Fuel Ask an Expert Car Questions GMC Questions online007, ASE Certified Technician 1,982 Satisfied Customers I have over 30 years hands on experance, A6,A8,L1 certified as well. Its usually labeled PCM or ECU. Pull it out and wait a few minutes before putting it back in. 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. Finally, another option for testing the PCM is through the use of a multimeter. 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. Mar 31, 2021. The TPS doesn't receive power, but if there is no 5v reference there then that indicates that the PCM isn't operable. You can also follow me on:Facebookhttp://www.facebook.com/revvedupknowledge Instagramhttps://www.instagram.com/revvedupknowledge/ For a better experience, please enable JavaScript in your browser before proceeding. 2. First I have a 2002 Ford Windstar SE van, with a 3.8 liter motor. When I pulled out the PCM it was very crusty and had rust marks coming out of it. will have to keep that in mine. 2003-2006 SAAB 9-3 2.0L FWD ECU ECM PCM Engine Computer Module 55567225 . When key is turned to run no glow plug light, no fuel pump prime. 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. 3. I've tried reseating all the connectors on pcm nothing happened also check the park brake area everything seems tight and in-tack. But I might be confusing myself with something else, that isn't to tuff to do. 3 row seating. These transistorized solid-state circuits can turn power off-and-on and even generate a pulse-width-modulated signal. No way every sensor in the whole car could be out. When it does not start I have no comm. No Smokers. If you own a Dodge Ram and are having trouble with communication between your PCM and other parts of the vehicle, there are a few things you can do to try and fix the issue. *Ignition ON/NBA** BUS+(2) should read 0V BUS (10) should read 5V Thank you very much for helping me. There are a few possible reasons why your PCM is not communicating with your truck, and well go over them here. You should hear both the PCM relay and the glow plug relay click. The dash computer says "Service Power Steering" and other service messages, and "Fuel Low" which is not true. Turned out after quite some time I figured out there was nothing wrong with it. If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. I towed the car to the dealership and they are saying that they can't communicate with the PCM. Another way to test the PCM is through the use of an oscilloscope. got power on fuse 52, continuity from fuse 52 to pcm connector. There was power to OBD port. Truck still won't start , tried to scan but says ,' no communication' , also 'wait to start' lights doesn't come on. Third, you have circuits that receive information from sensors and generate reference voltages. In some ECUs, the crankshaft position, camshaft position and maybe the MAP sensor will use the same five-volt source. This website is using a security service to protect itself from online attacks. 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. ADDITIONAL INFORMATION: Old PCM is fried, see the attached picture when attempts are made to communicate after fixing the wiring problem. 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. i tried hooking up our genesis scanner to see if it would communicate. So, again, the communication issue could be with the sensor or actuator, or the problem could be on the modules circuit board. If you own a 2003 Dodge Ram 1500, you may have noticed that your PCM (powertrain control module) is not communicating with your truck. 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. JavaScript is disabled. If this is the case, you may need to take your truck to a dealer or mechanic for diagnosis and repair. Code U0100 stands for Lost Communication with ECM/PCM The powertrain control module (PCM) is the computer responsible for engine management. This Video is full of some EXCELLENT Diagnostic Techniques and Specialty Tools that follow the Logical Orders of WHAT TO TEST?.1,st, 2nd, 3rd.Etc., when Investigating a No Communication Problem with the ECU-PCM.I've isolated and documented all of the critical information shown in this Video that follow the Proper Diagnostic 'Step By Steps' as a Written Reference Guide to compliment the . 1. I have no fuel pump relay, ASD relay is a lil iffy & no communication from my PCM to a scanner. Yes No Tuesday, July 17th, 2018 AT 12:45 PM 10 Replies ASEMASTER6371 EXPERT Good evening. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules. U0100. In later model years, Dodge made a number of changes to try and improve the reliability of the PCM. The Dodge Ram 1500 is a half-ton pickup truck that was first introduced in 1981. Fuse 49 and 50 also have power. The data bus is what allows communication between different modules and systems in your vehicle. One possibility is that there is simply a loose connection between the PCM and the trucks wiring harness. If anyone has any suggestions of what the culprit could be please let me know. If that solves it, then the dealer was right. 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. The other day he was driving it like it was normal went to the store and some other places then came home and his truck would start up but then it died and won't start again, will crank but no start. 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. I am hoping for a miracle and someone on here can solve my problem. Plus my ABS light comes on every now and then, but not very often. Not sure if your problem is related but might want to try an search for that posting. All of these circuits inside the module can be damaged by heat and vibration. No crank no start. Save my name, email, and website in this browser for the next time I comment. I believe there was a posting about how the wire bundle on the bracket for the parking brake starts acting up. I had that problem with another ford, but similar 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? I took it to my independent Honda shop. Hello everyone, Looking for some ideas on what I may be missing. I had the truck die on me while driving last week. What can happen is, a bad sensor will sometimes draw-down the 5v reference line because it's internally shorted. Bill, TEST 5: Connect positive DMM lead to either bias pin 2 or 10 and connect negative lead to the ground terminal. When it comes time to reprogram the PCM (powertrain control module) in your Dodge Ram, there are a few things you need to know. Performance & security by Cloudflare. Don't know anything about the torque App so no help there. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. Helga Melgar, MBA, PCM-Marketing Management AMA certified marketing and communications professional Thanks, Nice work, we are here to help, please use 2CarPros anytime. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. Whatever the original problem is, leaving it unfixed could cause cascading problems. Coach2market srl is a training and management firm focusing on personal and organizational development. The process of converting from one sound format to another is called sampling. They just didn't know what they were doing. If this is the case, you will need to replace it with a new one. Radio - Aftermarket 3. Check for an open circuit. I Have Driven The Car Without Issue For 1000kms Over The Last Month. Cheers! Jump the plug by right battery starter turns. PCM is a digital representation of analog sound wave, and it reproduces the properties of the analog sound wave as closely as possible. I get a code U0140 LOST COMMUNICATION WITH BODY. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Codes after cleared: instrument cluster uo100 lost communication to pcm u300a-64 ignition switch. 1. Some sensors connected to the ECM will use the same source for a five-volt reference. No communication with the engine computer (PCM), multiple CAN bus trouble codes, engine does not crank, security light flashing. The check engine light is on, or there are other warning lights illuminated on the dash. This can be performed by using the OBDII connector. Learning how to perform drivetrain diagnostics and in-the-car repairs is important. In some cases, the transmission would also slip or shift erratically. not sure if its a wiring problem or if its the PCM itself. If there is high resistance in a module or part of the wiring harness it can bring down the network. Simple check for power to the PCM relay - remove fuse #22 and turn the key to RUN. Sent from my Rock using a Chisel go through the process to re-set the app sensor, including unhooking the batteries for 30 minutes. Took to a mechanic. 2003 . 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. DTC Detection Condition. No communication from PCM. when they key is rotated from run to accy. Over time, the oil filter can collect enough contaminants to become restricted. I meant to call this the Powertrain Control Module. If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. Advertising - Using a scan tool to communicate with different modules can confirm operation and the source of communication codes. Archive - Buried deeply in all those codes was 'computer'. No Code, just that message. In early model Rams, the PCM was known to fail prematurely. Next, try resetting the PCM by disconnecting the battery for 30 seconds. Has anyone run into this problem. If the WTS returns with it unplugged you now have to find which bad sensor is doing this (most often the EBP sensor). (Merged), I have the same problem with mine. Do not connect to the body or chassis ground but to the battery terminal directly. and then will be a no crank if I rotate the key back to start. Pin 16 is the positive voltage side being supplied to the ECM. Maybe remove them, spray with WD40 and re-seat. Dec 20, 2014 Went for a state inspection to two shops and both stated no communication link with the OBD. Here are some tips to follow when replacing a spark plug. Manage Preferences - 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. Jan 5, 2013. Ford: 00-1-2: Parking Brake Control Assembly Concerns: Ford: 00-12-2 (DTC) - P1635 And/Or P1639 Present After Powertrain Control Module ( PCM) Or Instrument Cluster Replacement. Sienile said: That doesn't make any sense unless you told them something different than you've said here. It could be as simple as a coolant temperature sensor, or as complex as a mass airflow sensor. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. (Merged). Installed in 2022. 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. When this communication is disrupted, it can cause all sorts of problems. Does the Wait-To-Start light come on as it should? First, I tried the search tool, I really didhaha. 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. Oct 14, 2013 #2 Patrick Feeley Member Joined The problem was the Climate Control. I am sure there cant be as much wrong as the error codes say. online007 is online now Continue Related GMC Questions Checked wiring and fuses even swapped PCM with a used one that was good. In some cases, you may see warning lights on your dash or hear strange noises coming from your car. Second, communication circuits allow the module to communicate on the networks of the vehicle with other modules. Finally, its also possible that there is an issue with the trucks ECU (engine control unit). 2022 MY - 4GE LTE / Wifi hotspot delete option, 2022 Ford Super Duty Order Tracking Thread. Since its inception, the Ram 1500 has been plagued with PCM problems. -Check for voltage pin3 CanC+ ABS harness side Trailer Towing, Other; Brakes, Electrical, Hitches, Weight Distribution & CDL Discussion, Pre-Power Stroke Diesel (7.3L IDI & 6.9L), Bio-diesel, Propane & Alternative Diesel Engine Fuels, Explorer, Sport Trac, Mountaineer & Aviator, 1987 - 1996 F150 & Larger F-Series Trucks, 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks, 1973 - 1979 F-100 & Larger F-Series Trucks, 1967 - 1972 F-100 & Larger F-Series Trucks, 1961 - 1966 F-100 & Larger F-Series Trucks, 1957 - 1960 F100 & Larger F-Series Trucks, 1948 - 1956 F1, F100 & Larger F-Series Trucks, 1968-Present E-Series Van/Cutaway/Chassis, Nite, Nascar & Other Limited Edition Ford Trucks, Supercharger, Turbocharger, Nitrous Oxide & Water/Methanol Injection, Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W), Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460), FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428), 335 Series- 5.8/351M, 6.6/400, 351 Cleveland, Y-Block V8 (239, 272, 292, 312, 317, 341, 368), Audio & Video Systems, Navigation, Satellite Radio & Mobile Electronics, Bed Covers, Tonneau covers, Toppers/Canopies & Bed liners, Brakes, Steering, Suspension, Tires, & Wheels, Clutch, Transmission, Differential, Axle & Transfer Case, Fuel Injection, Carburetion & Fuel System, Vendor Specials, Discounts, Product Announcements & Group Buys, https://www.ford-trucks.com/forums/1umb-olman.html. 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 32,31,2 Power O.k. Code reader cannot connect. You notice a decrease in fuel economy. NOTE: An open circuit or high ground resistance means that the PCM will never enter diagnostic mode. They said that the SKIM was bad. Content on odyclub.com is generated by its users. The solder that connects the components to the circuit board can also fail. 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. Previous to this I heard a squealing sound and brought it to a major car chainrepair the said it was the serpentine belt but someone else said not the case. (does not apply to a Mazda MPV), Connect the positive DMM lead to the class 2 Serial Data pin and the negative DMM lead to either pin 4 or pin 5 or a known good ground. Do not connect to the body or chassis ground but to the battery terminal directly. 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. Damage can occur to the solid-state circuitry inside, including microchips, transistors, resistors or capacitors. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. 2013 Ford Escape Problems You Need To Know About. I Have A 1996 Ford Windstar That Has Currently Done 233,000kms. 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 . Went to start it couple days later nothing. Is this an Engine Computer or a Body Control Module? All the fuse in the 2 fuse box are OK I have 12 volts at C1 pin 11, 29 and 30. OBS uses non-standard OBDII protocol. Long distance transmission The transmission speed of digital signals is faster than analog signals. 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 . 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. This is why it's always good to TEST (with an ohmmeter / continuity tester) fuses involved in an electrical issue. 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.