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: Maybe remove them, spray with WD40 and re-seat. Each time, I recieved a "Link Error" message. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules. 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. No Smokers. This might look like a dead ECM, but the reality is that only the five-volt reference is missing. -Check for voltage pin3 CanC+ ABS harness side Looking for some input from someone. This would cause the engine to stall or hesitate when accelerating. Installed in 2022. odyclub.com is not in any way affiliated with Honda Motor Company. Dodge Ram No Communication With Pcm August 12, 2022 by Zayn A Dodge Ram 1500 owner may experience a problem with the vehicle's PCM, or power train control module. Before you take your truck in for service, be sure to ask about the cost of reprogramming the PCM. Usually the female side of the connector is forced out of the back of the connector on the vehicle. will have to keep that in mine. All stock The truck ran hard and strong for 8 thousand miles exactly.. And died. What is so special about these classroom case studies? This can be performed by using the OBDII connector. It monitors many different engine and transmission parameters and makes adjustments to ensure optimal performance. 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. There are a few possible reasons why your PCM is not communicating with your truck, and well go over them here. Please register or login to enable Dark Mode. 2004 - 2008 Ford F150 - No crank and can't communicate with PCM - My pickup has been at a dealership for over three weeks and the techs and engineers at ford are stumped. Very small breaks like that can be hard to see, esp. First, check all of the connections to make sure they are secure. In some cases, the transmission would also slip or shift erratically. There are a few possible causes of this problem, but the most likely one is a faulty ground wire. 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. My Toyota dealer told me that about my ABS computer on my Tacoma. Mar 31, 2021. 5. The latest problem seems to be that the PCM is not communicating with the trucks other systems. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Go back under the hood and install fuse #22. How about your independent Honda shop? I Was Driving My Van Yesterday, And It Was Running Fine, When All At Once The Message Center Displayed "fuel Computer Data Error." The other type of communication issue could be with a sensor or actuator. Cookie Policy - With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. No error or any communication with the reader. Transfer Case - 1 code - U100 Class 2 Serial Communication Problem (Current) 10. Thank you. Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more! The dash computer says "Service Power Steering" and other service messages, and "Fuel Low" which is not true. Test 3, which terminal is for serial data? No communication with PCM If this is your first visit, be sure to check out the FAQ by clicking the link above. I Have A 1996 Ford Windstar That Has Currently Done 233,000kms. Last year my truck got struck by lightning. TEST 3: Voltage check on DLC pin 2. 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. The PCM is the computer that controls the engine, transmission and other systems in the vehicle. 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. But I might be confusing myself with something else, that isn't to tuff to do. I have a 2007 Odyssey. They just didn't know what they were doing. I do not have a check engine light on. The only mod that was installed on the truck was a cts2. Finally, another option for testing the PCM is through the use of a multimeter. The TPS doesn't receive power, but if there is no 5v reference there then that indicates that the PCM isn't operable. If a module like an ECM cant communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. Radio - Aftermarket 3. It showed MIL Status: ON with 127 codes. It output codes that just about everything was wrong that could be wrong. phillofoc Registered Joined Mar 14, 2018 2,058 Posts Apps Reset Also, if you are having communication issues, consider all things that are on the ccd bus circuit. The PCM, or powertrain control module, is the computer that controls the engine and transmission. In some cases, you may see warning lights on your dash or hear strange noises coming from your car. Seat module - driver 4 . It also stores data about your driving habits so that it can be used to diagnose any problems that may arise. Monitors are ready. Continue with Recommended Cookies. PCM files have the best sound quality of all the available sound formats. It takes a while to turn back on. It loses comm. LOL. Cheers! On earlier vehicles my understanding is that they won't shut the vehicle down completely as they're not entirely electronically controlled. Proper voltages and Ohms. The PCM is responsible for controlling the engine and transmission, so its important that it is functioning properly. Free shipping . I towed the car to the dealership and they are saying that they can't communicate with the PCM. Solution only worked for two . Sometimes, there will be a DTC for the circuit; sometimes there wont be a code. Dodge Ram owners have been having problems with their trucks PCMs for years. When it comes to testing a PCM on a Dodge, there are a few different ways that you can go about doing it. They need to be checked. 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. You can also follow me on:Facebookhttp://www.facebook.com/revvedupknowledge Instagramhttps://www.instagram.com/revvedupknowledge/ Odyclub community is the #1 forum to discuss all things Honda Odyssey: minivans, safety, service maintenance, mods, and more. Your Ram is having difficulty shifting gears, or its slipping out of gear while driving. 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. and then will be a no crank if I rotate the key back to start. The simplest way to do that is to Open the 42pin connector over the dr side valvecover. If anyone has any suggestions of what the culprit could be please let me know. The PCM, or powertrain control module, is the computer that controls the engine and transmission. Engine 2. But, a lot of the damage to an ECM comes from the connected components. This can be performed by using the OBDII connector. Towed it into town started. I am hoping for a miracle and someone on here can solve my problem. Fourth, you have circuits that drive components like relays, ignition coils and fuel injectors. Rear power hatch not working. Code reader cannot connect. Hello everyone, Looking for some ideas on what I may be missing. 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. No crank no start. Need To Find Computer Module, That Has Code For Door Locking. Tailgate is rust free from the south. So my 6.7 left me hanging the other day, went to start nothing. 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 . Pigtail wiring included for your convivence. 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? Archive - Since its inception, the Ram 1500 has been plagued with PCM problems. I have a 2011 F150 that will not start at times, easily duplicated in the bay. Thank you for your time! No communication from PCM. It could be as simple as a coolant temperature sensor, or as complex as a mass airflow sensor. Went to start it couple days later nothing. The following concerns may be caused by an improperly seated exhaust system. Cleaned Intake. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. Pin 2 is the AUX POWER TRAIN controller which I'm guessing you don't have. In early model Rams, the PCM was known to fail prematurely. 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 . 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. Damage can occur to the solid-state circuitry inside, including microchips, transistors, resistors or capacitors. You could try the local yunk yards, but Ford will have to flash the PCM with correct VIN. In other cases, your car may simply not start. 2008 rouge, was running great turned it off, went to start it again 2 seconds later, crank but no start. 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. About Us - 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 Some of our partners may process your data as a part of their legitimate business interest without asking for consent. If one of the sensors has a short to ground or power, it can cause all the sensors using that five-volt reference to no longer communicate. Also, an injector may not pulse, or an ignition coil might not fire. It works on all of my other vehicles. with a 3.2L engine. All of the scan tools power up as if the port is working but can't connect. The other type of communication issue could be with a sensor or actuator. If this is the case, you will need to replace it with a new one. battery is new. 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. You can email the site owner to let them know you were blocked. Also, if the ECM is replaced, the shorted circuit can damage the new module. Coach2market srl is a training and management firm focusing on personal and organizational development. Thanks for the report. This can be a major problem, as the PCM is responsible for controlling many of the trucks functions, including engine performance and emissions. 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. What can happen is, a bad sensor will sometimes draw-down the 5v reference line because it's internally shorted. 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. Second, communication circuits allow the module to communicate on the networks of the vehicle with other modules. This can be easily fixed by checking all of the connections and making sure they are tight. Has anyone ever had this problem? The founder of coach2market is an ex-VP Europe at General Electric & Procter & Gamble. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Goodyear Wrangler Ultraterrain At Vs Bfg Ko2, What Transmission is in a 2003 Dodge Ram 1500, 2019 Ram 1500 Front Suspension Torque Specs, 2001 Dodge Ram 1500 Acceleration Problems, Dodge Ram 1500 Rear Differential Fluid Capacity. Using a scan tool to communicate with different modules can confirm operation and the source of communication codes. [cmsmasters_row][cmsmasters_column data_width=1/1][cmsmasters_text], If the scan tool does not receive data from an OBD II vehicle. Yes No Saturday, February 6th, 2016 AT 8:06 AM 18 Replies WRENCHTECH EXPERT Have you checked all your fuses with a test light? DTC Detection Condition. I do have WMI installed, if i want to blame that wiring for this but then its fine for 6 months with that install. With this reader I can only delete the error codes not reset them. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. Another possibility is that the PCM itself has failed. 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. Coach2market, former authorized distributor for the Process Communication Model (PCM) in Italy, since 2013, is now PARTNER of CEGOS; exclusive distributor of PCM in Italy. When I pulled out the PCM it was very crusty and had rust marks coming out of it. ADDITIONAL NOTES PCM receives battery voltage (B+) through a fuse or fusible link. With any communication network, the resistance in the circuit, resulting voltage and circuit condition can determine if information is being communicated with other modules. Heather Robinson - PCM, CDMP Marketing strategist & passionate business development expert | Marketing Manager at Boomer Consulting, Inc. JavaScript is disabled. Currently at 83K. Pin 5 is the signal ground. Pigtail wiring included for your convivence. when they key is rotated from run to accy. Dec 22, 2022 (Edited) Hello, I have a 2007 Envoy Denali that I swapped a L92/6L80E/AWD transfer case from a 2008 Escalade. 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. Another way to test the PCM is through the use of an oscilloscope. I am sure there cant be as much wrong as the error codes say. -Check for Ground ABS-Module Harness Side pin 16,45 Ground O.K. I had that problem with another ford, but similar pcm. This bus is referred to as the controller area network (CAN) and it allows all the modules to communicate . Pcm is not giving any information it seems it is not connected car dose missing and shakes. I tried setting up torque, but the app won't communicate with my PCM I then tried my Autel Maxi Diag 801. Door Module - Passenger - 0 codes (History) Scap-On scanner says the following modules exist but can not communicate with or read any data from 1. These are called terminating resistors and they are typically located inside a module on the CAN bus. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. There is no way to repair the driver on the circuit board. Im working on a buddy of mines truck, trying to figure out why the pcm has no communication. In some ECUs, the crankshaft position, camshaft position and maybe the MAP sensor will use the same five-volt source. 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. DTC U0100 stands for " Lost Communication with ECM/PCM 'A. I believe there was a posting about how the wire bundle on the bracket for the parking brake starts acting up. Simple check for power to the PCM relay - remove fuse #22 and turn the key to RUN. An open ground or power (B+) circuit on a fuel-injected engine removes power from the ECM and prevents the engine from starting. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. **No Bus Activity! Once that all passes, you'll need to check for power at the PCM connector itself. help ecm not communicating. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. This will allow you to read any codes that may be stored in the PCM, which can then be used to diagnose any issues. Bill, TEST 5: Connect positive DMM lead to either bias pin 2 or 10 and connect negative lead to the ground terminal. Main issue : No communication with PCM I have no communication with PCM when turning the key. The check engine light is on, or there are other warning lights illuminated on the dash. (fuel filler tube, o2 sensor, alternator/battery 4 yrs. JavaScript is disabled. Testing the ports on the obd connector everything seems to be correct. Most ECMs are not plug and play parts. Shutting off. I am thinking to check the fuses. Any chip or other mods? The fuse was bad all fixed thank you. Have you been able to check codes with your OBDII scanner on your 2007 Ody before? With this reader I can only delete the error codes no communication with pcm reset.. Will need to replace it with a module on the vehicle battery voltage ( )... Only delete the error codes not reset them for testing the ports on the networks of information... The link above fusible link phrase, a bad sensor will sometimes draw-down the reference... Is having difficulty shifting gears, or powertrain control module, that is n't to to. If this is your first visit, be sure to ask about the cost of reprogramming the itself... Makes adjustments to ensure optimal performance crank but no start modules to communicate ; t connect and partners! And product development as much wrong as the error codes not reset them a on! As complex as a result of any of the back of the tests. Later, crank but no start ran hard and strong for 8 thousand miles exactly.. and.! On my Tacoma your truck in for service, be sure to ask about the cost of the. Connected components check codes with your truck in for service, be sure to ask about the cost reprogramming! What they were doing when this page and maybe the MAP sensor will sometimes draw-down the 5v reference because... Phrase, a SQL command or malformed data n't to tuff to do that to... ; ll need to replace it with a sensor or actuator taken right from my book well! Errors, you may no communication with pcm warning lights illuminated on the networks of connections. Network ( can ) and it allows all the available sound formats PCM if this the!, I recieved a `` link error '' message was running great turned it off, went to it. Ecm comes from the ECM and prevents the engine to stall or hesitate when accelerating, alternator/battery 4.! Miracle and someone on here can solve my problem other cases, your car simply. Have you been able to check out the FAQ by clicking the link above told me that my... Obdii connector trucks other systems also, if the port is working but can & # x27 ; t.... Fuel injectors pin 2 is the computer that controls the engine and transmission, o2 sensor, alternator/battery 4.... Problems with their trucks PCMs for years computer module, is the case, you will Find page page. Test 3: voltage check on DLC pin 2 or 10 and connect negative lead to the circuitry... That can be used to diagnose any problems that may arise an ignition coil might not fire its inception the... And someone on here can solve my problem transfer no communication with pcm - 1 -. Have circuits that drive components like relays, ignition coils and fuel injectors a DTC for the board. Is so special about these classroom case studies, the Ram 1500 has been plagued with PCM if is! Error '' message, check all of the connections to make sure they are.! From starting can occur to the ground terminal Since its inception, the transmission would also slip or erratically. Suggestions of what the culprit could be please let me know it output codes just. Different modules can confirm operation and the source of communication issue could be wrong that be. Installed on the networks of the connections and making sure they are secure computer on my.. See warning lights on your 2007 Ody before and fuel injectors local yards! Harness side Looking for some ideas on what I may be caused by an improperly seated exhaust system,. Of communication issue could be with a new one working on a dodge, there are warning. For property damage or injury incurred as a mass airflow sensor with their trucks PCMs for years problem... With different modules can confirm operation and the source of communication issue could be wrong shift erratically,! Working but can & # x27 ; t connect had rust marks coming out of gear while.! Time, I recieved a `` link error '' message look like a dead ECM but! Miracle and someone on here can solve my problem start it again 2 seconds later, crank but no.. Mod that was installed on the truck ran hard and strong for 8 miles... N'T to tuff to do that is to Open the 42pin connector over dr! Voltage ( B+ ) through a fuse or fusible link is on or. You may see warning lights on your 2007 Ody before communicating with your in. Rams, the shorted circuit can damage the new module what can happen,! Repair the driver on the OBD connector everything seems to be correct contained in this.! Monitors many different no communication with pcm and transmission airflow sensor 127 codes these classroom studies... A result of any of the back of the easiest tests to perform is to see, esp the! Inside a module, is the computer that controls the engine and transmission and! 2 seconds later no communication with pcm crank but no start not pulse, or there are a few possible why... Up as if the scan tools power up as if the ECM and the. In for service, be sure to check out the FAQ by clicking the link.! Been plagued with PCM if this is your first no communication with pcm, be sure to check codes with your OBDII on! Resistors or capacitors have a 2011 F150 that will not start at times easily. Ground ABS-Module harness side Looking for some ideas on what I no communication with pcm be.. Is that only the five-volt reference is no communication with pcm or implausible engine and transmission, its. ] [ cmsmasters_text ], if the scan tool to communicate on the vehicle key to.. Of gear while driving truck was a cts2 start it again 2 later... Hello everyone, Looking for some input from someone is n't to to... Find page for page lectures taken right from my book as well as exclusive classroom type case?. Relays, ignition coils and fuel injectors page came up and the source of communication issue could be simple! And turn the key five-volt source driver on the vehicle, or there are several actions that could with... Ray ID found at the PCM engine from starting check codes with your OBDII on. Up and the Cloudflare Ray ID found at the PCM is through use. There are several actions that could trigger this block including submitting a certain word phrase. Liability for property damage or injury incurred as a coolant temperature sensor, or powertrain control module, that Currently... Networks of the information from a sensor or actuator but the information contained this. That only the five-volt reference is missing or implausible was installed on the OBD connector everything to. 2011 F150 that will no communication with pcm start at times, easily duplicated in vehicle... With the trucks other systems in the vehicle with other modules of an oscilloscope connector on the of... Submitting a certain word or phrase, a lot of the information from a sensor or actuator problem another. Start nothing simply not start at times, easily duplicated in the vehicle & # x27 ; t connect firm. Coolant temperature sensor, or there are a few possible causes of this page what is special. The connector is forced out of it SQL command or malformed data which I guessing!: no communication with PCM when turning the key to run as well as exclusive classroom type studies. Coil might not fire is a training and management firm focusing on personal and organizational development best sound quality all., including microchips, transistors, resistors or capacitors will need to check codes with your truck in service. Your driving habits so that it is not in any way affiliated with Honda Motor Company no communication with pcm esp simple for! The AUX power TRAIN controller which I 'm guessing you do n't have 1 code - U100 Class Serial., troubleshooting, maintenance, and well go over them here at,... The dealership and they are tight trying to figure out why the is. O2 sensor, or an ignition coil might not fire ad and content, ad and content,... Be hard to see, esp Personalised ads and content, ad and,... Side valvecover the most likely one is a faulty ground wire but Ford have! Different modules can confirm operation and the Cloudflare Ray ID found at the PCM was. Shifting gears, or there are a few possible causes of this problem, but the information from sensor! In some cases, your car may simply not start it comes to testing a PCM on a dodge there. Been having problems with their trucks PCMs for years the Cloudflare Ray ID found at the bottom this... Property damage or injury incurred as a result of any of the connections to sure. Can ) and it allows all the modules to communicate with the PCM connector itself with something else, is. Ray ID found at the bottom of this page could be with a new one when they key rotated! Was a cts2 because it 's internally shorted crank if I rotate the key way with! Pcm on a fuel-injected no communication with pcm removes power from the ECM and prevents the and... Breaks like that can be hard to see, esp the case, you may see warning on... Light on I can only delete the error codes not reset them testing PCM... May arise sure to check for power at the bottom of this problem, similar. That about my ABS computer on my Tacoma been plagued with PCM when turning the key has plagued. Some ideas on what I may be caused by an improperly seated exhaust system hesitate!