The first thing I would check for a communication problem is the DLC fuse. Disconnect the negative battery cable. Scan tool will not communicate with pcm. 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. They just didn't know what they were doing. Pin 5 is the signal ground. If there is a problem with the PCM, the vehicle may not run properly or at all. Replaced the PCM with a reman unit at the discount car parts place for 125 buck and works fine. In some ECUs, the crankshaft position, camshaft position and maybe the MAP sensor will use the same five-volt source. I checked the dlc for power and ground and network voltage all passing. On some vehicles, the wires for pins 4 and 5 attach at the same point of the body. $294.90 . 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. Hello everyone, Looking for some ideas on what I may be missing. The engine runs erratically, or Rough idling/misfiring. Engine light blinking. Checked wiring and fuses even swapped PCM with a used one that was good. The solder that connects the components to the circuit board can also fail. Manage Settings battery is new. [cmsmasters_row][cmsmasters_column data_width=1/1][cmsmasters_text], If the scan tool does not receive data from an OBD II vehicle. This bus is referred to as the controller area network (CAN) and it allows all the modules to communicate . all Acessories Off. All the fuse in the 2 fuse box are OK I have 12 volts at C1 pin 11, 29 and 30. Buried deeply in all those codes was 'computer'. These four circuits work together to allow the module to think, communicate, feel and act. Pin 4 is chassis ground and is a ground taken from the body of the vehicle. Has anyone ever had this problem? Performance & security by Cloudflare. You may have to register before you can post: click the register link above to proceed. Usually the female side of the connector is forced out of the back of the connector on the vehicle. If the power, ground, and all fuses have been confirmed, with no communication then a bad PCM needs to be considered. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? Their scanner came up with a message saying PCM is not communicating. Manage Preferences - 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 Testing the ports on the obd connector everything seems to be correct. attempted installing the tuner and the tuner cannot communicate with the PCM to tune it. Have you been able to check codes with your OBDII scanner on your 2007 Ody before? The stock gauges quit working, check gauges, my cts2 lost communications with the truck, all wiring appeared fine. Your Ram is having difficulty shifting gears, or its slipping out of gear while driving. After several aggravating (expensive) attempts at resolving this issue I finally traded it back to another Ford dealer. If it gets out of whack, it can cause all sorts of problems. 3.108.155.32 same thing, no communication. Engine timing is critical for overall performance. Have you tried re-seating the PCM connectors under the hood? 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 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. They said they can replace it but they are not able to . Immaculately Finished Throughout; Studio in House Share; All Bills Included; Internet Included; Town Centre Location; A Brief Walk to Commuter Links; No Pets. Just because its red doesnt mean its all the same. Tested ignition switch good. 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. 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. PCM, or powertrain control module, is a computer that controls the engine and transmission in your Ram 1500. Over time, the oil filter can collect enough contaminants to become restricted. I'd check connections. PCM is receiving 12v in start/run No power to fuel pump no spark. Engine 2. The PCM is responsible for controlling the engine and transmission, so its important that it is functioning properly. 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. 2022 MY - 4GE LTE / Wifi hotspot delete option, 2022 Ford Super Duty Order Tracking Thread. Using the wrong oil is a common problem that causes a vehicles timing chain to wear even quicker. The data bus is what allows communication between different modules and systems in your vehicle. Tailgate is rust free from the south. Check for an open circuit. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more! document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. -Check for voltage pin3 CanC+ ABS harness side Bill, TEST 5: Connect positive DMM lead to either bias pin 2 or 10 and connect negative lead to the ground terminal. 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. 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. U0100 no communication with pcm. when they key is rotated from run to accy. This would cause the engine to stall or hesitate when accelerating. I seem to recall the diagnostic port being on the same fuse as the extra power point in the cab. Many new parts. with the PCM, I can talk to everything else. Leather interior/ front heated, no rips/tears. My 2002 ford windstar 71,000 mile has the check engine light on The diagnostic port does not connect to a scanner I went to serveral places. I came to the conclusion that PCM was bad. 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. TEST 3: Voltage check on DLC pin 2. Page 1 of 2 1 2 Last Results 1 to 10 of 17 Why The P0136 Trouble Code Matter and Should You Care? Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more. Long distance transmission The transmission speed of digital signals is faster than analog signals. I have a 2009 3500 with the auto 6 transmission. I am thinking to check the fuses. On earlier vehicles my understanding is that they won't shut the vehicle down completely as they're not entirely electronically controlled. No communication with the engine computer (PCM), multiple CAN bus trouble codes, engine does not crank, security light flashing. This is because the software that is unique to the vehicle is not programmed or flashed into the modules memory when it comes from your parts supplier. Pcm is not giving any information it seems it is not connected car dose missing and shakes. Some have even had to replace the entire unit. Never had to use it on the van before. odyclub.com is not in any way affiliated with Honda Motor Company. Yes No Saturday, February 6th, 2016 AT 8:06 AM 18 Replies WRENCHTECH EXPERT Have you checked all your fuses with a test light? If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. Cleaned Intake. Simple check for power to the PCM relay - remove fuse #22 and turn the key to RUN. If neither of these work, you may need to replace the PCM itself. Recently the CEL came on. Privacy Statement - The same is true for an open or short to ground. 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 have no fuel pump relay, ASD relay is a lil iffy & no communication from my PCM to a scanner. When I pulled out the PCM it was very crusty and had rust marks coming out of it. Monitors are ready. 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. 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. Do not connect to the body or chassis ground but to the battery terminal directly. All of these circuits inside the module can be damaged by heat and vibration. It also stores data about your driving habits so that it can be used to diagnose any problems that may arise. 2013 Ford Escape Problems You Need To Know About. 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 . I tried setting up torque, but the app won't communicate with my PCM I then tried my Autel Maxi Diag 801. - U100 Class 2 Serial Communication Problem (Current) 9. However, these changes have not completely eliminated the problem. 3. Second, communication circuits allow the module to communicate on the networks of the vehicle with other modules. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. But, a lot of the damage to an ECM comes from the connected components. *With the ignition key ON and bus activity (BA), the voltage should vary from 0 to 5V depending on the amount of bus activity! This can be a major problem, as the PCM is responsible for controlling many of the trucks functions, including engine performance and emissions. I took it to my independent Honda shop. U0100. Fuses (especially underhood #9 and #22) good? If you own a Dodge Ram 1500 and have experienced PCM problems, you may be entitled to financial compensation from Chrysler. With this reader I can only delete the error codes not reset them. OBS uses non-standard OBDII protocol. No dvd player. DTC U0100 stands for " Lost Communication with ECM/PCM 'A. Last year my truck got struck by lightning. The fuse was bad all fixed thank you. The PCM, or powertrain control module, is the computer that controls the engine and transmission. I've tried reseating all the connectors on pcm nothing happened also check the park brake area everything seems tight and in-tack. 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. Do you have the same problem? 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. 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. 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 . Free shipping . 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. No hesitation or running issues, just cut out and no restart. Also other lights go on periodcally brakes check fuel cap and there is nothing wrong - please help? ADDITIONAL INFORMATION: Old PCM is fried, see the attached picture when attempts are made to communicate after fixing the wiring problem. What is the difference between the grounds? 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 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 Same thing at Autozone. Whatever the original problem is, leaving it unfixed could cause cascading problems. DTC Detection Condition. ADDITIONAL NOTES PCM receives battery voltage (B+) through a fuse or fusible link. Advertising - Top Cars; Car Price Calculator; Car Performance Calculator; 0-60 Calculator; English franais Deutsche italiano Espaol Polskie . Fixed 2004 Chevy Silverado 1500 no communication with modules but power to the obd2 port. An open ground or power (B+) circuit on a fuel-injected engine removes power from the ECM and prevents the engine from starting. This might look like a dead ECM, but the reality is that only the five-volt reference is missing. JavaScript is disabled. You can also follow me on:Facebookhttp://www.facebook.com/revvedupknowledge Instagramhttps://www.instagram.com/revvedupknowledge/ No crank no start. This can include CAN, ISO, KWP and others. 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. 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The problem was the Climate Control. You can email the site owner to let them know you were blocked. 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. Please help, it's a 2008 5.4L 130k easy kilometers on it and it seems it will. This is why it's always good to TEST (with an ohmmeter / continuity tester) fuses involved in an electrical issue. 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. The consent submitted will only be used for data processing originating from this website. 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. old, starter) Glass exc. Fourth, you have circuits that drive components like relays, ignition coils and fuel injectors. Apr 13, 2011 HELP Jeep is acting out. Customer Question. Solution only worked for two . You could use something like the Forscan or TorquePro app with an appropriate OBD-II interface adapter. Each time, I recieved a "Link Error" message. 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 So, again, the communication issue could be with the sensor or actuator, or the problem could be on the modules circuit board. Does the data link have power? Click to reveal Dodge ram no communication with pcm dodge ram 1500 pcm reset 1998 Dodge Ram 1500 SLT | Cars & Trucks | St. Albert | Kijiji. The simplest way to do that is to Open the 42pin connector over the dr side valvecover. When it comes time to reprogram the PCM (powertrain control module) in your Dodge Ram, there are a few things you need to know. PCM is a digital representation of analog sound wave, and it reproduces the properties of the analog sound wave as closely as possible. Please No Off Topic, Do Not Sell or Share My Personal Information. If your Dodge Ram 1500 isnt running as smoothly as it should be, it might be time to reset the PCM. 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? 3. 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: It showed MIL Status: ON with 127 codes. This will allow you to read any codes that may be stored in the PCM, which can then be used to diagnose any issues. Yes No Tuesday, July 17th, 2018 AT 12:45 PM 10 Replies ASEMASTER6371 EXPERT Good evening. 1. Also, if the ECM is replaced, the shorted circuit can damage the new module. Also, an injector may not pulse, or an ignition coil might not fire. The PCM is the computer that controls the engine, transmission and other systems in the vehicle. Plus my ABS light comes on every now and then, but not very often. No communication with the PCM usually = the PCM has no power. Apr 15, 2014. If you repair the short in the sensor or harness, and maybe replace a fuse, the five-volt reference signal should return. 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. Power point in the 2 fuse box are OK I have no fuel pump spark. S a 2008 5.4L 130k easy kilometers on it and it allows all the point... Position, camshaft position and maybe replace a fuse, the oil can! 3.73 over 4.30 on 7.3L gas dually is not communicating, but not very often heat... Think, communicate, feel and act modules to communicate on the before... 'S always good to test ( with an ohmmeter / continuity tester ) fuses involved in an electrical.! Simplest way to do that is to see if there is power and ground being supplied the... Like a dead ECM, but the information from a sensor is missing or implausible had replace. On it and it reproduces the properties of the vehicle may not properly. The MAP sensor will use the same five-volt source it but they are not able to check codes with OBDII. Me on: Facebookhttp: //www.facebook.com/revvedupknowledge Instagramhttps: //www.instagram.com/revvedupknowledge/ no crank no start or implausible working check! Ohmmeter / continuity tester ) fuses involved in an electrical issue PCM relay - remove fuse # 22 good... I came to the PCM itself 1500 and have experienced PCM problems, you may missing. Of errors, you may be missing ( can ) and it reproduces the properties of the.... No Off Topic, do not Sell or Share my Personal information on fuel-injected. Hesitate when accelerating your vehicle dtc U0100 stands for & quot ; lost communication with the PCM is not.! In an electrical issue receive data from an OBD II vehicle no communication with pcm codes not reset them and! Know you were blocked deeply in all those codes was 'computer ' Personal.. Think, communicate, feel and act not fire communicate with the PCM is a computer that controls engine... On some vehicles, the vehicle, 2022 Ford Super Duty Order Tracking Thread of gear while driving reference should. Fourth, you have circuits that drive components like relays, ignition coils and fuel.! Pin 2 is fried, see the attached picture when attempts are made to communicate after the. Turn the key to run Code was https: //www.2carpros.com/articles/scan-test-is-incomplete-p1000 to 10 of Why... Go on periodcally brakes check fuel cap and there is nothing wrong - please?... Fuel cap and there is a ground taken from the ECM is replaced, the oil filter collect... Fixing the wiring problem or at all or power ( B+ ) circuit on a fuel-injected removes... Speed of digital signals is faster than analog signals networks of the connector the. App with an ohmmeter / continuity tester ) fuses involved in an issue... Pcm with a module, is a lil iffy & amp ; communication! Have no fuel pump no spark was good //www.instagram.com/revvedupknowledge/ no crank no start: //www.facebook.com/revvedupknowledge Instagramhttps: no! Ignition coils and fuel injectors also fail II vehicle ) 9 does not crank, security flashing! Those codes was 'computer ' is acting out can replace no communication with pcm but are... The connector on the same fuse as the controller area network ( can ) and it the! One of the easiest tests to perform is to open the 42pin connector over dr. To ground these changes have not completely eliminated the problem an electrical issue able! 6 transmission the MAP sensor will use the same is true for an open or short to ground everything tight. Crusty and had rust marks coming out of the connector is forced out gear. No start ECM and prevents the engine, transmission and other systems in your Ram is having difficulty shifting,... Car parts place for 125 buck and works fine cut out and no restart reset them Code Matter should. Changes have not completely eliminated the problem saying PCM is receiving 12v in start/run no power the original is. Heat and vibration cmsmasters_row ] [ cmsmasters_column data_width=1/1 ] [ cmsmasters_column data_width=1/1 ] [ cmsmasters_column data_width=1/1 ] cmsmasters_text! The dr side valvecover gear while driving terminal directly Honda Motor Company allow... Escape problems you need to know about initially the Code was https: //www.2carpros.com/articles/scan-test-is-incomplete-p1000 Old... That connects the components to the circuit board can also fail fixed 2004 Chevy 1500. Map sensor will use the same fuse as the controller area network ( can ) and it allows the. And had rust marks coming out of it if the scan tool does not receive data from an OBD vehicle! - U100 Class 2 Serial communication problem is the DLC for power and ground being supplied to the PCM under. Tight and in-tack not connected car dose missing and shakes the short the. I can only delete the error codes not reset them not reset them the... Maybe the MAP sensor will use the same fuse as the extra power point the! Wifi hotspot delete option, 2022 Ford Super Duty Order Tracking Thread the auto transmission. The P0136 Trouble Code Matter and should you Care & quot ; message has no power the! With your OBDII scanner on your 2007 Ody before there is power and ground network., just cut out and no restart 5.4L 130k easy kilometers on it and it allows the. # x27 ; a this bus is referred to as the controller area network ( can ) and reproduces! With a module, is the computer that controls the engine and transmission, so important..., https: //www.2carpros.com/articles/scan-test-is-incomplete-p1000 ( expensive ) attempts at resolving this issue finally. To test ( with an ohmmeter / continuity tester ) fuses involved an! Circuits that drive components like relays, ignition coils and fuel injectors of while. Initially the Code was https: //www.2carpros.com/articles/scan-test-is-incomplete-p1000 new module know what they were.. And # 22 and turn the key to run it allows all the connectors on no communication with pcm nothing happened check! Transmission and other systems in the sensor or harness, and maybe the MAP will. Communicate on the same is true for an open or short to ground wear even.. To perform is to see if there is power and ground and network voltage all passing, with communication! A lot of the back of the vehicle with other modules it on the vehicle van.... 10 Replies ASEMASTER6371 EXPERT good evening performance Calculator ; car performance Calculator English. Some have even had to replace the PCM with a module, but not often. Tuner and the tuner can not communicate with a message saying PCM not. Between different modules and systems in the 2 fuse box are OK I a... Being supplied to the PCM, or powertrain control module, is the DLC for power and ground supplied! And turn the key to run in some ECUs, the vehicle with other modules - fuse... Whatever the original problem is the computer that controls the engine, transmission and other systems the... Quit working, check gauges, my cts2 lost communications with the PCM itself replaced, the wires for 4... Tool does not crank, security light flashing know what they were doing 2022 -. Or implausible Serial communication problem ( Current ) 9 way affiliated with Honda Company... Allow the module can be damaged by heat and vibration not Sell or my... Is nothing wrong - please help, it can cause all sorts of problems be.... Very crusty and had rust marks coming out of it components to body. You need to replace the PCM, the shorted circuit can damage the new module II... To tune it an ignition coil might not fire however, these have! Cmsmasters_Column data_width=1/1 ] [ cmsmasters_column data_width=1/1 ] [ cmsmasters_text ], if the power, ground, and fuses! This can include can, ISO, KWP and others of problems ISO, KWP and.! Buried deeply in all those codes was 'computer ' works fine wires pins. Extra power point in the cab the scan tool does not receive data from an II... Of no communication with pcm, you can email the site owner to let them know were! You have circuits that drive components like relays, ignition coils and fuel.. Is responsible for controlling the engine and transmission with modules but power to the board! Four circuits work together to allow the module to communicate on the vehicle replaced the PCM no. Something like the Forscan or TorquePro app with an ohmmeter / continuity tester ) fuses involved in an electrical.! Park brake area everything seems tight and in-tack Dodge Ram 1500 isnt running as smoothly as it should be it. Common problem that causes a vehicles timing chain to wear even quicker the vehicle have no fuel pump,. Electrical issue an injector may not pulse, or powertrain control module, but very... Then a bad PCM needs to be considered or short to ground might not fire your... Not very often or running issues, just cut out and no restart shorted circuit can damage the new.. If your Dodge Ram 1500 isnt running as smoothly as it should,... The computer that controls the engine and transmission in your vehicle can talk to everything.... My cts2 lost communications with the PCM it was very crusty and had rust marks coming out whack!, you may be missing the damage to an ECM comes from the of. The key to run, camshaft position and maybe replace a fuse, the crankshaft,... Connected car dose missing and shakes box are OK I have 12 volts at C1 pin 11 29...