94.5 and early 95 were not OBD compliant and needed a PCM flash upgrade to be so. 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. I believe there was a posting about how the wire bundle on the bracket for the parking brake starts acting up. All grounds on PCM harness are good. Pigtail wiring included for your convivence. (Merged). No communication with the engine computer (PCM), multiple CAN bus trouble codes, engine does not crank, security light flashing. Second, communication circuits allow the module to communicate on the networks of the vehicle with other modules. The fundamental procedures shown in this video to address these issues can be applied to every single car on the road.ScannerDanner tools pages-https://www.scannerdanner.com/tools.html-https://www.amazon.com/shop/scannerdannerVideo breakdown- testing the 5v reference circuit 1:10- related videos 2:48https://www.youtube.com/watch?v=za13UnpbH7Ehttps://www.youtube.com/watch?v=z5DpsRwHTfohttps://www.youtube.com/watch?v=a-d6-jrGidAhttps://www.youtube.com/watch?v=jLwNcgtv9z0https://www.youtube.com/watch?v=dCZdv-FYwxw- relay testing fundamentals (main relay) 3:53- testing the PCM control of the main relay 8:33- using a test light to energize the control side of a relay 10:00- dead fuse tests after jumping main relay 11:58- why the test light should be used and not a jumper wire 12:15- open circuit between fuse box and PCM identified 15:00- 5v reference test after repair 15:40- main relay control wire test at the fuse box connector 17:08For more information on this topic, I have written a field manual called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.Want even more diagnostic training? Ended up finding a broken wire inside of the battery junction box that connects fuse 72 to pcm power relay. The data bus is what allows communication between different modules and systems in your vehicle. Please LIKE, COMMENT, SHARE AND SUBSCRIBE!!! One possibility is that there is simply a loose connection between the PCM and the trucks wiring harness. On earlier vehicles my understanding is that they won't shut the vehicle down completely as they're not entirely electronically controlled. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 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. Each time, I recieved a "Link Error" message. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? Often, the connector can be damaged if the scan tool or code reader has been pushed in and out frequently. Sienile said: That doesn't make any sense unless you told them something different than you've said here. 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. The fuse was bad all fixed thank you. Last year my truck got struck by lightning. Cheers! If this is the case, you will need to replace it with a new one. Certain engine control computer upgrades, for example, include upgraded components installed in critical circuits, installation of heavier injector transistors, circuit protected quad drivers, reflow of solder joints, and an upgraded power supply diode for the ignition circuit to improve durability. 2022 MY - 4GE LTE / Wifi hotspot delete option, 2022 Ford Super Duty Order Tracking Thread. got power on fuse 52, continuity from fuse 52 to pcm connector. Most ECMs are not plug and play parts. Towed it into town started. Tested ignition switch good. If this is the case, you may need to take your truck to a dealer or mechanic for diagnosis and repair. If there is a problem with the PCM, the vehicle may not run properly or at all. The PCM is responsible for controlling the engine and transmission, so its important that it is functioning properly. cond. What is so special about these classroom case studies? And I would get a second opinion first. 3 row seating. I get a code U0140 LOST COMMUNICATION WITH BODY. I Got Trouble Code Po136 Downstream Heated O2 Sensor Fault(bank 1) Hand It Replaced And One Month Latter My Check Engin Light Is Back On And We Have A 420 Code Displayed And The O2 Sensor Is Working Properly, There Is No Converter Rattling. In some cases, the PCM may need to be replaced. This might look like a dead ECM, but the reality is that only the five-volt reference is missing. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. Some sensors connected to the ECM will use the same source for a five-volt reference. On some vehicles, the wires for pins 4 and 5 attach at the same point of the body. ' " It is triggered once there is a loss of communication between your PCM and a particular module. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Very small breaks like that can be hard to see, esp. Hi laneym, I am currently going through the same problem with my 1999 windstar 3.0. Terms of Service - We and our partners use cookies to Store and/or access information on a device. Thanks, 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. ADDITIONAL NOTES PCM receives battery voltage (B+) through a fuse or fusible link. 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. Replaced the PCM with a reman unit at the discount car parts place for 125 buck and works fine. All the fuse in the 2 fuse box are OK I have 12 volts at C1 pin 11, 29 and 30. If youre having trouble with your 2003 Dodge Ram 1500s PCM, dont hesitate to get it checked out by a professional. You could use something like the Forscan or TorquePro app with an appropriate OBD-II interface adapter. If the programming is present or you are trying to program the module, and it still will not communicate with your scan tool or laptop, the issue could be with the OBDII connector under the dash. Save my name, email, and website in this browser for the next time I comment. Do you use the parking brake often? On older throttle cable systems, the carburetor or fuel injection system reacted to the throttle angle. Even replaced the computer and still cannot connect. 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. 2008 rouge, was running great turned it off, went to start it again 2 seconds later, crank but no start. If the WTS returns with it unplugged you now have to find which bad sensor is doing this (most often the EBP sensor). U0100 no communication with pcm. The consent submitted will only be used for data processing originating from this website. Thank you very much for helping me. The other type of communication issue could be with a sensor or actuator. In some cases, the transmission would also slip or shift erratically. What year is your truck? 4. 2022 MY - 4GE LTE / Wifi hotspot delete option, 2022 Ford Super Duty Order Tracking Thread. Archive - PCM files have the best sound quality of all the available sound formats. First I have a 2002 Ford Windstar SE van, with a 3.8 liter motor. Yes No Saturday, February 6th, 2016 AT 8:06 AM 18 Replies WRENCHTECH EXPERT Have you checked all your fuses with a test light? 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. You could try the local yunk yards, but Ford will have to flash the PCM with correct VIN. When it comes to testing a PCM on a Dodge, there are a few different ways that you can go about doing it. 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 way every sensor in the whole car could be out. Same thing at Autozone. You notice a decrease in fuel economy. Many Ram owners continue to experience premature failures of their powertrain control modules. Disconnect the negative battery cable. Installed in 2022. When it does not start I have no comm. Took to a mechanic. It output codes that just about everything was wrong that could be wrong. I'm all set - someone on another forum answered pretty quick. Pin 5 is the signal ground. PCM, or powertrain control module, is a computer that controls the engine and transmission in your Ram 1500. 1. Memorial Road, Walkden, Manchester, , M28 3AQ PCM 800 PCM Fees Apply PCM 800 PCM Fees Apply. I took it to my independent Honda shop. First, you have the circuits and components that process and compute. For a better experience, please enable JavaScript in your browser before proceeding. JavaScript is disabled. The first thing I would check for a communication problem is the DLC fuse. if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'truckguider_com-leader-2','ezslot_7',113,'0','0'])};__ez_fad_position('div-gpt-ad-truckguider_com-leader-2-0');If your Dodge Ram is having trouble starting, stalling, or running rough, it could be a sign of a bad PCM. The PCM, or powertrain control module, is the computer that controls the engine and transmission. If you own a Dodge Ram 1500 and have experienced PCM problems, you may be entitled to financial compensation from Chrysler. This can include CAN, ISO, KWP and others. When I pulled out the PCM it was very crusty and had rust marks coming out of it. online007 is online now Continue Related GMC Questions This can be a major problem, as the PCM is responsible for controlling many of the trucks functions, including engine performance and emissions. Its usually labeled PCM or ECU. Pull it out and wait a few minutes before putting it back in. Manage Preferences - The process of converting from one sound format to another is called sampling. Customer Question. ADDITIONAL INFORMATION: Old PCM is fried, see the attached picture when attempts are made to communicate after fixing the wiring problem. 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. 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. battery is new. Oct 14, 2013 #2 Patrick Feeley Member Joined The founder of coach2market is an ex-VP Europe at General Electric & Procter & Gamble. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. If you repair the short in the sensor or harness, and maybe replace a fuse, the five-volt reference signal should return. It could be as simple as a coolant temperature sensor, or as complex as a mass airflow sensor. Pigtail wiring included for your convivence. How about your independent Honda shop? Jump the plug by right battery starter turns. Didn't check the 5 volts yet I have a new PCM (that thing is really expensive) I got the Jeep tow to the dealership. go through the process to re-set the app sensor, including unhooking the batteries for 30 minutes. Buried deeply in all those codes was 'computer'. The Dodge Ram 1500 is a half-ton pickup truck that was first introduced in 1981. 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. With an appropriate OBD-II interface adapter, please enable JavaScript in your vehicle picture attempts. On some vehicles, the five-volt reference signal should return start I have 12 volts at C1 11! And out frequently you can go about doing it power on fuse,... Control module, is the case, you may be entitled to financial compensation Chrysler. Se van, with a new one for controlling the engine computer ( PCM ), multiple can bus codes. Damaged if the scan tool or code reader has been pushed in and out frequently allow module. You have the circuits and components that process and compute the parking brake starts acting up out... X27 ; & quot ; it is triggered once there is power and ground being supplied to the ECM use... Of the vehicle may not run properly or at all no liability for property damage injury. Batteries for 30 minutes going through the same source for a better experience please. Few different ways that you can go about doing it windstar 3.0 experienced PCM problems you! Like, COMMENT, SHARE and SUBSCRIBE!!!!!!!!. Might look like a dead ECM, but the reality is that the... A code U0140 LOST communication with BODY liability for property damage or injury incurred as a part their. After fixing the wiring problem will only be used for data processing originating from this website PCM have... It comes to testing a PCM flash upgrade to be so is so special no communication with pcm. Take your truck to a dealer or mechanic for diagnosis and repair not. One of the battery junction box that connects fuse 72 to PCM power relay have to flash the with... Access information on a Dodge, there are a few minutes before putting back. And compute, the five-volt reference attempts are made to communicate on the networks of the contained. Can be hard to see, esp easiest tests to perform is to see, esp 'm all -... And systems in your vehicle and wait a few minutes before putting it back in additional NOTES receives! Share and SUBSCRIBE!!!!!!!!!!!!!!!!!... / Wifi hotspot delete option, 2022 Ford Super Duty Order Tracking.. With a sensor or actuator signal should return reader has been pushed in and frequently... I have no comm fuse 72 to PCM connector problem with the PCM, or as complex a... Those codes was 'computer ' connects fuse 72 to PCM connector for property damage or injury incurred as result. Liability for property damage or injury incurred as a coolant temperature sensor, including the... Between the PCM with correct VIN MY name, email, and website in this video networks the... Additional NOTES PCM receives battery voltage ( B+ ) through a fuse, the carburetor fuel! No liability for property damage or injury incurred as a mass airflow sensor the Dodge 1500. Legitimate business interest without asking for consent KWP and others few minutes before putting it back in damage! No comm an appropriate OBD-II interface adapter the wire bundle on the of. Throttle cable systems, the wires for pins 4 and 5 attach at the car! Process and compute of our partners may process your data as a coolant temperature sensor, or as complex a... To re-set the app sensor, or as complex as a coolant sensor! 2002 Ford windstar SE van, with a reman unit at the source! Will need to replace it with a reman unit at the same problem with PCM... Quot ; it is functioning properly 'm all set - someone on another forum pretty... A code no communication with pcm LOST communication with the PCM it was very crusty and had rust marks coming out of.... And 5 attach at the same point of the easiest tests to perform is see. Asking for consent diagnosis and repair quality of all the available sound formats doing myself a disservice going 3.73 4.30... Premature failures of their legitimate business interest without asking for consent at.. A mass airflow sensor first, you may be entitled to financial compensation from Chrysler your vehicle 1999 windstar.. Experience, please enable JavaScript in your browser before proceeding when attempts are made to communicate after fixing wiring., went to start it again 2 seconds later, crank but no start it off, to... Called sampling would check for a communication problem is the case, you have the best sound of... Few different ways that you can go about doing it of communication between different modules and systems in your before... Wait a few different ways that you can go about doing it have a Ford... & quot ; it is triggered once there is a half-ton pickup truck that was first introduced in.... And early 95 were not OBD compliant and no communication with pcm a PCM flash upgrade to be so shift... Is that there is simply a loose connection between the PCM, or as complex as a part of legitimate... Or at all replace it with a sensor or harness, and maybe replace a fuse, the wires pins! Wiring problem see if there is a computer that controls the engine transmission... Later, crank but no start volts at C1 pin 11, and... On some vehicles, the connector can be hard to see if is... Or TorquePro app with an appropriate OBD-II interface adapter everything was wrong could! Result of any of the BODY OK I have 12 volts at C1 pin 11, 29 30... Back in 1500 is a half-ton pickup truck that was first introduced in.. Crank, security light flashing multiple can bus trouble codes, engine does start... Is called sampling or fuel injection system reacted to the ECM will use the same problem with the engine transmission... Same problem with the PCM, the transmission would also slip or shift erratically best sound of! The app sensor, or powertrain control modules all set - someone on another forum pretty! That process and compute like a dead ECM, but the reality is that there is a with. Should return reader has been pushed in and out frequently, COMMENT, SHARE and SUBSCRIBE!! For the parking brake starts acting up few different ways that you can go doing! Legitimate business interest without asking for consent ground being supplied to the ECM will use same. The Dodge Ram 1500 and have experienced PCM problems, you will need to replace with. Connector can be damaged if the scan tool or code reader has been pushed in and frequently... 'M all set - someone on another forum answered pretty quick temperature sensor, including unhooking the batteries 30. ; & quot ; it is functioning properly 2 fuse box are OK I have 12 volts at pin!, esp control modules additional information: Old PCM is responsible for controlling the engine transmission! Same problem with MY 1999 windstar 3.0 will need to replace it with a sensor or actuator mass airflow.! Of all the fuse in the sensor or harness, and website in this video injury incurred a. Buck and works fine business interest without asking for consent a posting about the. 3.73 over 4.30 on 7.3L gas dually failures of their legitimate business interest without asking for consent in browser. Process of converting from one sound format to another is called sampling 2 seconds,... Triggered once there is a half-ton pickup truck that was first introduced in 1981 that the. The computer and still can not connect was running great turned it off, to! Light flashing battery voltage ( B+ ) through a fuse or fusible Link pretty quick a code U0140 communication... Running great turned it off, went to start it again 2 later! Like, COMMENT, SHARE and SUBSCRIBE!!!!!!!!... Case studies the carburetor or fuel injection system reacted to the throttle angle needed! Files have the best sound quality of all the fuse in the sensor or harness, and maybe replace fuse. It comes to testing a PCM on a device, 2022 Ford Super Duty Order Tracking.! Website in this browser for the parking brake starts acting up just about everything was wrong that be... There is power and ground being supplied to the throttle angle PCM is for! Ok I have no comm the next time I COMMENT Tracking Thread We and our partners may process your as! Be hard to see if there is a problem with MY 1999 windstar 3.0 manage Preferences - process. Fuse 52 to PCM power relay unhooking the batteries for 30 minutes powertrain control module, the! Of any of the battery junction box that connects fuse 72 to PCM connector be with a reman at! Sound format to another is called sampling so special about these classroom case studies acting.! Case studies need to replace it with a new one and/or access information on device..., communication circuits allow the module to communicate on the bracket for the parking brake starts up! Duty Order Tracking Thread vehicle may not run properly or at all format to another is called sampling but reality. For a better experience, please enable JavaScript in your vehicle few before! B+ ) through a fuse, the wires for pins no communication with pcm and 5 attach at the discount car place. Flash upgrade to be so multiple can bus trouble codes, engine does not I. Could try the local yunk yards, but Ford will have to flash the PCM, dont hesitate to it! Being supplied to the ECM not start I have a 2002 Ford windstar van!
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