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. ATF is considered the most complex lubricating oil in the vehicle because the demands are so great for it to function in a wide variety of conditions. This can be performed by using the OBDII connector. All grounds on PCM harness are good. My Toyota dealer told me that about my ABS computer on my Tacoma. There is a posting about it. All started at the same time. The same is true for an open or short to ground. **No Bus Activity! Oct 14, 2013 #2 Patrick Feeley Member Joined Im working on a buddy of mines truck, trying to figure out why the pcm has no communication. PCM files have the best sound quality of all the available sound formats. No start. But I might be confusing myself with something else, that isn't to tuff to do. cond. The PCM has to be replaced anyway, so I would do it now and then move on to the engine problem. Code reader cannot connect. This ECU is used and a CORE, scanner reads, "can not communicate.". Content on odyclub.com is generated by its users. If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. Currently at 83K. When this communication is disrupted, it can cause all sorts of problems. Dodge Ram owners have been having problems with their trucks PCMs for years. 3 row seating. I've tried reseating all the connectors on pcm nothing happened also check the park brake area everything seems tight and in-tack. Mar 11, 2014 (Edited by Moderator) I have an 04 Sierra and the OBDII port doesn't want to communicate with the computer when a scanner or programmer is hooked up. $294.90 . Went to start it couple days later nothing. The ecm needed a reflash to get the truck back up and going. Learning how to perform drivetrain diagnostics and in-the-car repairs is important. In this video I will show you how to fix your no start/no communication issue on your 2002(and other years same as this model) Isuzu Rodeo/Honda Passport(oops I said Pilot in the video sorry!!) No communication from PCM. Same thing at Autozone. online007 is online now Continue Related GMC Questions Thanks, This can be performed by using the OBDII connector. Finally, its also possible that there is an issue with the trucks ECU (engine control unit). Testing the ports on the obd connector everything seems to be correct. I Was Driving My Van Yesterday, And It Was Running Fine, When All At Once The Message Center Displayed "fuel Computer Data Error." So my 6.7 left me hanging the other day, went to start nothing. This will allow you to see the waveforms that are being output by the PCM, which can be helpful in diagnosing any issues. The stock gauges quit working, check gauges, my cts2 lost communications with the truck, all wiring appeared fine. There are a few possible causes of this problem, but the most likely one is a faulty ground wire. 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. Continue with Recommended Cookies. This might look like a dead ECM, but the reality is that only the five-volt reference is missing. Welcome to the Flagship One Official Blog TOP worldwide Engine Computer & Control Module supplier. ecm, pcm, bcm, tcm, gauges, and overhead console. -Check for voltage pin3 CanC+ ABS harness side *With the ignition key ON and bus activity (BA), the voltage should vary from 0 to 5V depending on the amount of bus activity! Why The P0136 Trouble Code Matter and Should You Care? However, these changes have not completely eliminated the problem. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. It works on all of my other vehicles. Turned out after quite some time I figured out there was nothing wrong with it. with the PCM, I can talk to everything else. (Merged). Can anybody go into more detail on this repair? No communication with PCM If this is your first visit, be sure to check out the FAQ by clicking the link above. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. Contact Us - You notice a decrease in fuel economy. Bill, TEST 5: Connect positive DMM lead to either bias pin 2 or 10 and connect negative lead to the ground terminal. Manage Settings Cleaned Intake. The fuse was bad all fixed thank you. It powers on the scanner but the scanner says there is no communications. Cheers! Please register or login to enable Dark Mode. I'm all set - someone on another forum answered pretty quick. Had a guy with a confirmed good ecu come out today, still nothing, no communication. I swapped PCM from an identical year F350 w/7.3 that was running and I was able to scan. Using the wrong oil is a common problem that causes a vehicles timing chain to wear even quicker. Thursday, June 11th, 2020 AT 1:52 PM 2. I towed the car to the dealership and they are saying that they can't communicate with the PCM. The first and most common way is to use a code reader or scanner. 2013 Ford Escape Problems You Need To Know About. Checked fuses, swapped IPDMs with another car. 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. One possibility is that there is simply a loose connection between the PCM and the trucks wiring harness. 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. The solder that connects the components to the circuit board can also fail. Their assessment is that the PCM has failed and that I need to have it checked out at the local dealership. Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more. 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. And I would get a second opinion first. On older throttle cable systems, the carburetor or fuel injection system reacted to the throttle angle. SKREEM codes: PCM Status Failure ABS codes: Lost communication with ECM/PCM; Lost Communication with TCM; Implausible data; Implausible vehicle configuration; Original VIN mismatch / Missing I have pinned out the OBD Pin 2 to the engine harness and there is continuity. With this reader I can only delete the error codes not reset them. Have you checked all your fuses with a test light? Do you use the parking brake often? Jan 5, 2013. TEST 3: Voltage check on DLC pin 2. This should fit all Saab 9-3 from 2003-2007 and may fit up to 2011. Replaced the PCM with a reman unit at the discount car parts place for 125 buck and works fine. I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. Here are some tips to follow when replacing a spark plug. These four circuits work together to allow the module to think, communicate, feel and act. In early model Rams, the PCM was known to fail prematurely. Both confirmed all fuses were in working order and that power is running to the unit. Damage can occur to the solid-state circuitry inside, including microchips, transistors, resistors or capacitors. Save my name, email, and website in this browser for the next time I comment. It loses comm. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. If neither of these work, you may need to replace the PCM itself. I believe there was a posting about how the wire bundle on the bracket for the parking brake starts acting up. For example if an un-programmed PCM is installed and then it's able to communicate via the ODB2 port it almost proves a bad PCM. 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. 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 The following concerns may be caused by an improperly seated exhaust system. repaired the break and started up no problem. To start viewing messages, select the forum that you want to visit from the selection below. I tried to check it with my OBDII Scanner. PCM is receiving 12v in start/run In some cases, the transmission would also slip or shift erratically. Some have even had to replace the entire unit. First the heat stopped working (have not fixed yet, but have bought a heater control valve to se if that fixes the problem), then squealing so I put a new serpentine belt on and the squealing stopped. All of these circuits inside the module can be damaged by heat and vibration. 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? - U100 Class 2 Serial Communication Problem (Current) 9. Pigtail wiring included for your convivence. NOTE: An open circuit or high ground resistance means that the PCM will never enter diagnostic mode. This can cause all sorts of problems, including engine stalling and poor fuel economy. All of the scan tools power up as if the port is working but can't connect. It's very simple to fix and all you really need is a razor blade or something sharp and a small flat head screw driver or pick.To Purchase Tools I Love and Use Everyday:Genius Standard and Metric 3/8 Deep and Short Socket Sethttps://goo.gl/amuNW8Bostitch 1/4\" impact driverhttps://goo.gl/32VGmBImpact Driver Socket Adaptor Sethttps://goo.gl/ebcTo34 PC PICK AND HOOK SEThttps://goo.gl/wb1Nq8Genius Tools IE-2349 1/4\", 3/8\" \u0026 1/2\" Drive Impact Extension Bar Set, 9-Piecehttps://goo.gl/EQqKGnI hope you enjoyed this video. Defects in original equipment ECMs are identified and corrective action is taken to upgrade and improve the units. Never had to use it on the van before. Ended up finding a broken wire inside of the battery junction box that connects fuse 72 to pcm power relay. Truck still wont start , tried to scan but says , no communication , also wait to start lights doesnt come on. Trouble Area. U0100. Fuses #9 and #22 are good No chips or modes I did a 'pin out' on the PCM: With ignition off pin 55 has 12v I am thinking to check the fuses. Pin 16 is the positive voltage side being supplied to the ECM. 1. 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. How To Reset Your Jeep ECM (Engine Control Module), 2004 Jeep Liberty Problems To Keep In Mind, 2010 Ford Fusion Problems To Keep In Mind, The Coolest Home Decor For Auto Enthusiasts. attempted installing the tuner and the tuner cannot communicate with the PCM to tune it. 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. Archive - Also when driving the van the overdrive is still working, Thursday, June 11th, 2020 AT 1:44 PM Fixed 2004 Chevy Silverado 1500 no communication with modules but power to the obd2 port. The data bus is what allows communication between different modules and systems in your vehicle. When key is turned to run no glow plug light, no fuel pump prime. Have you checked the in cab fuses? 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 If the PCM needs to be reprogrammed, its a simple process that can be done by any qualified mechanic. Most generic scanners won't communicate with these trucks. 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. First I have a 2002 Ford Windstar SE van, with a 3.8 liter motor. 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. Reconnect the negative battery cable and start up the truck to see if the problem has been fixed. 3.108.155.32 I'd check connections. Before you take your truck in for service, be sure to ask about the cost of reprogramming the PCM. Plus my ABS light comes on every now and then, but not very often. If you repair the short in the sensor or harness, and maybe replace a fuse, the five-volt reference signal should return. I have a 2011 F150 that will not start at times, easily duplicated in the bay. Second, communication circuits allow the module to communicate on the networks of the vehicle with other modules. Connecting an OBD-II scanner gives the code U0100 Lost Communication With ECM/PCM "A". It could be as simple as a coolant temperature sensor, or as complex as a mass airflow sensor. When I pulled out the PCM it was very crusty and had rust marks coming out of it. It showed MIL Status: ON with 127 codes. I took it to my independent Honda shop. LOL. They just didn't know what they were doing. 2006 Ford Five Hundred Problems To Keep In Mind, The P0132 Trouble Code, How To Deal With It, Difference Between A Bad Alternator Vs Bad Battery. Connect positive DMM lead to DLC Battery + terminal Connect negative DMM lead to battery ground terminal, This tests the ECM Voltage supply as no power may be caused by a blown lighter fuse, TEST 5: Connect positive DMM lead to either DLC bias terminals Connect negative DMM lead to the ground terminal, With the ignition key ON and no bus activity, BUS + should read 0V BUS should read 5V. They said they can replace it but they are not able to . document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Goodyear Wrangler Ultraterrain At Vs Bfg Ko2, What Transmission is in a 2003 Dodge Ram 1500, 2019 Ram 1500 Front Suspension Torque Specs, 2001 Dodge Ram 1500 Acceleration Problems, Dodge Ram 1500 Rear Differential Fluid Capacity. So, again, the communication issue could be with the sensor or actuator, or the problem could be on the modules circuit board. What to do if the OBD II scanner doesnt communicate with the vehicle. Shutting off. 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. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules. You should hear both the PCM relay and the glow plug relay click. With any communication network, the resistance in the circuit, resulting voltage and circuit condition can determine if information is being communicated with other modules. First, you have the circuits and components that process and compute. Hello everyone, Looking for some ideas on what I may be missing. Ford: 00-1-2: Parking Brake Control Assembly Concerns: Ford: 00-12-2 (DTC) - P1635 And/Or P1639 Present After Powertrain Control Module ( PCM) Or Instrument Cluster Replacement. This can be a major problem, as the PCM is responsible for controlling many of the trucks functions, including engine performance and emissions. You need to test fuse #17 here is a guide to help with the fuse locations and the OBD2 wiring so you can see how it works. If there is high resistance in a module or part of the wiring harness it can bring down the network. When it comes time to reprogram the PCM (powertrain control module) in your Dodge Ram, there are a few things you need to know. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. We and our partners use cookies to Store and/or access information on a device. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Dodge Ram trucks are built tough, but like any other vehicle, they need regular maintenance and occasional repairs. . Helga Melgar, MBA, PCM-Marketing Management AMA certified marketing and communications professional I had that problem with another ford, but similar pcm. Engine light blinking. Each time, I recieved a "Link Error" message. Has anyone run into this problem. No hesitation or running issues, just cut out and no restart. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. Do you have the same problem? Yes No Tuesday, July 17th, 2018 AT 12:45 PM 10 Replies ASEMASTER6371 EXPERT Good evening. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? When it does not start I have no comm. The other type of communication issue could be with a sensor or actuator. They need to be checked. These circuits also house the software or firmware that is the operating system for the module. Pigtail wiring included for your convivence. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Please No Off Topic. Once that all passes, you'll need to check for power at the PCM connector itself. An example of data being processed may be a unique identifier stored in a cookie. If there is a problem with the PCM, the vehicle may not run properly or at all. I came to the conclusion that PCM was bad. Your Samsung TV is able to play PCM files. U0100 no communication with pcm. I notice it because last year I had the same problem with my 2014 6.7. If the WTS returns with it unplugged you now have to find which bad sensor is doing this (most often the EBP sensor). 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. Since its inception, the Ram 1500 has been plagued with PCM problems. Simple check for power to the PCM relay - remove fuse #22 and turn the key to RUN. 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 Coach2market srl is a training and management firm focusing on personal and organizational development. On some vehicles, the wires for pins 4 and 5 attach at the same point of the body. Scan tool will not communicate with pcm. Many Ram owners continue to experience premature failures of their powertrain control modules. All the fuse in the 2 fuse box are OK I have 12 volts at C1 pin 11, 29 and 30. Often, the connector can be damaged if the scan tool or code reader has been pushed in and out frequently. 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" Thanks guys. Installed in 2022. Also, if the ECM is replaced, the shorted circuit can damage the new module. If there is a problem with the PCM, the vehicle may not run properly or at all. They will be able to diagnose the problem and get your car back up and running again. Don't know anything about the torque App so no help there. If the power, ground, and all fuses have been confirmed, with no communication then a bad PCM needs to be considered. Thank you very much for helping me. In later model years, Dodge made a number of changes to try and improve the reliability of the PCM. Turning the key in the ignition gives no crank and no click of the starter solenoid because the ECM is not telling it to start. 4. In this video I will show you how to fix your no start/no communication issue on your 2002 (and other years same as this model) Isuzu Rodeo/Honda Passport (oops I said Pilot in the video. If youre experiencing the No Bus error message, its important to take your car to a qualified mechanic as soon as possible. Tried 2 new Batteries nothing. Usually the female side of the connector is forced out of the back of the connector on the vehicle. Please LIKE, COMMENT, SHARE AND SUBSCRIBE!!! Heres why new filters are better. Whatever the original problem is, leaving it unfixed could cause cascading problems. Cookie Policy - 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. -Check for Ground ABS-Module Harness Side pin 16,45 Ground O.K. Next, try resetting the PCM by disconnecting the battery for 30 seconds. If the PCM doesn't communicate yet all other modules do it's either due to internal PCM failure, a loss of power or ground to it, or a bus issue only affecting the PCM. Jump the plug by right battery starter turns. No dvd player. The action you just performed triggered the security solution. The problem was the Climate Control. If you own a Dodge Ram 1500 and have experienced PCM problems, you may be entitled to financial compensation from Chrysler. This can be easily fixed by checking all of the connections and making sure they are tight. Go back under the hood and install fuse #22. Most ECMs are not plug and play parts. Many new parts. Test 3, which terminal is for serial data? 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. BCM-Module U0100 Lost Communication With ECM/PCM Diagnostics Begins: ABS-Module Tool used: Incandescent Test light -Check for power ABS-Module Harness Side Pin. in the lighting in the cab. On vehicles with the digital odometer a message saying "NO BUS" would come up which means the PCM is bad and needs to be replaced for proper vehicle . [/cmsmasters_text][/cmsmasters_column][/cmsmasters_row], TFor 2008 FX35 Infinit 3,5L Finally, another option for testing the PCM is through the use of a multimeter. The other day he was driving it like it was normal went to the store and some other places then came home and his truck would start up but then it died and won't start again, will crank but no start. The PCM is the computer that controls the engine, transmission and other systems in the vehicle. Proper voltages and Ohms. Nice work, we are here to help, please use 2CarPros anytime. with a 3.2L engine. If scanner will not communicate with PCM and fuses are good, you may have a bad PCM. Engine timing is critical for overall performance. On earlier vehicles my understanding is that they won't shut the vehicle down completely as they're not entirely electronically controlled. 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. Last year my truck got struck by lightning. The engine runs erratically, or Rough idling/misfiring. After several aggravating (expensive) attempts at resolving this issue I finally traded it back to another Ford dealer. If it reads 120 ohms, you know that a module is no longer present and the CAN bus and the network will be down. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. Have you been able to check codes with your OBDII scanner on your 2007 Ody before? 94.5 and early 95 were not OBD compliant and needed a PCM flash upgrade to be so. PCM is a digital representation of analog sound wave, and it reproduces the properties of the analog sound wave as closely as possible. If you own a Dodge Ram and are having trouble with communication between your PCM and other parts of the vehicle, there are a few things you can do to try and fix the issue. Do not connect to the body or chassis ground but to the battery terminal directly. 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. I checked the dlc for power and ground and network voltage all passing. Like the other computers (known as modules) onboard your vehicle, the PCM communicates over a bus. I get a code U0140 LOST COMMUNICATION WITH BODY. battery is new. Has anyone ever had this problem? Here are some other symptoms that may indicate your Rams PCM has failed: I Have Driven The Car Without Issue For 1000kms Over The Last Month. You may have to register before you can post: click the register link above to proceed. You could try the local yunk yards, but Ford will have to flash the PCM with correct VIN. Test 5, which terminal is bias terminal? What year is your truck? Your Ram is having difficulty shifting gears, or its slipping out of gear while driving. Its usually labeled PCM or ECU. Pull it out and wait a few minutes before putting it back in. Apr 13, 2011 HELP Jeep is acting out. 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. all Acessories Off. ' " It is triggered once there is a loss of communication between your PCM and a particular module. But, a lot of the damage to an ECM comes from the connected components. Yes No Saturday, February 6th, 2016 AT 8:06 AM 18 Replies WRENCHTECH EXPERT Have you checked all your fuses with a test light? Pin 16 is the positive voltage side being supplied to the ECM. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'truckguider_com-medrectangle-4','ezslot_4',104,'0','0'])};__ez_fad_position('div-gpt-ad-truckguider_com-medrectangle-4-0');If you see the No Bus error message on your Dodge Ram 1500, it means that there is an issue with the data bus. Dodge ram no communication with pcm dodge ram 1500 pcm reset 1998 Dodge Ram 1500 SLT | Cars & Trucks | St. Albert | Kijiji. The engine will not start, or it starts and then stalls. It monitors many different engine and transmission parameters and makes adjustments to ensure optimal performance. I have a 2009 3500 with the auto 6 transmission. 2004 - 2008 Ford F150 - No crank and can't communicate with PCM - My pickup has been at a dealership for over three weeks and the techs and engineers at ford are stumped. The founder of coach2market is an ex-VP Europe at General Electric & Procter & Gamble. 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? Fuel Ask an Expert Car Questions GMC Questions online007, ASE Certified Technician 1,982 Satisfied Customers I have over 30 years hands on experance, A6,A8,L1 certified as well. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'truckguider_com-leader-2','ezslot_7',113,'0','0'])};__ez_fad_position('div-gpt-ad-truckguider_com-leader-2-0');If your Dodge Ram is having trouble starting, stalling, or running rough, it could be a sign of a bad PCM. You can just see the break in the fuse, just off the left leg. There is a communication bus line from the data link connector that could be the issue or it could be the PCM. With the ignition on, the voltage drop across the ground terminal should be 0.1 Volts or less. Door Module - Passenger - 0 codes (History) Scap-On scanner says the following modules exist but can not communicate with or read any data from 1. The simplest way to do that is to Open the 42pin connector over the dr side valvecover. Terms of Service - Here is a recent thread with some good information on setup that might help QUOTE=Hussler;15778150]Don't know anything about the torque App so no help there. Is the Check Engine Light illuminated? and then will be a no crank if I rotate the key back to start. 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 The wires for pins 4 and 5 attach at the local yunk yards but... Ad and content, ad and content, ad and content measurement, audience insights and product.! Comes on every now and then move on to the conclusion that PCM was known to fail prematurely battery and! All set - someone on another forum answered pretty quick or short to ground a reader... Help, please use 2CarPros anytime throttle angle still wont start, as! If scanner will not start at times, easily duplicated in the or... Junction box that connects fuse 72 to PCM power relay to tuff to.... Connector that could be the PCM, the carburetor or fuel injection system reacted to the.... The wires for pins 4 and 5 attach at the PCM is a digital representation of sound... I rotate the key back to start viewing messages, select the forum that want... A & quot ; can not communicate with a module, but not often... Acting out Ford Escape problems you need to check for power at the discount car parts place for buck... Maybe replace a fuse, the PCM communicates over a bus gears, or its slipping of! Mass airflow sensor check on DLC pin 2 hanging the other computers ( as... Take your car back up and running again problem, but not often. Allows communication between your PCM and fuses are good, you can communicate with a test light -check for ABS-Module. Quality of all the connectors on PCM nothing happened also check the park brake area everything seems tight and.... Output by the PCM was bad repair the short in the 2 fuse are. Test 5: connect positive DMM lead to either bias pin 2 on to the solid-state circuitry inside, engine... This repair do not Sell or Share my Personal information, https //www.ford-trucks.com/forums/1ont-start.html. To ask about the torque App so no help there communications with the ignition on, carburetor! Truck to see if the power, ground, and website in this video help there should... The properties of the connector is forced out of it 3.108.155.32 I & # x27 ; d check connections cascading. Expert good evening plug relay click a disservice going 3.73 over 4.30 on 7.3L gas dually problems... In a cookie with correct VIN error codes not reset them there are a few before... The parking brake starts acting up Cloudflare Ray ID found at the PCM reliability of the vehicle working can. Process and compute high ground resistance means that the PCM was known to prematurely. Also, if the problem the units for property damage or injury incurred as a temperature... Page for page lectures taken right from my book as well as exclusive classroom case! Know about General Electric & amp ; Procter & amp ; Procter & amp ; Gamble to tuff do! Once there is a digital representation of analog sound wave, and website in this browser for the brake., transistors, resistors or capacitors and out frequently to the engine, transmission other... With my OBDII scanner confusing myself with something else, that is the positive voltage being. Powers on the vehicle of all the connectors on PCM nothing happened also check the park brake area seems! This problem, but the information contained in this browser for the module communicate... All sorts of problems a PCM flash upgrade to be replaced anyway, so I would do it now then! However, these changes have not completely eliminated the problem by clicking the link above EXPERT good evening sensor. Harness side pin the cost of reprogramming the PCM relay and the trucks wiring harness it can all! Sell or Share my Personal information, https: //www.ford-trucks.com/forums/1ont-start.html and occasional repairs own a dodge Ram 1500 has pushed! Changes have not completely eliminated the problem and get your car back up and going key back to Ford. Of errors, you can post: no communication with pcm the register link above proceed... Pcm problems, you & # x27 ; & quot ; book well! That PCM was known to fail prematurely female side of the wiring harness can... Just see the waveforms that are being output by the PCM car to the junction! On this repair wire bundle on the van before gear while driving leaving... Replace it but they are saying that they can replace it but they are tight back under the hood install. Sensor or actuator Ody before online007 is online now Continue Related GMC Questions Thanks, this can be by... Install fuse # 22 that causes a vehicles timing chain to wear even quicker & # x27 ; need! Abs computer on my Tacoma left me hanging the other computers ( known as modules ) onboard your.... Same is true for an open or short to ground happened also check the brake! Van before no restart easiest tests to perform drivetrain diagnostics and in-the-car repairs is important voltage! And/Or access information on a device 2002 Ford Windstar SE van, with a 3.8 liter motor 10 and negative. Means that the PCM has to be correct if I rotate the key to! So my 6.7 left me hanging the other type of communication issue could as. The parking brake starts acting up pin 16,45 ground O.K all of the vehicle may not run properly at... You will find page for page lectures taken right from my book as as! Email, and all fuses have been having problems with their trucks PCMs for years one of the analog wave! A common problem that causes a vehicles timing chain to wear even quicker to wear even quicker truck, wiring... Trucks ECU ( engine control unit ) be correct the simplest way do! Bus line from the selection below no communication with pcm from a sensor is missing or implausible quality of all available! Note: an open circuit or high ground resistance means that the PCM relay - remove #... Are good, you may no communication with pcm missing drop across the ground terminal transmission... Chain to wear even quicker work together to allow the module it checked out at the same with. Error message, its also possible that there is simply a loose connection between PCM... When it does not start I have 12 volts at C1 pin 11, 29 and 30 later model,. Out today, still nothing, no fuel pump prime negative lead to either pin! At General Electric & amp ; Gamble out of it all set - someone on another forum answered quick! Pin 16 is the operating system for the next time I figured out there was nothing with... Experienced PCM problems equipment ECMs are identified and corrective action is taken to upgrade and improve the of. Ecms are identified and corrective action is taken to upgrade and improve the units up as if the is... Best sound quality of all the fuse in the fuse, just off the left leg the on! Their powertrain control modules that controls the engine problem with something else, that is n't to tuff to if. Few possible causes of this page came up and running again be with module... C1 pin 11, 29 and 30 to try and improve the reliability of the scan tool or code or..., all wiring appeared fine pull it out and wait a few possible causes of no communication with pcm,. Move no communication with pcm to the ground terminal should be 0.1 volts or less can all! Ecu come out today, still nothing, no communication, also to..., and website in this video ABS-Module harness side pin 16,45 ground O.K any of the.. The computer that controls the engine problem original equipment ECMs are identified and corrective action is taken upgrade! Is disrupted, it can bring down the network a vehicles timing to... Some vehicles, the transmission would also slip or shift erratically ABS computer on Tacoma! Swapped PCM from an identical year F350 w/7.3 that was running and I was able to scan but says no! But they are saying that they can replace it but they are not able.... A guy with a reman unit at the same is true for an open short. Number of changes to try and improve the units you have the sound... The OBD connector everything seems tight and in-tack to either bias pin 2 delete! My OBDII scanner on your 2007 Ody before then stalls auto 6 transmission scanner no communication with pcm the code U0100 communication... Seems tight and in-tack from 2003-2007 and may fit up to 2011 when it does not start at times easily! Using the OBDII connector is running to the unit audience insights and product development Ody?... A code reader or scanner product development circuit or high ground resistance means that the PCM and. In this browser for the parking brake starts acting up professional I had the same true! Battery cable and start up the truck to see if there is no communications is for Serial data unfixed cause! Ecm is replaced, the Ram 1500 has been pushed in and out frequently a problem. On with 127 codes seems tight and in-tack certified marketing and communications I. Or firmware that is the positive voltage side being supplied to the ECM is replaced the! Regular maintenance and occasional repairs working, check gauges, my cts2 Lost communications with the PCM by disconnecting battery. Messages, select the forum that you want to visit from the data link connector could. Of errors, you & # x27 ; ll need to have it checked at... Know what they were doing when this page came up and the trucks ECU engine! But they are tight check out the PCM by disconnecting the battery junction that!
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