Apr 13, 2011 HELP Jeep is acting out. If your Dodge Ram 1500 isnt running as smoothly as it should be, it might be time to reset the PCM. 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. Defects in original equipment ECMs are identified and corrective action is taken to upgrade and improve the units. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. For a better experience, please enable JavaScript in your browser before proceeding. Learning how to perform drivetrain diagnostics and in-the-car repairs is important. The TPS doesn't receive power, but if there is no 5v reference there then that indicates that the PCM isn't operable. ' " It is triggered once there is a loss of communication between your PCM and a particular module. The check engine light is on, or there are other warning lights illuminated on the dash. will have to keep that in mine. Some have even had to replace the entire unit. The PCM, or powertrain control module, is the computer that controls the engine and transmission. They just didn't know what they were doing. Checked fuses, swapped IPDMs with another car. 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. If it reads 120 ohms, you know that a module is no longer present and the CAN bus and the network will be down. Proper voltages and Ohms. Any chip or other mods? The PCM is the computer that controls the engine, transmission and other systems in the vehicle. Cleaned Intake. If there is a problem with the PCM, the vehicle may not run properly or at all. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. 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? 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 . With any communication network, the resistance in the circuit, resulting voltage and circuit condition can determine if information is being communicated with other modules. (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. 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. In some cases, the transmission would also slip or shift erratically. battery is new. 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. *Ignition ON/NBA** BUS+(2) should read 0V BUS (10) should read 5V If youre having trouble with your 2003 Dodge Ram 1500s PCM, dont hesitate to get it checked out by a professional. If the WTS returns with it unplugged you now have to find which bad sensor is doing this (most often the EBP sensor). 2013 Ford Escape Problems You Need To Know About. On some vehicles, the wires for pins 4 and 5 attach at the same point of the body. TEST 3: Voltage check on DLC pin 2. Scanner can't establish connection with PCM on two different scanners. I do have WMI installed, if i want to blame that wiring for this but then its fine for 6 months with that install. Installed in 2022. Fortunately, resetting the PCM is a pretty easy process. If you were to swap an ECM from a known good vehicle or even with a new ECM, chances are it will not function, and the ECM might not communicate with sensors and other modules. Fuses (especially underhood #9 and #22) good? I meant to call this the Powertrain Control Module. 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. Cookie Policy - Dodge Ram owners have been having problems with their trucks PCMs for years. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. 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 . There is no way to repair the driver on the circuit board. [cmsmasters_row][cmsmasters_column data_width=1/1][cmsmasters_text], If the scan tool does not receive data from an OBD II vehicle. It showed MIL Status: ON with 127 codes. I took it to my independent Honda shop. Free shipping . I have a 2007 Odyssey. 4. 17 Pics about 1998 Dodge Ram 1500 SLT | Cars & Trucks | St. Albert | Kijiji : Dodge Ram No Communication With Pcm - Truck Guider, Dodge RAM HEMI 5.7L 09-14 Reaper Trinity 2 Stage 1 Kit Gasoline and and also Reset service . What year is your truck? The following concerns may be caused by an improperly seated exhaust system. No dvd player. What can happen is, a bad sensor will sometimes draw-down the 5v reference line because it's internally shorted. To start viewing messages, select the forum that you want to visit from the selection below. You can also follow me on:Facebookhttp://www.facebook.com/revvedupknowledge Instagramhttps://www.instagram.com/revvedupknowledge/ Please register or login to enable Dark Mode. Took to a mechanic. 2008 rouge, was running great turned it off, went to start it again 2 seconds later, crank but no start. The first thing I would check for a communication problem is the DLC fuse. However, these changes have not completely eliminated the problem. I'd check connections. I came to the conclusion that PCM was bad. Monitors are ready. Archive - If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. You can just see the break in the fuse, just off the left leg. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. Third, you have circuits that receive information from sensors and generate reference voltages. This will allow you to see the waveforms that are being output by the PCM, which can be helpful in diagnosing any issues. Engine 2. 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. I am thinking to check the fuses. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Many Ram owners continue to experience premature failures of their powertrain control modules. same thing, no communication. Plus my ABS light comes on every now and then, but not very often. Heres why new filters are better. You're beyond my knowledge of the subject, but here's a bump. They need to be checked. Top Cars; Car Price Calculator; Car Performance Calculator; 0-60 Calculator; English franais Deutsche italiano Espaol Polskie . Currently at 83K. Can anybody go into more detail on this repair? This can be performed by using the OBDII connector. There are a few possible causes of this problem, but the most likely one is a faulty ground wire. PCM is receiving 12v in start/run These two resistors are in parallel and if you measure the resistance between pins 6 for CAN Hi and 14 for CAN Low it should read 60 ohms. LOL. Towed it into town started. The fuse was bad all fixed thank you. It could be as simple as a coolant temperature sensor, or as complex as a mass airflow sensor. The solder that connects the components to the circuit board can also fail. JavaScript is disabled. No communication with PCM First, I tried the search tool, I really did.haha. I tried to check it with my OBDII Scanner. 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. 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. We and our partners use cookies to Store and/or access information on a device. Is this an Engine Computer or a Body Control Module? Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. The action you just performed triggered the security solution. DTC No. old, starter) Glass exc. Just follow these steps: All started at the same time. Transfer Case - 1 code - U100 Class 2 Serial Communication Problem (Current) 10. If one of the sensors has a short to ground or power, it can cause all the sensors using that five-volt reference to no longer communicate. If you own a 2003 Dodge Ram 1500, you may have noticed that your PCM (powertrain control module) is not communicating with your truck. Leather interior/ front heated, no rips/tears. Bill, TEST 5: Connect positive DMM lead to either bias pin 2 or 10 and connect negative lead to the ground terminal. It would start but shut off immediately. The other type of communication issue could be with a sensor or actuator. Has anyone run into this problem. Save my name, email, and website in this browser for the next time I comment. Used 2 different diagnostic tools, older Snap-on Verus and an Autel Elite, with no communication to either one. The data bus is what allows communication between different modules and systems in your vehicle. One possibility is that there is simply a loose connection between the PCM and the trucks wiring harness. I had the same issue, dead pedal, and no communication with a snap on verus. I towed the car to the dealership and they are saying that they can't communicate with the PCM. If neither of these work, you may need to replace the PCM itself. 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. Fuse 49 and 50 also have power. online007 is online now Continue Related GMC Questions No communication from PCM. Test 3, which terminal is for serial data? Please help, it's a 2008 5.4L 130k easy kilometers on it and it seems it will. 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. Its usually labeled PCM or ECU. Pull it out and wait a few minutes before putting it back in. go through the process to re-set the app sensor, including unhooking the batteries for 30 minutes. All the fuse in the 2 fuse box are OK I have 12 volts at C1 pin 11, 29 and 30. Has anyone ever had this problem? Customer Question. Just because its red doesnt mean its all the same. I had that problem with another ford, but similar pcm. 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 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. 2003 . Remove the fuse box cover and locate the fuse for the PCM. with a 3.2L engine. One of the best tools to diagnose this condition is an OBDII breakout box. Its generally a very affordable service and shouldnt take more than a few hours to complete. It has no connection to the PCM. It powers on the scanner but the scanner says there is no communications. 5. Tailgate is rust free from the south. The Dodge Ram 1500 is a half-ton pickup truck that was first introduced in 1981. Pin 16 is the positive voltage side being supplied to the ECM. I had no pcm communication with scanner, no tach and no WTS light. 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. and then will be a no crank if I rotate the key back to start. I checked the dlc for power and ground and network voltage all passing. It works on all of my other vehicles. Over time, the oil filter can collect enough contaminants to become restricted. Content on odyclub.com is generated by its users. I Was Driving My Van Yesterday, And It Was Running Fine, When All At Once The Message Center Displayed "fuel Computer Data Error." Continue with Recommended Cookies. Using a scan tool to communicate with different modules can confirm operation and the source of communication codes. Code U0100 stands for Lost Communication with ECM/PCM The powertrain control module (PCM) is the computer responsible for engine management. Yes No Tuesday, July 17th, 2018 AT 12:45 PM 10 Replies ASEMASTER6371 EXPERT Good evening. With this reader I can only delete the error codes not reset them. in the lighting in the cab. There are a few possible reasons why your PCM is not communicating with your truck, and well go over them here. DTC Output from. If the PCM detects a short (excessive current flow)on the 5 volt reference circuit the PCM shuts down,won't communicate until the short is repaired.Many components use reference voltage from the PCM.Here's a quick way to see if that might be your problem.Turn the ignition "On" and backprobe the EBP sensor or peel . Terms of Service - They said they can replace it but they are not able to . In some cases, you may see warning lights on your dash or hear strange noises coming from your car. Shutting off. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. An open ground or power (B+) circuit on a fuel-injected engine removes power from the ECM and prevents the engine from starting. Codes after cleared: instrument cluster uo100 lost communication to pcm u300a-64 ignition switch. These four circuits work together to allow the module to think, communicate, feel and act. Spot on passenger side frame needs weld and pcm won't communicate for emissions. Helga Melgar, MBA, PCM-Marketing Management AMA certified marketing and communications professional You should hear both the PCM relay and the glow plug relay click. Even replaced the computer and still cannot connect. I had the truck die on me while driving last week. 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. No start. Took all 3 connectors at pcm out and blowed air through and sprayed W.D nothing. Jump the plug by right battery starter turns. ADDITIONAL NOTES PCM receives battery voltage (B+) through a fuse or fusible link. 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. All stock The truck ran hard and strong for 8 thousand miles exactly.. And died. Engine light blinking. Is the Check Engine Light illuminated? Very small breaks like that can be hard to see, esp. Need To Find Computer Module, That Has Code For Door Locking. There is a posting about it. Another possibility is that the PCM itself has failed. Apr 15, 2014. What is so special about these classroom case studies? 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. Truck still won't start , tried to scan but says ,' no communication' , also 'wait to start' lights doesn't come on.

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