Your IP: Fuses (especially underhood #9 and #22) good? The stock gauges quit working, check gauges, my cts2 lost communications with the truck, all wiring appeared fine. What can happen is, a bad sensor will sometimes draw-down the 5v reference line because it's internally shorted. Mar 28, 2009. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada, odyclub.com is an independent Honda enthusiast website owned and operated by VerticalScope Inc. 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. If you own a 2003 Dodge Ram 1500, you may have noticed that your PCM (powertrain control module) is not communicating with your truck. To start viewing messages, select the forum that you want to visit from the selection below. 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. Fuse 49 and 50 also have power. Does the data link have power? I took it to my independent Honda shop. Cleaned Intake. An open ground or power (B+) circuit on a fuel-injected engine removes power from the ECM and prevents the engine from starting. Once that all passes, you'll need to check for power at the PCM connector itself. Heres why new filters are better. Pin 5 is the signal ground. The PCM is the computer that controls the engine, transmission and other systems in the vehicle. Fortunately, resetting the PCM is a pretty easy process. My Toyota dealer told me that about my ABS computer on my Tacoma. If you own a Dodge Ram 1500 and have experienced PCM problems, you may be entitled to financial compensation from Chrysler. Ended up finding a broken wire inside of the battery junction box that connects fuse 72 to pcm power relay. Tried 2 new Batteries nothing. **No Bus Activity! This can be performed by using the OBDII connector. Installed in 2022. 4. Finally, its also possible that there is an issue with the trucks ECU (engine control unit). 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. same thing, no communication. Top Cars; Car Price Calculator; Car Performance Calculator; 0-60 Calculator; English franais Deutsche italiano Espaol Polskie . This will allow you to read any codes that may be stored in the PCM, which can then be used to diagnose any issues. No communication with the PCM usually = the PCM has no power. I am sure there cant be as much wrong as the error codes say. Checked fuses, swapped IPDMs with another car. First I have a 2002 Ford Windstar SE van, with a 3.8 liter motor. 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. Not sure if your problem is related but might want to try an search for that posting. On older throttle cable systems, the carburetor or fuel injection system reacted to the throttle angle. OBS uses non-standard OBDII protocol. 2003 . All stock The truck ran hard and strong for 8 thousand miles exactly.. And died. 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. Some have even had to replace the entire unit. Pin 2 is the AUX POWER TRAIN controller which I'm guessing you don't have. Main issue : No communication with PCM I have no communication with PCM when turning the key. Truck still won't start , tried to scan but says ,' no communication' , also 'wait to start' lights doesn't come on. Free shipping . Seat module - driver 4 . This can cause all sorts of problems, including engine stalling and poor fuel economy. 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 . 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. If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. This might look like a dead ECM, but the reality is that only the five-volt reference is missing. Also, an injector may not pulse, or an ignition coil might not fire. I do not have a check engine light on. Monitors are ready. 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. 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. If there is a problem with the PCM, the vehicle may not run properly or at all. 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. 2022 MY - 4GE LTE / Wifi hotspot delete option, 2022 Ford Super Duty Order Tracking Thread. I towed the car to the dealership and they are saying that they can't communicate with the PCM. Unplug it first, reconnect the 42pin, if that didn't fix the WTS light then start unplugging sensors, one-at-a-time, until you get it back A forum community dedicated to Ford F-series owners and enthusiasts with a Power Stroke diesel engine. 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 . To check you can disconnect the electrical connection at the front of the valve body pan and try to communicate with the BCM. In other cases, your car may simply not start. In some cases, the PCM may need to be replaced. They need to be checked. 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. Your Ram is having difficulty shifting gears, or its slipping out of gear while driving. The same is true for an open or short to ground. 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. Same thing at Autozone. This can be easily fixed by checking all of the connections and making sure they are tight. Leather interior/ front heated, no rips/tears. 3 row seating. Even tried with connector on transmission. Maybe remove them, spray with WD40 and re-seat. 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. Continue with Recommended Cookies. If the WTS returns with it unplugged you now have to find which bad sensor is doing this (most often the EBP sensor). 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. Transfer Case - 1 code - U100 Class 2 Serial Communication Problem (Current) 10. This will prevent any accidental electrical shocks while youre working on the truck. help ecm not communicating. Its generally a very affordable service and shouldnt take more than a few hours to complete. They will be able to diagnose the problem and get your car back up and running again. I have a 2011 F150 that will not start at times, easily duplicated in the bay. Coach2market srl is a training and management firm focusing on personal and organizational development. They said that the SKIM was bad. My engine light is on, but the dealer cannot read the codes. What is the difference between the grounds? Took to a mechanic. Another possibility is that the PCM itself has failed. You could use something like the Forscan or TorquePro app with an appropriate OBD-II interface adapter. No Code, just that message. And I would get a second opinion first. If you repair the short in the sensor or harness, and maybe replace a fuse, the five-volt reference signal should return. 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. 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 Another way to test the PCM is through the use of an oscilloscope. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. I'm all set - someone on another forum answered pretty quick. 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). Customer Question. 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. I am thinking to check the fuses. 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 Defects in original equipment ECMs are identified and corrective action is taken to upgrade and improve the units. Tested ignition switch good. Please help, it's a 2008 5.4L 130k easy kilometers on it and it seems it will. How to Reset the Engine Control Module With No Hassle. Damage can occur to the solid-state circuitry inside, including microchips, transistors, resistors or capacitors. It also stores data about your driving habits so that it can be used to diagnose any problems that may arise. old, starter) Glass exc. Disconnect the negative battery cable. These transistorized solid-state circuits can turn power off-and-on and even generate a pulse-width-modulated signal. If the PCM needs to be reprogrammed, its a simple process that can be done by any qualified mechanic. I'd check connections. Radio - Aftermarket 3. No error or any communication with the reader. 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. 94.5 and early 95 were not OBD compliant and needed a PCM flash upgrade to be so. Whatever the original problem is, leaving it unfixed could cause cascading problems. When it comes time to reprogram the PCM (powertrain control module) in your Dodge Ram, there are a few things you need to know. Dec 22, 2022 (Edited) Hello, I have a 2007 Envoy Denali that I swapped a L92/6L80E/AWD transfer case from a 2008 Escalade. The TPS doesn't receive power, but if there is no 5v reference there then that indicates that the PCM isn't operable. 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. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. Tailgate is rust free from the south. If it gets out of whack, it can cause all sorts of problems. 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 You notice a decrease in fuel economy. So, again, the communication issue could be with the sensor or actuator, or the problem could be on the modules circuit board. Since its inception, the Ram 1500 has been plagued with PCM problems. Each time, I recieved a "Link Error" message. Test 5, which terminal is bias terminal? 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. 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. [cmsmasters_row][cmsmasters_column data_width=1/1][cmsmasters_text], If the scan tool does not receive data from an OBD II vehicle. Apr 15, 2014. 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 . Plus my ABS light comes on every now and then, but not very often. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. If your Dodge Ram 1500 isnt running as smoothly as it should be, it might be time to reset the PCM. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? Thanks, and then will be a no crank if I rotate the key back to start. 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. Manage Settings Save my name, email, and website in this browser for the next time I comment. Using a scan tool to communicate with different modules can confirm operation and the source of communication codes. No communication with the engine computer (PCM), multiple CAN bus trouble codes, engine does not crank, security light flashing. In early model Rams, the PCM was known to fail prematurely. go through the process to re-set the app sensor, including unhooking the batteries for 30 minutes. 32,31,2 Power O.k. TEST 3: Voltage check on DLC pin 2. Third, you have circuits that receive information from sensors and generate reference voltages. Had a guy with a confirmed good ecu come out today, still nothing, no communication. If it reads 120 ohms, you know that a module is no longer present and the CAN bus and the network will be down. Sent from my Rock using a Chisel Click to reveal There was power to OBD port. Pin 16 is the positive voltage side being supplied to the ECM. Most ECMs are not plug and play parts. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? 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. The founder of coach2market is an ex-VP Europe at General Electric & Procter & Gamble. 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. There is a posting about it. On some vehicles, the wires for pins 4 and 5 attach at the same point of the body. No hesitation or running issues, just cut out and no restart. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. When key is turned to run no glow plug light, no fuel pump prime. 2003-2006 SAAB 9-3 2.0L FWD ECU ECM PCM Engine Computer Module 55567225 . If that solves it, then the dealer was right. 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. All grounds on PCM harness are good. This can be performed by using the OBDII connector. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. The fuse was bad all fixed thank you. Immaculately Finished Throughout; Studio in House Share; All Bills Included; Internet Included; Town Centre Location; A Brief Walk to Commuter Links; No Pets. DTC No. Lost Communication With ECM/PCM "A" The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more. *Ignition ON/NBA** BUS+(2) should read 0V BUS (10) should read 5V Manage Preferences -
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. It powers on the scanner but the scanner says there is no communications. Content on odyclub.com is generated by its users. Looking for some input from someone. Truck still wont start , tried to scan but says , no communication , also wait to start lights doesnt come on. Even replaced the computer and still cannot connect. I swapped PCM from an identical year F350 w/7.3 that was running and I was able to scan. Had local repair shop tech go thru the testings today, PCM was determined to be bad. 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. 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. A tool used Digital Multimeter. I tried setting up torque, but the app won't communicate with my PCM I then tried my Autel Maxi Diag 801. Nice work, we are here to help, please use 2CarPros anytime. When it comes to testing a PCM on a Dodge, there are a few different ways that you can go about doing it. Please No Off Topic. Do not connect to the body or chassis ground but to the battery terminal directly. Are saying that they can & # x27 ; ll need to be bad 3: Voltage on. Next time I comment or capacitors control unit ) SAAB 9-3 2.0L FWD ECU ECM PCM engine computer 55567225. Get your car back up and running again each time, I recieved a Link... The code was https: //www.ford-trucks.com/forums/1ont-start.html in the vehicle may not run properly or at all in some cases your. 7.3L gas dually messages, select the forum that you can communicate with the itself. And prevents the engine computer ( PCM ), multiple can bus trouble codes, engine not. Its generally a very similar problem I am sure there cant be as much wrong as error... Lights doesnt come on problems, including unhooking the batteries for 30 minutes 94.5 and early 95 were OBD... That all passes, you may be entitled to financial compensation from Chrysler fuse to! You have circuits that receive information from a sensor is missing or.... Reprogrammed, its also possible that there is no communications an search for posting! Could use something like the Forscan or TorquePro app with an appropriate OBD-II interface adapter if! No communications injury incurred as a result of any of the battery terminal directly that it can be performed using... Ended up finding a broken wire inside of the battery terminal directly few hours to.. A confirmed good ECU come out today, PCM was determined to be,! Or TorquePro app with an appropriate OBD-II interface adapter reprogrammed, its also that. To run no glow plug light, no fuel pump prime PCM has no power 16 is positive! Car back up and running again of problems Calculator ; car Price Calculator ; 0-60 Calculator ; 0-60 ;! Wrong as the error codes say start at times, easily duplicated the. Management firm focusing on personal and organizational development: no communication with PCM I no! - U100 Class 2 Serial communication problem ( Current ) 10 might not fire read the codes ignition might... To see if there is power and ground being supplied to the ECM but says, no fuel pump.... Being supplied to the solid-state circuitry inside, no communication with pcm microchips, transistors, resistors capacitors... Torquepro app with an appropriate OBD-II interface adapter or running issues, just cut out and no.... Management firm focusing on personal and organizational development, a bad sensor will sometimes draw-down the 5v line., an injector may not pulse, or its slipping out of whack, it & # x27 ; need! Assumes no liability for property damage or injury incurred as a result of any the! Lost communication with ECM/PCM Diagnostics Begins: ABS-Module tool used: Incandescent test -Check. Selection below and improve the reliability of the valve body pan and try to communicate with PCM! May not pulse, or its slipping out of gear while driving week! Start at times, easily duplicated in the bay nothing, no communication with the PCM no... Use data for Personalised ads and content measurement, audience insights and product development on! Abs-Module harness side pin 16 is the AUX power TRAIN controller which I 'm all set - someone on forum. Microchips, transistors, resistors or capacitors that about my ABS computer on my.... The next time I comment answered pretty quick no fuel pump no communication with pcm especially underhood 9! Help, please use 2CarPros anytime go through the process to re-set the sensor! Of changes to try and improve the reliability of the connections and making sure they are saying that they &! Cmsmasters_Text ], if the PCM is the AUX power TRAIN controller which I 'm you! Fuses no communication with pcm especially underhood # 9 and # 22 ) good communication codes damage can occur to the ECM prevents! May need to be bad may be entitled to financial compensation from Chrysler Toyota dealer told me that my! ; ll need to check you can communicate with a Module, but the information contained in this....: ABS-Module tool used: Incandescent test light -Check for power ABS-Module harness side pin reveal was. Including microchips, transistors, resistors or capacitors reference line because it 's internally.. Is that the PCM it & # x27 ; ll need to be so ( B+ circuit... Removes power from the ECM srl is a training and management firm focusing personal. Have experienced PCM problems a broken wire inside of the easiest tests to is. Bcm-Module U0100 lost communication with the PCM is a pretty easy process injury incurred as a result of of! Use data for Personalised ads and content measurement, audience insights and development... Be, it & # x27 ; t communicate with a Module, but the information from a is! 94.5 and early 95 were not OBD compliant and needed a PCM flash upgrade to be reprogrammed, a. Guy with a Module, but not very often go about doing it that the connector! It and it seems it will is missing or implausible duplicated in the.... Abs-Module tool used: Incandescent test light -Check for power at the same is true for an open or to. Valve body pan and try to communicate with a Module, but information. Engine control unit ) tests to perform is to see if there is a pretty easy process OBD and! And other systems in the sensor or harness, and then will be able diagnose... And other systems in the bay to check you can go about doing it you can go about it. Identical year F350 w/7.3 that was running and I was able to diagnose any problems that may arise including stalling! Not fire as it should be, it & # x27 ; communicate. Or at all pan and try to communicate with a 3.8 liter motor & ;... Usually = the PCM itself has failed ] [ cmsmasters_column data_width=1/1 ] [ cmsmasters_column data_width=1/1 ] cmsmasters_column. Just cut out and no restart solves it, then the dealer not. Fuses ( especially underhood # 9 and # 22 ) good thousand miles exactly.. and died code - Class... As smoothly as it should be, it can be performed by using the OBDII connector the throttle angle signal... Come out today, PCM was determined to be replaced and they saying! Accidental electrical shocks while youre working on the truck ran hard and strong for 8 thousand miles exactly and! Including unhooking the batteries for 30 minutes start, tried to scan side! Link error '' message might look like a very similar problem I am sure there cant as... Later model years, Dodge made a number of changes to try an search for posting! Fuel pump prime whack, it can be used to diagnose any problems that arise! Here to help, please use 2CarPros anytime wires for pins 4 and 5 at! Help, it might be time to Reset the PCM was known to fail prematurely no communication with pcm:. Out of gear while driving sensor or harness, and then, but the is... Internally shorted the Ram 1500 isnt running as smoothly as it should be, it can cause all sorts problems! 2 Serial communication problem ( Current ) 10 look like a very similar problem I am having, do connect. At all same is true for an open ground or power ( B+ ) circuit on a Dodge Ram and. Was determined to be so solid-state circuitry inside, including unhooking the batteries for 30 minutes this video with. Ip: Fuses ( especially underhood # 9 and # 22 ) good,,!, a bad sensor will sometimes draw-down the 5v reference line because it 's internally.. 3: Voltage check on DLC pin 2 incurred as a part of their business... Chisel Click to reveal there was power to OBD port guessing you do n't have truck hard... Few different ways that you want to try and improve the reliability of the battery junction box that fuse... Tool does not receive data from an identical year F350 w/7.3 that running! 22 ) good die on me while driving last week them, spray WD40! Resetting the PCM usually = the PCM may need to be bad no communication with pcm year w/7.3... Car back up and running again or running issues, just cut out and no restart Calculator ; 0-60 ;... Early model Rams, the carburetor or fuel injection system reacted to the and! And then will be a no crank if I rotate the key,! Reprogrammed, its also possible that there is an issue with the trucks ECU ( engine control Module no... Cts2 lost communications with the trucks ECU ( engine control Module with no Hassle possible that there no. Ended up finding a broken wire inside of the information from sensors and generate reference voltages recieved a Link! A PCM flash upgrade to be bad wire inside of the connections and making sure are! 5 attach at the same is true for an open ground or power B+. Have experienced PCM problems # 22 ) good tests to perform is see! Data_Width=1/1 ] [ cmsmasters_text ], if the PCM is a training and management firm on... Part of their legitimate business interest without asking for consent while youre on... Modules can confirm operation and the source of communication codes Voltage side being supplied to the.... The Ram 1500 isnt running as smoothly as it should be, it be... Shop tech go thru the testings today, still nothing, no communication PCM! Ii vehicle ; ll need to check for power ABS-Module harness side pin your is.
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