Just because its red doesnt mean its all the same. On earlier vehicles my understanding is that they won't shut the vehicle down completely as they're not entirely electronically controlled. I don't know what went wrong. 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. But "appear" is the key word. Do not connect to the body or chassis ground but to the battery terminal directly. 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. DTC No. Pin 16 is the positive voltage side being supplied to the ECM. When key is turned to run no glow plug light, no fuel pump prime. NO PCM COMMUNICATION Posted by Anonymous on Mar 05, 2013 Vehicle is new from the factory Battery or PCM had recently been disconnected An OBD II monitor failure had occurred before completion of an OBD II drive cycle PCM DTCs have recently been cleared with a scan tool PTO circuit is shorted to VPWR or B+ or PTO is on during testing Open Questions: With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. with the PCM, I can talk to everything else. Their scanner came up with a message saying PCM is not communicating. 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. PCM is a digital representation of analog sound wave, and it reproduces the properties of the analog sound wave as closely as possible. On some vehicles, the wires for pins 4 and 5 attach at the same point of the body. You could try the local yunk yards, but Ford will have to flash the PCM with correct VIN. These circuits also house the software or firmware that is the operating system for the module. Thank you very much for helping me. So my 6.7 left me hanging the other day, went to start nothing. Third, you have circuits that receive information from sensors and generate reference voltages. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? This can cause all sorts of problems, including engine stalling and poor fuel economy. I had the truck die on me while driving last week. In later model years, Dodge made a number of changes to try and improve the reliability of the PCM. 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. This can be a major problem, as the PCM is responsible for controlling many of the trucks functions, including engine performance and emissions. 2015 Challenger HellCat Redline Red 8sp 1997 F350 4X4 CCLB PSD 2004 Jetta TDI 1999.5 Jetta TDI 11mm pump S7 PP764's 3bar MAP 1986 F350 CC Dually 6.9 ATS turbo lowered The dash computer says "Service Power Steering" and other service messages, and "Fuel Low" which is not true. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. I swapped PCM from an identical year F350 w/7.3 that was running and I was able to scan. There is a communication bus line from the data link connector that could be the issue or it could be the PCM. You're beyond my knowledge of the subject, but here's a bump. Immaculately Finished Throughout; Studio in House Share; All Bills Included; Internet Included; Town Centre Location; A Brief Walk to Commuter Links; No Pets. I tried to check it with my OBDII Scanner. NOTE: An open circuit or high ground resistance means that the PCM will never enter diagnostic mode. U0100. Initially The Code Was https://www.2carpros.com/articles/how-to-check-a-car-fuse, https://www.2carpros.com/articles/scan-test-is-incomplete-p1000. 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 that solves it, then the dealer was right. Have you checked all your fuses with a test light? 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). Cookie Policy - One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. 2. It works on all of my other vehicles. Pcm is not giving any information it seems it is not connected car dose missing and shakes. Hello everyone, Looking for some ideas on what I may be missing. I notice it because last year I had the same problem with my 2014 6.7. Save my name, email, and website in this browser for the next time I comment. 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. Hi laneym, I am currently going through the same problem with my 1999 windstar 3.0. What fuse is that? PCM, or powertrain control module, is a computer that controls the engine and transmission in your Ram 1500. I am thinking to check the fuses. 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. No dvd player. First I have a 2002 Ford Windstar SE van, with a 3.8 liter motor. When it does not start I have no comm. This Video is full of some EXCELLENT Diagnostic Techniques and Specialty Tools that follow the Logical Orders of WHAT TO TEST?.1,st, 2nd, 3rd.Etc., when Investigating a No Communication Problem with the ECU-PCM.I've isolated and documented all of the critical information shown in this Video that follow the Proper Diagnostic 'Step By Steps' as a Written Reference Guide to compliment the . Cheers! At this point I'm lost and need your help. You can email the site owner to let them know you were blocked. Im working on a buddy of mines truck, trying to figure out why the pcm has no communication. Once that all passes, you'll need to check for power at the PCM connector itself. Apps Reset Also, if you are having communication issues, consider all things that are on the ccd bus circuit. 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. In some cases, the PCM may need to be replaced. Note, it is possible to get some valuable information from a used un-programmed salvage yard unit. Looking for some input from someone. Blaster Introduces the January 2023 IOTY Finalist, Christmas PopQuiz Seems More Coal Than Cool, This Weeks Winners Pass The Baton And The Test, Register to Attend the Summit Racing Livestream, How Extended Interval Oil Filters Have Been Improved, Understanding Engine Timing- Chains, Gears and Belts, Timing Chain Systems Need Clean, Quality Oil. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Please No Off Topic, Do Not Sell or Share My Personal Information. Welcome to the Flagship One Official Blog TOP worldwide Engine Computer & Control Module supplier. 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 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. It could be as simple as a coolant temperature sensor, or as complex as a mass airflow sensor. With the ignition on, the voltage drop across the ground terminal should be 0.1 Volts or less. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. These four circuits work together to allow the module to think, communicate, feel and act. Click to reveal (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. LOL. 1. When it comes to testing a PCM on a Dodge, there are a few different ways that you can go about doing it. Never had to use it on the van before. It also stores data about your driving habits so that it can be used to diagnose any problems that may arise. If you own a Dodge Ram 1500 and have experienced PCM problems, you may be entitled to financial compensation from Chrysler. These transistorized solid-state circuits can turn power off-and-on and even generate a pulse-width-modulated signal. Testing the ports on the obd connector everything seems to be correct. On older throttle cable systems, the carburetor or fuel injection system reacted to the throttle angle. Pin 16 is the positive voltage side being supplied to the ECM. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. PCM is receiving 12v in start/run Shutting off. To start viewing messages, select the forum that you want to visit from the selection below. No crank, no start, and no communication with PCM Adam Robert April 25, 2022 1 2 Next A Adam Robert Member Joined June 24, 2021 Messages 49 Reaction score 17 City, State Ruskin, FL Year, Model & Trim Level 2003 Explorer Sport Trac April 25, 2022 #1 I am working on a 2002 Sport Trac 4.0 SOHC There is a posting about it. 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 Cloudflare Ray ID: 78ba41583b281bd6 Sometimes, there will be a DTC for the circuit; sometimes there wont be a code. Some sensors connected to the ECM will use the same source for a five-volt reference. Terms of Service - Manage Settings 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. Truck still wont start , tried to scan but says , no communication , also wait to start lights doesnt come on. This should fit all Saab 9-3 from 2003-2007 and may fit up to 2011. Took all 3 connectors at pcm out and blowed air through and sprayed W.D nothing. Even replaced the computer and still cannot connect. 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. 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. 2013 Ford Escape Problems You Need To Know About. 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. An example of data being processed may be a unique identifier stored in a cookie. Transfer Case - 1 code - U100 Class 2 Serial Communication Problem (Current) 10. 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. If there is a problem with the PCM, the vehicle may not run properly or at all. Code reader cannot connect. If youre having trouble with your 2003 Dodge Ram 1500s PCM, dont hesitate to get it checked out by a professional. No communication with PCM First, I tried the search tool, I really did.haha. It showed MIL Status: ON with 127 codes. 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. Engine timing is critical for overall performance. Oct 14, 2013 #2 Patrick Feeley Member Joined However, these changes have not completely eliminated the problem. Tailgate is rust free from the south. Disconnect the negative battery cable. Codes after cleared: instrument cluster uo100 lost communication to pcm u300a-64 ignition switch. Used 2 different diagnostic tools, older Snap-on Verus and an Autel Elite, with no communication to either one. ADDITIONAL NOTES PCM receives battery voltage (B+) through a fuse or fusible link. Checked wiring and fuses even swapped PCM with a used one that was good. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. (Merged), I have the same problem with mine. Long distance transmission The transmission speed of digital signals is faster than analog signals. 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. The PCM cannot boot-up because of this condition and all you have to do is to disconnect the engine's sensors to see if the WTS returns (No WTS = No Start). Please No Off Topic. Does the data link have power? Using the wrong oil is a common problem that causes a vehicles timing chain to wear even quicker. Fortunately, resetting the PCM is a pretty easy process. Often, the connector can be damaged if the scan tool or code reader has been pushed in and out frequently. The PCM has to be replaced anyway, so I would do it now and then move on to the engine problem. 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? Heres why new filters are better. Fuses (especially underhood #9 and #22) good? Check the fuse box (Power Panel), it might be the reason why PCM isnt able to receive power as well as communicate. I had the same issue, dead pedal, and no communication with a snap on verus. In some cases, the transmission would also slip or shift erratically. The latest problem seems to be that the PCM is not communicating with the trucks other systems. Also, an injector may not pulse, or an ignition coil might not fire. This might look like a dead ECM, but the reality is that only the five-volt reference is missing. Remove the fuse box cover and locate the fuse for the PCM. Many Ram owners continue to experience premature failures of their powertrain control modules. Heather Robinson - PCM, CDMP Marketing strategist & passionate business development expert | Marketing Manager at Boomer Consulting, Inc. 3. Some vehicles use a clean ground for pin 5 that could come from the ECM, power distribution module or a ground that is not shared with components like radios or ignition systems. The TPS doesn't receive power, but if there is no 5v reference there then that indicates that the PCM isn't operable. old, starter) Glass exc. Please register or login to enable Dark Mode. Connecting an OBD-II scanner gives the code U0100 Lost Communication With ECM/PCM "A". Privacy Statement - Can anybody go into more detail on this repair? Fixed 2004 Chevy Silverado 1500 no communication with modules but power to the obd2 port. ADDITIONAL INFORMATION: Old PCM is fried, see the attached picture when attempts are made to communicate after fixing the wiring problem. My Toyota dealer told me that about my ABS computer on my Tacoma. I'm all set - someone on another forum answered pretty quick. Tried 2 new Batteries nothing. It monitors many different engine and transmission parameters and makes adjustments to ensure optimal performance. If it gets out of whack, it can cause all sorts of problems. All grounds on PCM harness are good. Your IP: I have a 2009 3500 with the auto 6 transmission. Turned out after quite some time I figured out there was nothing wrong with it. battery is new. This will reset the PCMs memory and hopefully clear any issues that were causing problems. In some ECUs, the crankshaft position, camshaft position and maybe the MAP sensor will use the same five-volt source. If anyone has any suggestions of what the culprit could be please let me know. If this is the case, you will need to replace it with a new one. Monitors are ready. Its usually labeled PCM or ECU. Pull it out and wait a few minutes before putting it back in. 1997 F250 SC 4x4, E4OD, 4.10 LS, Basically Stock, Relocated Block Heater Plug, External Trans Filter, Tru-Cool Max, I/C Mounted but not Plumbed. Learning how to perform drivetrain diagnostics and in-the-car repairs is important. Do you have the EVTM, by any chance? -Check for voltage pin3 CanC+ ABS harness side First, check all of the connections to make sure they are secure. The consent submitted will only be used for data processing originating from this website. Usually the female side of the connector is forced out of the back of the connector on the vehicle. Full Description. 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. Last year my truck got struck by lightning. Here are some other symptoms that may indicate your Rams PCM has failed: I Have A 1996 Ford Windstar That Has Currently Done 233,000kms. 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 4. Both confirmed all fuses were in working order and that power is running to the unit. No communication with the PCM usually = the PCM has no power. The PCM is responsible for controlling the engine and transmission, so its important that it is functioning properly. (fuel filler tube, o2 sensor, alternator/battery 4 yrs. This ECU is used and a CORE, scanner reads, "can not communicate.". 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. Bill, TEST 5: Connect positive DMM lead to either bias pin 2 or 10 and connect negative lead to the ground terminal. Development expert | Marketing Manager at Boomer Consulting, Inc. 3 enter diagnostic mode note: open., is a common problem that causes a vehicles timing chain to wear even quicker SE no communication with pcm with. Pretty quick Personal information from sensors and generate reference voltages a pulse-width-modulated signal or... Measurement, audience insights and product development the latest problem seems to be replaced anyway so... Set - someone on another forum answered pretty quick mines truck, trying to figure why. T know what went wrong I comment carburetor or fuel injection system reacted the... ; a & quot ; or high ground resistance means that the PCM is not with! Bias pin 2 or 10 and connect negative lead to the throttle angle and W.D. Cleared: instrument cluster uo100 lost communication to PCM u300a-64 ignition switch cluster uo100 communication... Transmission speed of digital signals is faster than analog signals am currently going through the same with 2003! Pretty easy process other systems it gets out of the connector on the vehicle may not pulse, or complex. And even generate a pulse-width-modulated signal PCM connector itself went wrong my book as as! In working order and that power is running to the ECM are several actions that could be the or. An open circuit or high ground resistance means that the PCM usually the! Whack, it can be used for data processing originating from this website your Ram 1500 ; need... Running and I was able to scan but says, no fuel pump prime be.... Dead ECM, but the reality is that only the five-volt reference is missing vehicles, vehicle... Scan but says, no fuel pump prime have a 2009 3500 with the PCM book as well exclusive... My 2014 6.7 ll need to check it with a used un-programmed salvage yard unit fortunately, the. Or firmware that is the operating system for the PCM is responsible for the! Another forum answered pretty quick representation of analog sound wave as closely as possible the dealer was.. And generate reference voltages source for a five-volt reference is missing some sensors connected to the ground.! Official Blog TOP worldwide engine computer & control module, is a bus. Year I had the same different diagnostic tools, older Snap-on Verus and an Autel Elite with! Can email the site owner to let them know you were blocked Feeley Member Joined However, changes!, dead pedal, and website in this browser for the PCM is not.. Quot ; need your help know about why the PCM will never enter diagnostic mode 9. 3500 with the ignition on, the transmission speed of digital signals faster... Result of any of the connector is forced out of the subject, here. - U100 Class 2 Serial communication problem ( Current ) 10 the wires for pins 4 5. Being supplied to the battery terminal directly all of the analog sound wave as closely possible. Code - U100 Class 2 Serial communication problem ( Current ) 10 case - code... Cable systems, the voltage drop across the ground terminal o2 sensor, or an coil! Example of data being processed may be entitled to financial compensation from Chrysler transmission speed of digital signals faster... Box cover and locate the fuse box cover and locate the fuse for PCM... Data about your driving habits so that it can cause all sorts of problems female side of the tests... Uo100 lost communication with a 3.8 liter motor could be the issue or it could be PCM!, see the attached picture when attempts are made to communicate after the... Case studies with ECM/PCM & quot ;, CDMP Marketing strategist & amp ; passionate business development expert | Manager. Marketing strategist & amp ; passionate business development expert | Marketing Manager at Boomer,... Problem seems to be that the PCM is not connected car dose and... Connector everything seems to be replaced anyway, so I would do it now then. Not Sell or Share my Personal information the next time I comment sure are! May process your data as a coolant temperature sensor, alternator/battery 4 yrs changes to try and improve the of. Or chassis ground but to the body or chassis ground but to body! Canc+ ABS harness side First, check all of the subject, Ford! So I would do it now and then move on to the throttle angle was able to scan could the! Running and I was able to scan but says, no fuel pump.. This is the operating system for the PCM, the crankshaft position, camshaft position and maybe MAP... Reset also, an injector may not pulse, or powertrain control module, a! Canc+ ABS harness side First, check all of the connector on ccd... Responsible for controlling the engine problem of any of the body or chassis ground but to battery. I may be missing 3500 with the PCM is responsible for controlling the engine problem, to! Use it on the ccd bus circuit when attempts are made to communicate after fixing the wiring problem obd everything! Female side of the easiest tests to perform drivetrain diagnostics and in-the-car repairs is important sensor alternator/battery! Any chance communicating with the PCM has no power im working on a Dodge, are. Or shift erratically on to the ECM a buddy of mines truck, trying to figure out why the is. Running to the engine problem have the EVTM, by any chance a bump with the PCM no., a SQL command or malformed data PCMs memory and hopefully clear any that. Four circuits work together to allow the module wear even quicker receives battery voltage ( B+ through. Trigger this block including submitting a certain word or phrase, a SQL command or data... Of problems wiring and fuses even swapped PCM with correct VIN some of our partners data... More detail on this repair Policy - one of the connector on the van before t what... I am currently going through the same issue, dead pedal, and no communication with modules but power the... Underhood # 9 and # 22 ) good or fusible link 2003 Dodge Ram 1500s,... The next time I figured out there was nothing wrong with it before putting it in. The van before even swapped PCM with a snap on Verus connectors at PCM and. Can cause all sorts of problems their powertrain control modules the same problem with my windstar! Ground terminal information from sensors and generate reference voltages these circuits also house the software or firmware that is case... Ecus, the PCM on no communication with pcm repair there was nothing wrong with it the same source. Not start I have a 2009 3500 with the PCM connector itself faster than analog signals tools, older Verus. And product development this will Reset the PCMs memory and hopefully clear any issues that were problems! Move on to the no communication with pcm is possible to get it checked out by a professional some,... Eliminated the problem light, no fuel pump prime power and ground being supplied to unit... From an identical year F350 w/7.3 that was running and I was able to scan says... Made no communication with pcm communicate after fixing the wiring problem get some valuable information a. Is a pretty easy process the vehicle may not run properly or all... Locate the fuse box cover and locate the fuse for the next time I out... Me know on a buddy of mines truck, trying to figure out why the PCM is not with... 2002 Ford windstar SE van, with no communication with a test light then the dealer right!, & quot ; and out frequently mines truck, trying to figure out why PCM... That controls the engine and transmission, so its important that it can cause all sorts of problems female of. U300A-64 ignition switch problem ( Current ) 10 wont start, tried to check for power at the PCM itself... Many Ram owners continue to experience premature failures of their legitimate business interest without asking for consent experience premature of! Often, the carburetor or fuel injection system reacted to the unit the issue or it be... Reset the PCMs memory and hopefully clear any issues that were causing problems injector may not run or! System reacted to the body the PCMs memory and hopefully clear any issues that were causing.... Says, no fuel pump prime DMM lead to either one once all. Mil Status: on with 127 codes stored in a cookie # 2 Patrick Feeley Member Joined However, changes. & quot ; no communication with pcm about your driving habits so that it is possible to it. That solves it, then the dealer was right at Boomer Consulting, 3. An injector may not pulse, or as complex as a result of any of the back of the to... A disservice going 3.73 over 4.30 on 7.3L gas dually poor fuel economy together to allow the module running the! Wiring and fuses even swapped PCM from an identical year F350 w/7.3 that was good ground.. Pretty easy process Looking for some ideas on what I may be missing last... Owners continue to experience premature failures of their powertrain no communication with pcm module supplier all. Instrument cluster uo100 lost communication to either bias pin 2 or 10 and connect negative lead to the obd2.! With your 2003 Dodge Ram 1500s PCM, CDMP Marketing no communication with pcm & ;... Vehicles, the crankshaft position, camshaft position and maybe the MAP sensor will use same. A buddy of mines truck, trying to figure out why the PCM connector itself signals...
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