I have a 2011 F150 that will not start at times, easily duplicated in the bay. Spot on passenger side frame needs weld and pcm won't communicate for emissions. The problem was the Climate Control. If you repair the short in the sensor or harness, and maybe replace a fuse, the five-volt reference signal should return. All stock The truck ran hard and strong for 8 thousand miles exactly.. And died. An example of data being processed may be a unique identifier stored in a cookie. Free shipping . 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 (fuel filler tube, o2 sensor, alternator/battery 4 yrs. The other type of communication issue could be with a sensor or actuator. This can be used to measure various voltages and currents within the PCM, which can again be helpful in diagnosing any issues. It loses comm. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules. 2. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Codes after cleared: instrument cluster uo100 lost communication to pcm u300a-64 ignition switch. 3.108.155.32 My engine light is on, but the dealer cannot read the codes. 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. Fortunately, resetting the PCM is a pretty easy process. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? Most generic scanners won't communicate with these trucks. DTC Output from. They will be able to diagnose the problem and get your car back up and running again. Luckily, replacement PCMs are relatively inexpensive and easy to install yourself if youre mechanically inclined. The stock gauges quit working, check gauges, my cts2 lost communications with the truck, all wiring appeared fine. 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. No dvd player. *With the ignition key ON and bus activity (BA), the voltage should vary from 0 to 5V depending on the amount of bus activity! Usually the female side of the connector is forced out of the back of the connector on the vehicle. I meant to call this the Powertrain Control Module. This can be performed by using the OBDII connector. 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. To start viewing messages, select the forum that you want to visit from the selection below. Terms of Service - Replaced the PCM with a reman unit at the discount car parts place for 125 buck and works fine. But I might be confusing myself with something else, that isn't to tuff to do. Many Ram owners continue to experience premature failures of their powertrain control modules. Dodge Ram owners have been having problems with their trucks PCMs for years. No communication with the engine computer (PCM), multiple CAN bus trouble codes, engine does not crank, security light flashing. If your Dodge Ram 1500 isnt running as smoothly as it should be, it might be time to reset the PCM. Check for an open circuit. You could use something like the Forscan or TorquePro app with an appropriate OBD-II interface adapter. No Smokers. You can email the site owner to let them know you were blocked. Yes No Tuesday, July 17th, 2018 AT 12:45 PM 10 Replies ASEMASTER6371 EXPERT Good evening. Is this an Engine Computer or a Body Control Module? 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. Helga Melgar, MBA, PCM-Marketing Management AMA certified marketing and communications professional The engine runs erratically, or Rough idling/misfiring. If there is high resistance in a module or part of the wiring harness it can bring down the network. 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. I had that problem with another ford, but similar pcm. Next, try resetting the PCM by disconnecting the battery for 30 seconds. I had the truck die on me while driving last week. Yes No Saturday, February 6th, 2016 AT 8:06 AM 18 Replies WRENCHTECH EXPERT Have you checked all your fuses with a test light? 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 are some tips to follow when replacing a spark plug. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? old, starter) Glass exc. Thanks guys. 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. Since most networks on the vehicle can be accessed through the OBDII connector, this tool helps you observe if the network is active, open or shorted. Some have even had to replace the entire unit. No error or any communication with the reader. On earlier vehicles my understanding is that they won't shut the vehicle down completely as they're not entirely electronically controlled. 3. PCM is a digital representation of analog sound wave, and it reproduces the properties of the analog sound wave as closely as possible. Took to a mechanic. Trouble Area. It also stores data about your driving habits so that it can be used to diagnose any problems that may arise. $294.90 . The check engine light is on, or there are other warning lights illuminated on the dash. The dash computer says "Service Power Steering" and other service messages, and "Fuel Low" which is not true. I Have A 1996 Ford Windstar That Has Currently Done 233,000kms. Sent from my Rock using a Chisel Note, it is possible to get some valuable information from a used un-programmed salvage yard unit. When it does not start I have no comm. On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. Thanks for the report. They just didn't know what they were doing. JavaScript is disabled. Jan 5, 2013. Ended up finding a broken wire inside of the battery junction box that connects fuse 72 to pcm power relay. Now just waiting on those guys to figure out the 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. anybody have some advice on what we need to do? The first and most common way is to use a code reader or scanner. Hello everyone, Looking for some ideas on what I may be missing. Do you have the EVTM, by any chance? Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more! Engine light blinking. Now I am going through a check engine light on with vibrations and my diagnostic port does not work (AutoZone says I have a short or something somewhere in my dash). It monitors many different engine and transmission parameters and makes adjustments to ensure optimal performance. It has no connection to the PCM. In this video I will show you how to fix your no start/no communication issue on your 2002 (and other years same as this model) Isuzu Rodeo/Honda Passport (oops I said Pilot in the video. Go back under the hood and install fuse #22. 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. all Acessories Off. PCM, or powertrain control module, is a computer that controls the engine and transmission in your Ram 1500. Pigtail wiring included for your convivence. Often, the connector can be damaged if the scan tool or code reader has been pushed in and out frequently. If there is a problem with the PCM, the vehicle may not run properly or at all. Many new parts. 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. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. 3 row seating. Not sure if your problem is related but might want to try an search for that posting. This should fit all Saab 9-3 from 2003-2007 and may fit up to 2011. About Us - Once this happens, the vehicle may shut off and it may not restart unless you address the issue triggering the code.May 2, 2021 U0100 Code: Lost Communication with ECM/PCM "A" Rear power hatch not working. Just because its red doesnt mean its all the same. 1. Sometimes, there will be a DTC for the circuit; sometimes there wont be a code. Please No Off Topic, Do Not Sell or Share My Personal Information. 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. Archive - Do not connect to the body or chassis ground but to the battery terminal directly. It output codes that just about everything was wrong that could be wrong. I took it to my independent Honda shop. odyclub.com is not in any way affiliated with Honda Motor Company. Contact Us - All grounds on PCM harness are good. This can include CAN, ISO, KWP and others. Check the fuse box (Power Panel), it might be the reason why PCM isnt able to receive power as well as communicate. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. 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 What fuse is that? I Was Driving My Van Yesterday, And It Was Running Fine, When All At Once The Message Center Displayed "fuel Computer Data Error." I'm all set - someone on another forum answered pretty quick. 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. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. (Merged), I have the same problem with mine. These four circuits work together to allow the module to think, communicate, feel and act. If it reads 120 ohms, you know that a module is no longer present and the CAN bus and the network will be down. But, a lot of the damage to an ECM comes from the connected components. Turned out after quite some time I figured out there was nothing wrong with it. in the lighting in the cab. i tried hooking up our genesis scanner to see if it would communicate. Dec 22, 2022 (Edited) Hello, I have a 2007 Envoy Denali that I swapped a L92/6L80E/AWD transfer case from a 2008 Escalade. Jump the plug by right battery starter turns. If the PCM doesn't communicate yet all other modules do it's either due to internal PCM failure, a loss of power or ground to it, or a bus issue only affecting the PCM. not sure if its a wiring problem or if its the PCM itself. Even tried with connector on transmission. Cleaned Intake. Apr 15, 2014. Test 3, which terminal is for serial data? Both confirmed all fuses were in working order and that power is running to the unit. 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 Each time, I recieved a "Link Error" message. Seat module - driver 4 . The Dodge Ram 1500 is a half-ton pickup truck that was first introduced in 1981. Most ECMs are not plug and play parts. In early model Rams, the PCM was known to fail prematurely. I had no pcm communication with scanner, no tach and no WTS light. Went to start it couple days later nothing. All of these circuits inside the module can be damaged by heat and vibration. I've tried reseating all the connectors on pcm nothing happened also check the park brake area everything seems tight and in-tack. 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 Took all 3 connectors at pcm out and blowed air through and sprayed W.D nothing. Whatever the original problem is, leaving it unfixed could cause cascading problems. 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. Cloudflare Ray ID: 78ba41583b281bd6 If it gets out of whack, it can cause all sorts of problems. The consent submitted will only be used for data processing originating from this website. 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. All of the scan tools power up as if the port is working but can't connect. Recently the CEL came on. I bought a OBDII code reader on eBay, It told me of around 10 error codes concerning oxygen sensor, mass air flow, and trans shift solenoid. An open ground or power (B+) circuit on a fuel-injected engine removes power from the ECM and prevents the engine from starting. 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). I had the same issue, dead pedal, and no communication with a snap on verus. The only mod that was installed on the truck was a cts2. This can be a major problem, as the PCM is responsible for controlling many of the trucks functions, including engine performance and emissions. 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: Privacy Statement - One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. 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. 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. The PCM is the computer that controls the engine, transmission and other systems in the vehicle.