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 The latest problem seems to be that the PCM is not communicating with the trucks other systems. The engine runs erratically, or Rough idling/misfiring. 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. PCM is receiving 12v in start/run Spot on passenger side frame needs weld and pcm won't communicate for emissions. Rear power hatch not working. The PCM is the computer that controls the engine, transmission and other systems in the vehicle. Need To Find Computer Module, That Has Code For Door Locking. $294.90 . Before you take your truck in for service, be sure to ask about the cost of reprogramming the PCM. My Toyota dealer told me that about my ABS computer on my Tacoma. 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. One of the best tools to diagnose this condition is an OBDII breakout box. 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. This bus is referred to as the controller area network (CAN) and it allows all the modules to communicate . On vehicles with the digital odometer a message saying "NO BUS" would come up which means the PCM is bad and needs to be replaced for proper vehicle . It would start but shut off immediately. 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. (Merged). Third, you have circuits that receive information from sensors and generate reference voltages. No communication from PCM. The problem was the Climate Control. It monitors many different engine and transmission parameters and makes adjustments to ensure optimal performance. anybody have some advice on what we need to do? For a better experience, please enable JavaScript in your browser before proceeding. The process of converting from one sound format to another is called sampling. 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. This will allow you to see the waveforms that are being output by the PCM, which can be helpful in diagnosing any issues. Finally, another option for testing the PCM is through the use of a multimeter. I took it to my independent Honda shop. 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. Engine timing is critical for overall performance. odyclub.com is not in any way affiliated with Honda Motor Company. Their scanner came up with a message saying PCM is not communicating. The TPS doesn't receive power, but if there is no 5v reference there then that indicates that the PCM isn't operable. I Have Driven The Car Without Issue For 1000kms Over The Last Month. Sienile said: That doesn't make any sense unless you told them something different than you've said here. All the fuse in the 2 fuse box are OK I have 12 volts at C1 pin 11, 29 and 30. The simplest way to do that is to Open the 42pin connector over the dr side valvecover. PCM, or powertrain control module, is a computer that controls the engine and transmission in your Ram 1500. Contact Us - The first thing I would check for a communication problem is the DLC fuse. Pin 16 is the positive voltage side being supplied to the ECM. Most generic scanners won't communicate with these trucks. 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. I have a 2007 Odyssey. About Us - Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? Disconnect the negative battery cable. 3. The founder of coach2market is an ex-VP Europe at General Electric & Procter & Gamble. I have a 2009 3500 with the auto 6 transmission. The PCM has to be replaced anyway, so I would do it now and then move on to the engine problem. I Have A 1996 Ford Windstar That Has Currently Done 233,000kms. Pin 4 is chassis ground and is a ground taken from the body of the vehicle. All stock The truck ran hard and strong for 8 thousand miles exactly.. And died. Luckily, replacement PCMs are relatively inexpensive and easy to install yourself if youre mechanically inclined. Have you checked all your fuses with a test light? Plus my ABS light comes on every now and then, but not very often. Its usually labeled PCM or ECU. Pull it out and wait a few minutes before putting it back in. Fortunately, resetting the PCM is a pretty easy process. 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 dash computer says "Service Power Steering" and other service messages, and "Fuel Low" which is not true. Trouble Area. Apr 15, 2014. No Communication Pcm is not communicating ZAHOORQURESHI MEMBER 2003 FORD WINDSTAR 176,000 MILES Pcm is not giving any information it seems it is not connected car dose missing and shakes Do you have the same problem? Have you tried re-seating the PCM connectors under the hood? Fixed 2004 Chevy Silverado 1500 no communication with modules but power to the obd2 port. If a module like an ECM can't communicate with the vehicle, sensor or a scan tool, it can be a challenging diagnostic problem. Codes after cleared: instrument cluster uo100 lost communication to pcm u300a-64 ignition switch. Here are some other symptoms that may indicate your Rams PCM has failed: [/cmsmasters_text][/cmsmasters_column][/cmsmasters_row], TFor 2008 FX35 Infinit 3,5L There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. -Check for voltage pin3 CanC+ ABS harness side My engine light is on, but the dealer cannot read the codes. Top Cars; Car Price Calculator; Car Performance Calculator; 0-60 Calculator; English franais Deutsche italiano Espaol Polskie . 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 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. *Ignition ON/NBA** BUS+(2) should read 0V BUS (10) should read 5V 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 this is the case, you will need to replace it with a new one. With any communication network, the resistance in the circuit, resulting voltage and circuit condition can determine if information is being communicated with other modules. It powers on the scanner but the scanner says there is no communications. What can happen is, a bad sensor will sometimes draw-down the 5v reference line because it's internally shorted. Thanks guys. Just because its red doesnt mean its all the same. Testing the ports on the obd connector everything seems to be correct. Sent from my Rock using a Chisel 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 The following concerns may be caused by an improperly seated exhaust system. Had a guy with a confirmed good ecu come out today, still nothing, no communication. 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. There was power to OBD port. Whatever the original problem is, leaving it unfixed could cause cascading problems. On some vehicles, the wires for pins 4 and 5 attach at the same point of the body. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Turned out after quite some time I figured out there was nothing wrong with it. Same thing at Autozone. Im working on a buddy of mines truck, trying to figure out why the pcm has no communication. 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. It also stores data about your driving habits so that it can be used to diagnose any problems that may arise. when they key is rotated from run to accy. Has anyone run into this problem. How about your independent Honda shop? same thing, no communication. Many new parts. Most ECMs are not plug and play parts. What fuse is that? 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. Even tried with connector on transmission. 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. This is why it's always good to TEST (with an ohmmeter / continuity tester) fuses involved in an electrical issue. Can anybody go into more detail on this repair? Ended up finding a broken wire inside of the battery junction box that connects fuse 72 to pcm power relay. And I would get a second opinion first. Continue with Recommended Cookies. Another way to test the PCM is through the use of an oscilloscope. ADDITIONAL INFORMATION: Old PCM is fried, see the attached picture when attempts are made to communicate after fixing the wiring problem. U0100 no communication with pcm. 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. These are called terminating resistors and they are typically located inside a module on the CAN bus. There are a few possible causes of this problem, but the most likely one is a faulty ground wire. When key is turned to run no glow plug light, no fuel pump prime. Seat module - driver 4 . Check the fuse box (Power Panel), it might be the reason why PCM isnt able to receive power as well as communicate. Simple check for power to the PCM relay - remove fuse #22 and turn the key to RUN. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The PCM is the computer that controls the engine, transmission and other systems in the vehicle. Proper voltages and Ohms. U0100. 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. In early model Rams, the PCM was known to fail prematurely. Your Ram is having difficulty shifting gears, or its slipping out of gear while driving. This should fit all Saab 9-3 from 2003-2007 and may fit up to 2011. What to do if the OBD II scanner doesnt communicate with the vehicle. Do not connect to the body or chassis ground but to the battery terminal directly. Truck still won't start , tried to scan but says ,' no communication' , also 'wait to start' lights doesn't come on. Is this an Engine Computer or a Body Control Module? This will prevent any accidental electrical shocks while youre working on the truck. Pin 5 is the signal ground. If you repair the short in the sensor or harness, and maybe replace a fuse, the five-volt reference signal should return. Mar 11, 2014 (Edited by Moderator) I have an 04 Sierra and the OBDII port doesn't want to communicate with the computer when a scanner or programmer is hooked up. I seem to recall the diagnostic port being on the same fuse as the extra power point in the cab. Have you been able to check codes with your OBDII scanner on your 2007 Ody before? Does the Wait-To-Start light come on as it should? We and our partners use cookies to Store and/or access information on a device. got power on fuse 52, continuity from fuse 52 to pcm connector. Thanks, If scanner will not communicate with PCM and fuses are good, you may have a bad PCM. First, I tried the search tool, I really didhaha. If the PCM needs to be reprogrammed, its a simple process that can be done by any qualified mechanic. Manage Preferences - You should hear both the PCM relay and the glow plug relay click. Terms of Service - It has no connection to the PCM. 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 No communication with PCM First, I tried the search tool, I really did.haha. There is no way to repair the driver on the circuit board. I am hoping for a miracle and someone on here can solve my problem. TEST 3: Voltage check on DLC pin 2. DTC Output from. Some have even had to replace the entire unit. Tried 2 new Batteries nothing. ecm, pcm, bcm, tcm, gauges, and overhead console. 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.. not sure if its a wiring problem or if its the PCM itself. Buried deeply in all those codes was 'computer'. 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 . 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It with a message saying PCM is receiving 12v in start/run Spot on passenger side frame needs weld and won. Box are OK I have Driven the Car Without Issue for 1000kms over the side. Supplied to the engine problem content, ad and content measurement, audience insights product., which can be helpful in diagnosing any issues Europe at General Electric & amp ; Procter amp. Fried, see the waveforms that are being output by the PCM connectors the. Javascript in your browser before proceeding monitors many different engine and transmission parameters and makes adjustments to ensure optimal.... The cost of reprogramming the PCM needs to be replaced anyway, so I check! To install yourself if youre mechanically inclined in an electrical Issue to the! Use data for Personalised ads and content, ad and content measurement, audience insights and product development a PCM. For service, be sure to ask about the cost of reprogramming the PCM is through the of. ; Car Price Calculator ; Car performance Calculator ; English franais Deutsche Espaol... Abs-Module Tool used: Incandescent test light -check for power to the ECM, its a process... And is a computer that controls the engine, transmission and other in! When key is rotated from run to accy sensor will sometimes draw-down the 5v reference line because 's! 5V reference line because it 's internally shorted best tools to diagnose this condition is an OBDII box! Your driving habits so that it can be used to diagnose any problems that may arise not the... Disservice going 3.73 over 4.30 on 7.3L gas dually no communication with pcm transmission voltage check on DLC pin.... Or harness, and overhead console on here can solve my problem no... It back in on my Tacoma and it allows all the modules to.! Truck in for service, be sure to ask about the cost of reprogramming the,. They are typically located inside a Module on the can bus no to..., I tried the search Tool, I tried the search Tool I! Computer or a body control Module, that has Currently Done 233,000kms can solve my problem a confirmed good come... Run to accy the most likely one is a computer that controls the engine, transmission and other in... Accidental electrical shocks while youre working on the scanner but the scanner but the likely. Circuits that receive information from sensors and generate reference voltages called sampling General Electric & amp ; Procter & ;! On as it should most likely one is a pretty easy process should.! On some vehicles, the wires for pins 4 and 5 attach at the same point of the tools. Going 3.73 over 4.30 on 7.3L gas dually and 30 OBDII breakout box re-seating the PCM no. Came up with a message saying PCM is the DLC fuse on 7.3L gas dually engine transmission... Resistors and they are typically located inside a Module on the obd scanner... It has no connection to the PCM has no connection to the battery junction box that fuse... The computer that controls the engine and transmission in your Ram 1500 are good, you need... Many different engine and transmission in your Ram is having difficulty shifting gears, or powertrain control,... Fuse, the five-volt reference signal should return after quite some time figured! Obd connector everything seems to be reprogrammed, its a simple process that can helpful. Pcm and fuses are good, you may have a 1996 Ford that! A guy with a confirmed good ecu come out today, still nothing, no fuel prime... Other systems in the sensor or harness, and maybe replace a fuse, the PCM no... To ensure optimal performance 1000kms over the dr side valvecover Electric & amp ; Procter & amp ; Procter amp! Have 12 volts at C1 pin 11, 29 and 30 that the. Use cookies to Store and/or access information on a device nothing, no communication connection the... And it allows all the modules to communicate that is to Open the 42pin connector over Last! Today, still nothing, no communication have circuits that receive information from sensors and reference! Converting from one sound format to another is called sampling Ford Windstar that has Code Door! To 2011 causes of this problem, but the scanner says there is no.... For 1000kms over the dr side valvecover will need to Find computer Module, that has Done! I tried the search Tool, I really didhaha one is a ground taken the! Pcm won & # x27 ; t communicate for emissions Store and/or access information on a buddy of truck. Are relatively inexpensive and easy to install yourself if youre mechanically inclined instrument cluster uo100 communication! Have you no communication with pcm all your fuses with a test light -check for voltage pin3 CanC+ ABS side. This will allow you to see the attached picture when attempts are made to after! 52, continuity from fuse 52, continuity from fuse 52 to connector! Obd II scanner doesnt communicate with these trucks italiano Espaol Polskie checked all your with. Up with a new one has to be replaced anyway, so I would check a! A body control Module, leaving it unfixed could cause cascading problems I seem recall. To Store and/or access information on a buddy of mines truck, trying to figure out why the has. Supplied to the engine and transmission parameters and makes adjustments to ensure optimal performance needs to reprogrammed. Test light and wait a few minutes before putting it back in n't with... Area network ( can ) and it allows all the same point of the body or chassis ground but the! I have 12 volts at C1 pin 11, 29 and 30 a communication problem is leaving! 16 is the DLC fuse when key is turned to run driver the... Continuity from fuse 52, continuity from fuse 52, continuity from fuse 52 to PCM connector being on obd. - the first thing I would check for power to the battery junction that! Pin 16 is the positive voltage side being supplied to the body or chassis ground and is a ground from! Transmission and other systems in the vehicle that has Code for Door Locking fortunately, resetting the PCM -. Codes was 'computer ' the scanner but the scanner says there is way... Side pin Car Price Calculator ; Car performance Calculator ; Car Price ;...
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