Archive - Also other lights go on periodcally brakes check fuel cap and there is nothing wrong - please help? Most ECMs are not plug and play parts. Jan 5, 2013. Its usually labeled PCM or ECU. Pull it out and wait a few minutes before putting it back in. I took it to my independent Honda shop. Have you checked all your fuses with a test light? I had no pcm communication with scanner, no tach and no WTS light. Scanner can't establish connection with PCM on two different scanners. I had that problem with another ford, but similar pcm. How To Reset Your Jeep ECM (Engine Control Module), 2004 Jeep Liberty Problems To Keep In Mind, 2010 Ford Fusion Problems To Keep In Mind, The Coolest Home Decor For Auto Enthusiasts. Your IP: Same thing at Autozone. Pin 2 is the AUX POWER TRAIN controller which I'm guessing you don't have. Another way to test the PCM is through the use of an oscilloscope. Both confirmed all fuses were in working order and that power is running to the unit. Shutting off. You notice a decrease in fuel economy. I tried to check it with my OBDII Scanner. But, a lot of the damage to an ECM comes from the connected components. Luckily, replacement PCMs are relatively inexpensive and easy to install yourself if youre mechanically inclined. Apps Reset Also, if you are having communication issues, consider all things that are on the ccd bus circuit. when they key is rotated from run to accy. TEST 3: Voltage check on DLC pin 2. I tried communication with the ids and it says the pcm is blank and keeps prompting me to type in the vin number and I cannot get past that function. I had the same issue, dead pedal, and no communication with a snap on verus. Sienile said: That doesn't make any sense unless you told them something different than you've said here. Picture of the wire that was repaired. Codes after cleared: instrument cluster uo100 lost communication to pcm u300a-64 ignition switch. not sure if its a wiring problem or if its the PCM itself. An open ground or power (B+) circuit on a fuel-injected engine removes power from the ECM and prevents the engine from starting. Had a guy with a confirmed good ecu come out today, still nothing, no communication. I Was Driving My Van Yesterday, And It Was Running Fine, When All At Once The Message Center Displayed "fuel Computer Data Error." If anyone has any suggestions of what the culprit could be please let me know. Need To Find Computer Module, That Has Code For Door Locking. Pin 4 is chassis ground and is a ground taken from the body of the vehicle. For a better experience, please enable JavaScript in your browser before proceeding. I do have WMI installed, if i want to blame that wiring for this but then its fine for 6 months with that install. Usually the female side of the connector is forced out of the back of the connector on the vehicle. If youre having trouble with your 2003 Dodge Ram 1500s PCM, dont hesitate to get it checked out by a professional. Fourth, you have circuits that drive components like relays, ignition coils and fuel injectors. To check you can disconnect the electrical connection at the front of the valve body pan and try to communicate with the BCM. No communication with PCM If this is your first visit, be sure to check out the FAQ by clicking the link above. 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. Next, try resetting the PCM by disconnecting the battery for 30 seconds. At this point I'm lost and need your help. Most generic scanners won't communicate with these trucks. No Code, just that message. I'd check connections. Checked wiring and fuses even swapped PCM with a used one that was good. What to do if the OBD II scanner doesnt communicate with the vehicle. Their assessment is that the PCM has failed and that I need to have it checked out at the local dealership. With the ignition on, the voltage drop across the ground terminal should be 0.1 Volts or less. 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. No dvd player. No communication with the PCM usually = the PCM has no power. Truck still wont start , tried to scan but says , no communication , also wait to start lights doesnt come on. 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 Have Driven The Car Without Issue For 1000kms Over The Last Month. Full Description. No communication with PCM First, I tried the search tool, I really did.haha. help ecm not communicating. 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. 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. There is no way to repair the driver on the circuit board. They said they can replace it but they are not able to . It monitors many different engine and transmission parameters and makes adjustments to ensure optimal performance. One of the easiest tests to perform is to see if there is power and ground being supplied to the ECM. If this is the case, you may need to take your truck to a dealer or mechanic for diagnosis and repair. Looking for some input from someone. (Merged). 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. 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 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. Pigtail wiring included for your convivence. 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. First, check all of the connections to make sure they are secure. 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. But I might be confusing myself with something else, that isn't to tuff to do. Have you tried re-seating the PCM connectors under the hood? Apr 15, 2014. If you look at a wiring diagram for a CAN bus that uses a loop configuration, the modules at the beginning and end have 120 Ohm resistors. PCM is receiving 12v in start/run With the Ignition on, the voltage on class 2 serial data pin should be 5V or fluctuating between 3.5V and 5.0V, If open, PCM cannot transmit data to the scan tool. Check for an open circuit. It would start but shut off immediately. Please help, it's a 2008 5.4L 130k easy kilometers on it and it seems it will. The founder of coach2market is an ex-VP Europe at General Electric & Procter & Gamble. The first and most common way is to use a code reader or scanner. I've tried reseating all the connectors on pcm nothing happened also check the park brake area everything seems tight and in-tack. 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. 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. Note, it is possible to get some valuable information from a used un-programmed salvage yard unit. If that solves it, then the dealer was right. For a better experience, please enable JavaScript in your browser before proceeding. **No Bus Activity! If there is a problem with the PCM, the vehicle may not run properly or at all. 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. Dodge ram no communication with pcm dodge ram 1500 pcm reset 1998 Dodge Ram 1500 SLT | Cars & Trucks | St. Albert | Kijiji. If a module like an ECM cant communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. This can be easily fixed by checking all of the connections and making sure they are tight. Blaster Introduces the January 2023 IOTY Finalist, Christmas PopQuiz Seems More Coal Than Cool, This Weeks Winners Pass The Baton And The Test, Register to Attend the Summit Racing Livestream, How Extended Interval Oil Filters Have Been Improved, Understanding Engine Timing- Chains, Gears and Belts, Timing Chain Systems Need Clean, Quality Oil. Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more! Each time, I recieved a "Link Error" message. 2008 rouge, was running great turned it off, went to start it again 2 seconds later, crank but no start. odyclub.com is not in any way affiliated with Honda Motor Company. Has anyone ever had this problem? One possibility is that there is simply a loose connection between the PCM and the trucks wiring harness. You should hear both the PCM relay and the glow plug relay click. DTC Output from. If it reads 120 ohms, you know that a module is no longer present and the CAN bus and the network will be down. 94.5 and early 95 were not OBD compliant and needed a PCM flash upgrade to be so. Dec 22, 2022 (Edited) Hello, I have a 2007 Envoy Denali that I swapped a L92/6L80E/AWD transfer case from a 2008 Escalade. I took it to my independent Honda shop. 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. Despite sharing the same moniker called ATF (automatic transmission fluid), most OEMs use different proprietary blends (additives) for their transmissions these days, and it may be confusing some technicians as to which type of fluid is required for a vehicle. Testing the ports on the obd connector everything seems to be correct. Tailgate is rust free from the south. Please No Off Topic, Do Not Sell or Share My Personal Information. 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 With these types of errors, you can communicate with a module, but the information from a sensor is missing or implausible. If the power, ground, and all fuses have been confirmed, with no communication then a bad PCM needs to be considered. Is the AUX power TRAIN controller which I 'm guessing you do n't have side... To perform is to see if there is a problem with the PCM by disconnecting the for. Your help Error '' message test light Also check the park brake area everything seems tight and.. To do if the power, ground, and no communication then bad... If the OBD II scanner doesnt communicate with the ignition on, vehicle... But they are secure each time, I really did.haha tach and WTS. The unit from a used un-programmed salvage yard unit luckily, replacement PCMs relatively. Pin 2 is the case, you have circuits that drive components like relays, ignition coils and injectors! Has no power but says, no communication with the BCM, please enable JavaScript in your before... Join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance and. Happened Also check the park brake area everything seems tight and in-tack youre. Used un-programmed salvage yard unit lights doesnt come on 94.5 and early 95 were not compliant. 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The engine from starting culprit could be please let me know and there no... Replacement PCMs are relatively inexpensive and easy to install yourself if youre having trouble with your 2003 Dodge 1500s. Compliant and needed a PCM flash upgrade to be considered, try resetting the PCM, the vehicle with 2003!