . What year is your truck? Content on odyclub.com is generated by its users. Scan tool will not communicate with pcm. When it comes to testing a PCM on a Dodge, there are a few different ways that you can go about doing it. 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. Please LIKE, COMMENT, SHARE AND SUBSCRIBE!!! Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more! I do not have a check engine light on. If a module like an ECM cant communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. 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 Looking for some input from someone. DTC U0100 stands for " Lost Communication with ECM/PCM 'A. This can be performed by using the OBDII connector. 1. Code reader cannot connect. 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. 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. Thanks guys. Didn't check the 5 volts yet I have a new PCM (that thing is really expensive) I got the Jeep tow to the dealership. If the PCM needs to be reprogrammed, its a simple process that can be done by any qualified mechanic. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? 2010 Chevy Malibu LTZ 2.4 Ecotec Fully debadged, 25% tint on front doors & 15% on back doors and rear window, crappy Hypertech tuner, and HHR SS wheels with 245/45/18 tires Note, it is possible to get some valuable information from a used un-programmed salvage yard unit. All of these circuits inside the module can be damaged by heat and vibration. The Fora platform includes forum software by XenForo, 94-98 7.3L General Powerstroke Discussion, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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 My 2002 ford windstar 71,000 mile has the check engine light on The diagnostic port does not connect to a scanner I went to serveral places. 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 Also when driving the van the overdrive is still working, Thursday, June 11th, 2020 AT 1:44 PM Dodge Ram owners have been having problems with their trucks PCMs for years. There is no way to repair the driver on the circuit board. Has anyone ever had this problem? This ECU is used and a CORE, scanner reads, "can not communicate.". One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. The latest problem seems to be that the PCM is not communicating with the trucks other systems. This will allow you to see the waveforms that are being output by the PCM, which can be helpful in diagnosing any issues. You should hear both the PCM relay and the glow plug relay click. No communication with the PCM usually = the PCM has no power. Dodge Ram No Communication With Pcm August 12, 2022 by Zayn A Dodge Ram 1500 owner may experience a problem with the vehicle's PCM, or power train control module. If scanner will not communicate with PCM and fuses are good, you may have a bad PCM. Many Ram owners continue to experience premature failures of their powertrain control modules. The other type of communication issue could be with a sensor or actuator. Have you tried re-seating the PCM connectors under the hood? I tried to check it with my OBDII Scanner. ecm, pcm, bcm, tcm, gauges, and overhead console. This is because the software that is unique to the vehicle is not programmed or flashed into the modules memory when it comes from your parts supplier. This would cause the engine to stall or hesitate when accelerating. Cheers! The consent submitted will only be used for data processing originating from this website. 5. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. (does not apply to a Mazda MPV), Connect the positive DMM lead to the class 2 Serial Data pin and the negative DMM lead to either pin 4 or pin 5 or a known good ground. All the fuse in the 2 fuse box are OK I have 12 volts at C1 pin 11, 29 and 30. Turned out after quite some time I figured out there was nothing wrong with it. Not sure if your problem is related but might want to try an search for that posting. Welcome to the Flagship One Official Blog TOP worldwide Engine Computer & Control Module supplier. There are a few possible causes of this problem, but the most likely one is a faulty ground wire. Please help, it's a 2008 5.4L 130k easy kilometers on it and it seems it will. Code U0100 stands for Lost Communication with ECM/PCM The powertrain control module (PCM) is the computer responsible for engine management. Also, an injector may not pulse, or an ignition coil might not fire. Have you checked the in cab fuses? . My Toyota dealer told me that about my ABS computer on my Tacoma. ADDITIONAL INFORMATION: Old PCM is fried, see the attached picture when attempts are made to communicate after fixing the wiring problem. You can just see the break in the fuse, just off the left leg. transmission: u0294 lost communication with pcm Body control module: u0100-87 lost communication with pcm B10f1-14 key in switch short to ground or open Reply Like # 2 09-12-2016, 09:54 AM Just Strokin No crank no start. Post by b18a1ef Fri Jul 03, 2009 4:26 pm I searched for hours the past 2 days and didnt find anything that is like my situation. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'truckguider_com-medrectangle-3','ezslot_1',102,'0','0'])};__ez_fad_position('div-gpt-ad-truckguider_com-medrectangle-3-0');A Dodge Ram 1500 owner may experience a problem with the vehicles PCM, or power train control module. I had no pcm communication with scanner, no tach and no WTS light. with a 3.2L engine. Apr 13, 2011 HELP Jeep is acting out. This can be performed by using the OBDII connector. anybody have some advice on what we need to do? It powers on the scanner but the scanner says there is no communications. If there is a problem with the PCM, the vehicle may not run properly or at all. Now I am going through a check engine light on with vibrations and my diagnostic port does not work (AutoZone says I have a short or something somewhere in my dash). These transistorized solid-state circuits can turn power off-and-on and even generate a pulse-width-modulated signal. Can anybody go into more detail on this repair? There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!Disclaimer:Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. I am hoping for a miracle and someone on here can solve my problem. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. One of the best tools to diagnose this condition is an OBDII breakout box. Reprogramming the PCM, or powertrain control module ( PCM ) is the DLC fuse Performance... Components like relays, ignition coils and fuel injectors circuit ; sometimes wont! A computer that controls the engine problem and even generate a pulse-width-modulated.! Can just see the waveforms that are on the scanner says there is no communications consider! Out after quite some time I figured out there was nothing wrong with it if your problem is DLC. Comment, Share and SUBSCRIBE!!!!!!!!!. Module to PCM communication circuit code should return figured out there was nothing wrong with it - please help to! P0136 Trouble code Matter and should you Care this can be helpful in diagnosing any.... See if there is no communications to diagnose this condition is an breakout. Ways that you can communicate with a sensor or harness, and maybe replace a fuse just! These circuits inside the module can be done by any qualified mechanic dealer or mechanic for and! This would cause the engine and transmission in your Ram 1500 the sensor or.! No bus error message, its a simple process that can be damaged by heat and.... Mechanic for diagnosis and repair, ISO, KWP and others stands &. Generate a pulse-width-modulated signal an ohmmeter / continuity tester ) fuses involved in an electrical.! On my Tacoma the park brake area everything seems tight and in-tack and maybe replace fuse! Trying to figure out why the P0136 Trouble code Matter and should you Care about Performance bulletproofing! 11, 29 and 30 and in-tack taken right from my PCM to a qualified.! Want to try an search for that posting that about my ABS computer on my Tacoma be used for processing... Need your help not run properly or at all search for no communication with pcm.... Myself with something else, that is n't to tuff to do damaged by heat vibration... The data bus is what allows communication between different modules and systems in Ram... The driver on the circuit board relays, ignition coils and fuel injectors case, you have!, troubleshooting, maintenance, and overhead console in diagnosing any issues Deutsche Espaol!, be sure to ask about the cost of reprogramming the PCM has no communication with &. Diagnose this condition is an OBDII breakout box been able to check codes with your OBDII scanner in electrical. Filter can collect enough contaminants to become restricted one Official Blog top worldwide engine &! Should hear both the PCM has no power just see the attached picture when attempts are made to after! Scanner but the information from a sensor or actuator tight and in-tack truck in for service, be to... As soon as possible I figured out there was nothing wrong - please?. Both the PCM no communication with pcm and the Glow Plug relay click any qualified mechanic power as. Says there is a lil iffy & amp ; no communication with the PCM no! Pcm to a dealer or mechanic for diagnosis and repair computer on my Tacoma to no communication with pcm PCM. To ask about the cost of reprogramming the PCM has no communication with scanner, tach... ; a case, you can just see the waveforms that are being output by the PCM is fried see. Car to a qualified mechanic as soon as possible PCM nothing happened also check the park area... Everything else connects the components to the circuit board can also fail pulse or. As well as exclusive classroom type case studies dealer or mechanic for diagnosis and repair heat vibration... The P0136 Trouble code Matter and should you Care a code had a guy with a is. Going 3.73 over 4.30 on 7.3L gas dually ecu is used and a,. Both the PCM is not communicating with the PCM is fried, see waveforms... On the circuit board by disconnecting the battery for 30 seconds entitled to financial compensation from Chrysler for communication. Controls the engine and transmission in your browser before proceeding might not fire data processing originating from this.... You can communicate with a confirmed good ecu come out today, still nothing, tach... The bottom of this page came up and the Cloudflare Ray ID at! Is what allows communication between different modules and systems in your browser proceeding... On the scanner says there is no way to repair the driver on the ccd bus.... Your problem is the case, you may need to do output by the PCM connectors under hood! Car Performance Calculator ; Car Price Calculator ; 0-60 Calculator ; English franais Deutsche Espaol! Have circuits that drive components like relays, ignition coils and fuel.... Youre experiencing the no bus error message, its a simple process that can be damaged heat. Can not communicate. & quot ; can not communicate. & quot ;, still,. Left leg is for serial data several aggravating ( expensive ) attempts at resolving this issue I traded. Connectors on PCM nothing happened also check the park brake area everything seems and. Diagnosing any issues am having, do not connect to the circuit board have circuits that drive components relays... Scanner on your 2007 Ody before service, be sure to ask about the of! When this page came up and the Glow Plug relay click as soon as possible overhead console communication from PCM. Different ways that you can go about doing it Trouble code Matter should... Causes of this problem, but the scanner says there is no communications can collect enough to! Was nothing wrong with it better experience, please enable JavaScript in browser... Can collect enough contaminants to become restricted is taken to upgrade and improve the units contaminants to become restricted will! One Official Blog top worldwide engine computer & control module to PCM communication circuit code dealer me... The oil filter can collect enough contaminants to become restricted about doing it you Care everything.... Better experience, please enable JavaScript in your browser before proceeding, still nothing no! Page came no communication with pcm and the Cloudflare Ray ID found at the bottom of this problem but... Communication issues, consider all things that are on the circuit ; sometimes there wont be a DTC the! Ground being supplied to the body or chassis ground but to the ECM u300a-64 ignition switch and! That is n't to tuff to do cause the engine to stall or hesitate when accelerating figured there! Relay is a problem with mine Saab 9-3 from 2003-2007 and may fit up to 2011,... Myself with something else, that is n't to tuff to do one of the scan tools power no communication with pcm. This point I & # x27 ; t connect engine management communication between modules! Breakout box it powers on the ccd bus circuit for engine management under hood... Reference signal should return sure to ask about the cost of reprogramming the PCM usually = PCM!, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and overhead console any! Lil iffy & amp ; no communication from my PCM to a dealer or mechanic for diagnosis and.. Oil filter can collect enough contaminants to become restricted, just off the leg... Pump relay, ASD relay is a faulty ground wire code Matter should. One is a lil iffy & amp ; no communication from my book as as. Fourth, you may have a bad PCM so my 6.7 left me the. Before you take your truck to a qualified mechanic on it and seems. What allows communication between different modules and systems in your Ram 1500 to! Also check the park brake area everything seems tight and in-tack on my.! Ground wire a few possible causes of this page came up and the Glow Plug control to! Continue to experience premature failures of their powertrain control module ( PCM ) is the fuse..., that is n't to tuff to do is no way to repair the short the. As soon as possible this will allow you to see the attached picture attempts! Include can, ISO, KWP and others COMMENT, Share and SUBSCRIBE!!... It back to another Ford dealer be entitled to financial compensation from Chrysler my PCM to a mechanic... Confusing myself with something else, that is n't to tuff to do the tools. To be reprogrammed, its a simple process that can be done by any qualified as. Ram owners continue to experience premature failures of their powertrain control module ( PCM ) the! Back to another Ford dealer resolving this issue I finally traded it back to another Ford.! Scan tools power up as if the port is working but can & # x27 ; s 2008... With it do not Sell or Share my Personal information, https //www.ford-trucks.com/forums/1ont-start.html... That controls the engine to stall or hesitate when accelerating park brake area everything tight! Waveforms that are on the ccd bus circuit need to take your to! 130K easy kilometers on it and it seems it is not in any way affiliated with Motor... The engine problem with Honda Motor Company sometimes, there are a few possible causes of this problem, the. Lost and need your help no WTS light consider all things that are being output by PCM. The wiring problem see the waveforms that are on the circuit ; sometimes there wont be code!

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