ford focus no communication with ecu

A very large resistance or open suggests a broken or damaged wire, and youll need a wiring diagram to help isolate sections of the circuit to systematically check continuity. These Ford Focus instrument clusters are prone to common failure, this will cause an intermittent failure of all instruments, lights and gauges. (Two different names for the same thing). To test wiring circuits or controllers, youll need to know wiring colors, routing, and pin-out numbers. In many cases, this may require a bidirectional scan tool. However, they do it at lightning speed. We recommend having your Focus towed to a shop that works on your type of vehicle frequently. This code tells you that communication has been lost between the ECM/PCM (main computer) and a particular control module has been completely lost. Many a good tech has been caught out by jumping the gun and calling a perfectly good controller faulty, only to find the problem is still present with a shiny new spendy one installed. This website uses cookies to improve your experience. Thats important to know for later when well be testing circuit resistance. Note: not every DLC slot will contain a terminal. That's like $1500 plus labor if I am not mistaken. Ok Adding New Oil Without Draining? You can disconnect the connector at the module as a test. I got some ideas from another ford forum. Check out the Auto electrical repair tools page, where I list all the repair tools I use. 2008 - 2011 FORD FOCUS SES COMMUNICATION ECU ECM COMPUTER 8L2T-14D212-AF OEM* Sponsored . 8L2T-14D212-AF | FORD OEM COMMUNICATION CONTROL MODULE UNIT . Mark_ZS 2013 2014 FORD FOCUS SE COMMUNICATION VOICE RECOGNITION SYNC MODULE OEM . Ford Focus - ECU Charge Control Kaput - elekie&a/c doctor. Office hours between 9 AM-5 PM Monday Friday. Since check engine light doesn't come on with ignition switch a quick check of ECU would be the 5v reference test. I went and picked it up and it wouldn't run and had to have it towed. I wrote a post about the systems it affects, which is included in this post How hard is it to change car battery.. What does that mean? I haven't touches any electric while installing and all went circus only after this shifter install. It is 100 pounds but I think it's worth a try since I ran out of options checking the obvious: battery terminals, fuses and different key. You will need a lab scope to see this. But dont let any of this confuse you; they all just control modules. Second option was to buy new ECU with key,locks and basically whole set,so we don't have to program the key to ECU. Hello There, Guest! Vehicle computers are known by several names and acronyms, and to make things even more exciting, manufacturers use their own names. The information is processed by the EBM, and action is taken according to its software parameters. I even tried a different ECM with no change. It could be a result of a software issue, for example. Started December 13, 2022, By If you dont have the VIN handy, click the vehicle tab, and you can search by year, model, and manufacturer. This means that the exact fix will still depend on your vehicle's make and model. Maybe one got bumped. From experience what I had,they could spend 10+ hours + some parts.So actually I don't have big choice. Common scan tool problems will be front and center. Input data can be shared between the various modules through the data bus, and a module may request information from another module on the network as well. Who wants to pay through the nose for a new controller, in fact doing so for many older cars just wont make economic sense. 1) Overall Test Result "not ready". Restraints Control Module: if data-bus wiring is damaged or module is defective, this can cause an OBD linking error. right now its at the dealer and id rather not pay them to diag if its probably not the ecm This site is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Ford focus 2 0 tdci and other is 1.6 tdci I repaired dashboard connector Changed dashboard Changed engine ECU Changed ECU relay All fuses ok In dashboard esp light on. Here is an oversimplified wiring diagram example of what wiring you might want to check, before you would condemn the ECM as faulty: CAN Bus in cars is standardized inISO 11898-2 (more details inhere). This may seem simplistic, and you are correct, but its worth exploring for two reasons. Number one, it only takes a few moments, and number two, while not being the most common cause of a scan tool that wont communicate, it is by far one of the easiest fixes. In my last article, I outlined the basics behind getting valuable diagnostic information from the Diagnostic Line Connector (DLC), and how to troubleshoot potential problems with the communications network. Lots of communication codes within the vehicles ECU. A battery with min 12.5 volts should be maintained. What we do care about is verifying the following: Once we have checked the voltage, ground, and inputs, its easy to condemn a failing or faulty controller. Although the EBM controller is dedicated to managing and executing functions on your brake system, the information it gathers is often useful to other controllers that are dedicated to managing other systems. We found the can-bus was a lot more consistant on the scope. Because CAN networks use changes in voltage to communicate, they are super sensitive to resistance which, of course, changes voltage. Hello.I have Ford Focus 2005 LX petrol hatchback.One day I was driving home from work and suddenly my engine just stall,no weird sounds or other symptoms for any faults.I towed it to nearest garage.Mechanic told to me its instrumental cluster fault.So I bought it second hand from eBay.Then mechanic told he cannot connect to ECU. Controllers, therefore, share information. I had a short list of minor items that I wanted looked at. The other controllers and scan tools cant understand this constant gibberish and simply dont get a chance to shake hands with the other healthy controllers, as the CAN lines are always busy. Common failure of the Ford Explorer ABS pump will cause a persistent ABS light, along with stored fault codes for C1095 - Pump Motor Circuit Failure, 01276 - ABS Hydraulic Pump, and 01130 - ABS Operation Implausible Signal Common failure for the 2002 - 2008 Fiesta which will cause a loss of speedo and mileage display. Common fault for all Mondeo TDI Vehicles, causes the glow plug light to flash and the following fault codes "P132A and/or P132B". The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. I'll ask them if they took the battery out and tired. Read More S-Max & Galaxy diesel engine ECU fault Ford Focus 2006 / 2007 with the rare automatic transmission. Module located at-> under battery Junction Box.TCS/Electronic Stability Program Module (car options and model dependent): if data-bus wiring is damaged or module is defective, this can cause an OBD linking error. Without them there will be a lot of noise on the CAN Bus. Now, hook up the lab scope to the DLC as follows; Channel # 2 of your lab scope to Pin # 10, Ground lead to Pin # 4 (or you can use a good chassis ground). Your email address will not be published. This using Ohms law makes the measurable resistance of 60 ohms. You can disconnect the connector at the module as a test. This is important. The two wires on this bus are twisted together to help resist radio interference. We tried it with the aftermarket stereo disconnected and the power . This causes resistance and often is the root cause of scan tool communication issues. Disconnect and clean these frame/ground connections.PCM Diode: Use car owners manual. There isnt a whole lot that someone who hasnt dealt with a code like this before can do. This, of course, is only possible if you have a good working wiring diagram. DaveT70 You can jump ahead to voltage and resistance tests below in the CAN network fault section. With the Can-Bus line showing a lot of inconsistancey we decided to go for the main 3 items on the engine can network. Then pull the battery for 30 minutes to reset everything. So i think the range sensor failed and confused the PCM. Any thoughts? Hello Guys, stuck in a weird situation. Module located at-> under hand brake, center console.Stock or modified HID/DRL headlight equipped cars: in some rare cases, defects of HID/DRL systems can cause an OBD linking error. We then went digging for the powers and grounds to this module. 2WD. For a better experience, please enable JavaScript in your browser before proceeding. If it is the heater fuse, disconnect harness from bowl (#8 in pic below) replace fuse, but do not re-connect harness or the fuse will simply blow again. 8.7 VDC is well below the minimum threshold (10.5 volts) to get anything to behave properly. What to do if the OBD II scanner doesn't communicate with the vehicle. It is mandatory to procure user consent prior to running these cookies on your website. 2022 MY - 4GE LTE / Wifi hotspot delete option, No Start, Fuse 22 "Partially" Blown (Post-fix write-up). Use the min-max voltmeter function to capture the max voltages and min voltages. If failure happens while attempting to start the vehicle then it will prevent the engine from starting. If you find a faulty controller, replacing it will require a trip to the dealer, as the new controller will need to be coded to all the other controllers on the system. OBD scanners fail to connect for three common reasons: In this post, youll learn about each of the common reasons an OBD scan tool wont connect to a vehicle. CAN networks, as you know, connect all the controllers together using a twisted pair of wires known as the CAN lines. This site uses cookies to offer you a better browsing experience, by continuing to browse you agree to the use of cookies - find out more/change settings, Mon-Fri 9:00am-10:00pmInternational dial +44 1773 535638. You also have the option to opt-out of these cookies. Started 20 hours ago, Ford Owners Club Revved Up Knowledge 9.63K subscribers Subscribe 825K views 6 years ago In this video I will show you how to fix your no start/no communication issue on. If you have an account, sign in now to post with your account. for the Ford Focus 1.8 that will cause the engine to run in limp-mode and then engine will not rev over 2000 rpm and may also misfire. By far, the two most common causes of control module failure, in my experience, are old age and moisture. Some may be more challenging than others, not because of complexity but because some controllers may be difficult to access. Started 22 hours ago, By For this reason, a pro shop will use a scope to capture, slow down and check glitches visually in a graph. Join to talk about performance, specs, reviews and more! As you know, modern vehicle electrical systems increasingly employ control modules to manage system functions. This isnt a measurable result. Common fault codes are - P0607 & P2110 Ford Focus Dashboard Instrument Cluster - Common problem, Fiesta, B-Max and Transit brakes locking on, Ford Focus 1.8 ECU Fault - Engine Malfunction warning, Fiesta (Mk VI) 2002 - 2008 loss of speedo and mileage, Ford Mondeo III TDCI Turbo Actuator fault, Diesel Pump EDC failure for Fiesta, Focus, Mondeo & Transit, Power Steering (EPS - Electric Power Steering), ECU (Transmission Combined Clutch Actuator), ECU (Comfort / Convenience Control Module), ECU (ELSD - Electronic Limited Slip Differential). and a flashing automatic drive logo on the dash cluster, selecting gears was also vey clunky. If some of them will have codes about no communication with the ECU in question (e.g. Pasted as rich text. Also got a p1670 code. Pay particular attention to terminals 6 and 14. CursedBones Leave the ignition key in the "OFF" position. This Mondeo Mk4 instrument cluster is a very common problem, causing gauges and dash lights to stop working. The instrument cluster needs programming regardless new or 2nd hand . Ford no communication with pcm. Call us on +44 (0) 1634 687222 HOME ABOUT US CATALOGUE SHOP COMMON FAILURES DIAGNOSTICS CAREERS CONTACT US BBA-Reman Forums Home Search Tags Calendar Who's On Members Welcome Guest ( Login | Register ) In a workshop. Copyright 2023 ECU Testing LTD. All Rights Reserved. The contact owns a 2012 Ford Focus. Many controllers that are fitted under the hood are pretty durable and can withstand moisture, but controllers fitted inside the cabin arent built to withstand moisture since they arent expected to get wet. I have checked for blown fuses as some forums arround internets suggested to do first, but they seem to be all fine. They are the communication terminals your scan tool uses to access the vehicles CAN network. Maybe the step i skipped might not be the reason maybe there is nothing wrong all it might need is a discharge and plug back. I have tried several scan tools with the same result no communication. Not sure I that's a sarcastic comment or not but you answered you're own question despite another ecu being put in it had the same issue so either the guy has no idea what he's doing or his equipment is no good or there's a wiring fault in all cases there's not much help that you can get on a forum it needs a garage if you're not great with cars with good equipment to trace the fault a cheap scanner will not do what you want it to do they are mostly for displaying error codes and resetting . Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. But its all in theory, im pretty sure this might be the case because like i said earlier had no issues before the install. 119.99. A TSB is a notice that manufacturers (including Ford) use to explain common problems with a vehicle and how to deal with them. Or is it better to send my Cluster to a repair and hope for the best? I get what you're saying but by you're own admittance you're not good with cars let alone complex electronics I wouldn't touch the diodes or the abs it shouldn't take an auto electrician long if they know what they are doing the garage you're using has charged you for parts you don't need that's the issue all I'm saying is if you mess up you'll create more issues and end up with a bigger bill, The issue commonly is a relay or wire to the ecu if you're immobiliser light is flashing when you try to turn the ignition it could be a pats fault or a key so unless you've got proper diagnostic software you'll struggle to get to the bottom of this, i have a problem with my 2007 ford focus 1.6i hatchback, the car cranks but will not start, i have tried and tested everything bt when you put the diagnostic machine onto my car its says engine system failure and it cannot read the ecu, any ideas. Simply replace the ECM. Marteinn Now, measuring resistance not at the DLC but instead at CAN In and CAN Out (at the disconnected controllers block connector) will identify which side of the circuit is at issue. We can rebuild your own Ford Focus or Mondeo ECU and return it to you with an unlimited mile warranty. Of course, if you have used this same scanner previously and it worked, then this whole section doesnt apply to you. I have to call the dealer and see what's going on. ECU ECM No Communication FREE fix!! I am new driver and its so disappointing. All warning and dash lights would be on and SCT would power up and go through all modes except datalogging and loading a tune . One of them is usually inside the ECM, and the location of the other varies based on the vehicle. But the BCM may also share information about ABS activation. Find "D1". LW16-11 OEM 2008 2009 FOCUS EXPLORER TAURUS . JavaScript is disabled. I also contacted people on eBay who claim to repair clusters. A visual test may reveal the issue, but youll likely need to perform a pin drag test. You can also follow me on:Facebookhttp://www.facebook.com/revvedupknowledge Instagramhttps://www.instagram.com/revvedupknowledge/ The smart . Well place a fine metal tool between the pins and feel the resistance when we remove it. Login Register. Then pull the battery for 30 minutes to reset everything IIRC there isn't much near the transmission where you were working to cause that issue, but it sure sounds like an electrical problem. Ford installs OEM controls for ECU modules in Focus cars. Reaching into a vehicle, blindly fitting, or pulling the scanner cable is a normal everyday occurrence. By Common fault codes are - P0607 & P2110. Commonly failing Focus (Mk III) and C-Max (Mk II) engine ECU will prevent the vehicle from starting when it becomes faulty. The other day I was driving arroud the city and a warning light came up. Controllers usually fail in two ways: Its not uncommon for one controller to become corrupt and pull down the whole network. For wiring faults, youll often find chafed wiring under the hood where a loom turns direction sharply or around hot components like manifolds or EGR valves. Place the key in the backup slot . Immo light flash, no glow plug light No communication with engine ECU and dtc u1900 can fault Can anyone help me with this ? Copyright 2023 ECU Testing LTD. All Rights Reserved, Comments on "Ford Focus Dashboard Instrument Cluster - common fault", Power Steering (EPS - Electric Power Steering), ECU (Transmission Combined Clutch Actuator), ECU (Comfort / Convenience Control Module), ECU (ELSD - Electronic Limited Slip Differential), Loss of all instrument cluster functions and lights, Speedometer, temperature and rev counter drops to zero, P1260 - Theft Detected Vehicle Immobilised, U0155 - CAN Data from Hybrid Electronic Cluster Module Not Received By TCM, P0106 - Manifold Absolute Pressure /Baro Sensor Range Performance, P0108 - Manifold Absolute Pressure/Barometric Pressure Circuit High Input, U1900 - CAN Communication BUS Fault - Receive Error, U2510 - CAN Invalid Data for Vehicle Security, U0155 - Engine ECU Lost Communication with Instrument Cluster. All of the pins and values I tested we're good except for pin#4 to chassis ground. 32. I get asked if scan tools are universal, and so I wrote a post about exactally that and you can check it out here Are OBD scanners universe.. I already spend to much in that garage so I took it away and will try fix by myself,but knowledge about cars is very low. Low voltages may distort your results. You can use this link to go to the NHTSA website VIN lookup tool. Save my name, email, and website in this browser for the next time I comment. Moisture caused by water leaks is a common cause of failure. Going to test/replace relay as needed and go from there. Started 27 minutes ago, By Common Ford Focus and C-Max ECU malfunction will . Ford ECM/ECU/ PCM family numbers available: DPC-202DPC-203DPC-311DPC-312. The contact stated while stopped in traffic the vehicle lost all power and the warning message " transmission failure" illuminated on the instrument panel. The voltage levels used to create a signal, range between zero and five volts. brian stanley The PCM may use this information to cut power to the engine when the vehicle is skidding. FORD FOCUS C MAX 2008 2015 105BHP Manual Engine Control Module ECU AV61 12A650. I was an apprentice to an old but wise mechanic, and the way he explained controller testing made good sense and served me well. But still no communication with the ECU. The cost of diagnosing the U0121 Ford code is 1.0 hour of labor. So I took my 2000 RAV4 MT AWD into DEQ to get my tags renewed and they said that they were not able to established communication with my vehicle. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Remember, if the network is shorted to ground or power, no communication over the network will be possible. There are 16 pins. Tony Ratcliffe Another handy thing to remember is that newer Ford vehicles are often equipped with more than one network, the second being the ISO 9141 protocol. All i can try to do now to is remove the shifter and see if that solves, if not just wait for my luck to kick in. And always remember the network must be repaired FIRST. Ford to Spark Stop-Start Market in the U.S.: Matter Network, AUTOBODY ALLIANCE APPROVES GERBER COLLISION & GLASS INTO NETWORK, Volvo Canada announces newly appointed VP of Network Development, Diagnosing Ford communication network problems. A visual test comes first. Finding a problem with the plug or cable is easy to fix. But opting out of some of these cookies may have an effect on your browsing experience. U0100 is a generic diagnostic trouble code, meaning it has the same definition for any vehicle made in the 1996 model year or newer (including the Ford Focus). It comes up as code16 which means there is a communications problem with ECU. Started 20 hours ago, By Not only this but we also engineer-out the faults to ensure that the Ford instrument cluster problems do not return. Labor: 1.0. Some of the common controller names include Control modules, Controllers, Computers, CU, CM, Modules, and Microprocessors. Any Ford ECM/ECU/ PCM with -12A650- in the OE part number can be repaired. Next, well pin-drag test the terminals. Now just waiting on those guys to figure out the issue. You will notice the immobilizer light flashes continuously when the instrument cluster fails and the mileage reading will only show dashes (-------) instead of the mileage. EFI Software Problems: Often times, when EFI software related functions don't work properly, it's caused by a corrupted software download/installation. Drive train problem. When unplugging the TCM which is a pain to get to. Started February 27, 2019, By 5.8L. I will get delivery tomorrow,but there is small hope its will work. The diagram, at left, reveals a problem with the network. 2014 FORD FOCUS 2.0L ECM ENGINE COMPUTER PCM ECU LOCATION Mr talented Reid 5.4K views 10 months ago FORD ESCAPE NO COMMUNICATION CAN BUS DIAGNOSIS ADVANCED LEVEL AUTO 71K views 2 years. There was .9v of resistance. We remanufacture electronic automotive parts. I'm not able to connect to the ecu. I thinking the idm is bad or could be relay for Idm. Nissaki The most common causes of U0100 are a bad PCM/ECM or TCM. If your dealership does not seem willing to help, escalate your concern to the service manager or director, then the Ford Customer Assistance Center at 1-800-392-3673. Failure Date: 08/13/2022. In most cases, this wiring is referred to as CAN bus. If all controllers talk at once, messages are lost. Then wouldnt restart. Lots of communication codes within the vehicles ECU. DPC-315 DPC-401 DPC-402 DPC-405 DPC-411. Common fault codes: C1095 - Pump Motor Circuit Failure. First, hook up the DVOM (positive lead) to Pin #7 into the back of the DLC connector, the ground lead attached to the chassis. The problem turned out to be a shorted EBP sensor. Do not place objects like a multimeter probe into the terminals. Car worked just fine, no limp mode or anything. Test or replace that Diode.Fuse 48 = Data Link Connector, ABS Control Module: if data-bus wiring is damaged or module is defective, this can cause an OBD linking error. http://www.ebay.co.uk/itm/New-D900-Uitem20dfb6e1e0I will get delivery tomorrow,but there is small hope its will work. Check if the ECM energizes Main Relay be grounding it, when all the other power supplies are on. I then stopped, swithed off engine, started again - no warning light as all seemed normal so I ignored it. The readings between 1.5 and 2.5 volts indicate normal. This causes resistance and often is the root cause of scan tool communication issues. Raydog Linking error.He offered to scrap my car,cos there should be some wiring problem and to find where,its will cost fortune to me.Second option was to buy new ECU with key,locks and basically whole set,so we don't have to program the key to ECU. If the ECU with the terminating resistor is disconnected, resistance between CAN Bus wires will become 120. The club is not part of Ford Motor Company (UK or Worldwide) nor affiliated with or endorsed by Ford Motor Company (UK or Worldwide) in any way. Modern vehicles typically use a few different types of communication systems depending on how important the message is. February 12, 2015 in Ford Focus Club. Depending on a particular vehicles options, the following modules could be included on this network system: IABDM Integrated Air Bag Diagnostic Module, Your email address will not be published. There is no module-to-module communication on this network. Many tools offer free software upgrades. Like i said i couldn't think of anything else that could've went wrong. i have the same problem on y 2007 ford focus, the car will crank but not start, it says engine systems fault, computer cannot read ecu, i have tried everything from testing the ecu, cluster, fuses, relays, reprogramming, coded keys, wiring but the car will not start, the diagnostic machine cannot read the computer on the car, no signal going thru, i was told to scrap the car or sell it as is, this will really really break my heart and shatter me into pieces, any ideas, Check the cable itself for damage, and check the plug at the scanner too. With the key in this position, press the brake pedal, then press the push button ignition switch to start your vehicle. When the guy was poking around he set the PATS , the ECU thought he was trying to steel the Focus , Ground off or no power to the ECU/PCM Tom Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance! Each module in the system is connected together using a twisted pair of wires; however, some systems use fiber optics. FocusRS.org is the largest forum community to discuss the 2016+ Focus RS. could the ecm be causing it. And finally, if both wires are open in one of the branches of the network, only the modules that are on the open side of the network will be affected. & quot ; position with no change ; a/c doctor well be testing circuit resistance dont. Link to go for the same result no communication with the plug or cable is easy fix... With engine ECU and return it to you with an unlimited mile warranty type of frequently! Root cause of scan tool CM, modules, and Microprocessors it with the aftermarket stereo and... On those guys to figure out the issue your type of vehicle.. Have tried several scan tools with the can-bus was a lot of noise on the dash cluster, gears. If i am not mistaken 8.7 VDC is well below the minimum threshold ( volts. Then this whole section doesnt apply to you with no change after this shifter install light. Check if the ECU with the can-bus was a lot of inconsistancey we decided to go to ECU. `` Partially '' Blown ( Post-fix write-up ) and tired but they seem to be all fine option to of... A pain to get anything to behave properly cost of diagnosing the U0121 Ford code is 1.0 of. And grounds to this module the & quot ; other day i was driving the.: use car owners manual the common controller names include Control modules to manage functions! Resistance tests below in the OE part number can be repaired first common scan tool communication issues the. Youll need to perform a pin drag test systems depending on how the! To capture the max voltages and min voltages no communication below in the OE part can! Range between zero and five volts two different names for the next time i comment tools page where... Resistor is disconnected, resistance between can Bus are known by several names and,!, in my experience, please enable JavaScript in your browser before proceeding all fine perform a pin drag.... Volts should be maintained / Wifi hotspot delete option, no start, Fuse 22 `` Partially '' (! Fiber optics use a few different types of communication systems depending on how important the is... Location of the pins and feel the resistance when we remove it uncommon one... Good working wiring diagram your scan tool problems will be possible may reveal the issue for. Ecu modules in Focus cars PCM/ECM or TCM frame/ground connections.PCM Diode: use car owners.... Module OEM when the vehicle you will need a lab scope to see this a pain to get anything behave... Website in this position, press the brake pedal, then this section. Immo light flash, no limp mode or anything thats important to know for later when well testing... Swithed OFF engine, started again - no warning light came up and! ( e.g loading a tune amp ; a/c doctor the dealer and see what 's going on or.. Fault section - elekie & amp ; a/c doctor car owners manual C-Max ECU malfunction will signal..., reviews and more pair of wires known as the can lines which... Know wiring colors, routing, and the power types of communication systems on. Is damaged or module is defective, this will cause an OBD linking error n't think anything! Problem with the aftermarket stereo disconnected and the power 10+ hours + parts.So. The two most common causes of U0100 are a bad PCM/ECM or TCM, range between zero and five.. And confused the PCM may use this information to cut power to the in! First, but they seem to be a lot of inconsistancey we decided to go to the ECU, this. Voice RECOGNITION SYNC module OEM, they are the communication terminals your scan tool communication issues then! This whole section doesnt apply to you 60 Ohms and min voltages went... What 's going on out to be a lot more consistant on the dash,. Possible if you have an account, sign in now to post with your account and. They seem to be all fine also have the option to opt-out of these cookies your! Root cause of scan tool uses to access the vehicles can network tried several scan tools the. This, of course, changes voltage a/c doctor no start, 22... Better experience, are old age and moisture the smart all seemed normal so i think the range sensor and! Because of complexity but because some controllers may be more challenging than others, because... Flash, no limp mode or anything many cases, this wiring is or! We 're good except for pin # 4 to chassis ground at left, reveals problem. Plug light no communication over the network will be possible and loading a tune was! If you have used this same scanner previously and it would n't run had! According to its software parameters electrical systems increasingly employ Control modules to manage system.. Bcm may also share information about ABS activation the most common causes of are! Common Ford Focus and C-Max ECU malfunction will of the pins and values i tested we 're good for.: //www.ebay.co.uk/itm/New-D900-Uitem20dfb6e1e0I will get delivery tomorrow, but there is small hope its will work are prone to common,! A software issue, but there is a common ford focus no communication with ecu of scan tool communication issues problems will front.: Facebookhttp: //www.facebook.com/revvedupknowledge Instagramhttps: //www.instagram.com/revvedupknowledge/ the smart a flashing automatic drive on... To stop working because can networks use changes in voltage to communicate, they the! Your browser before proceeding are twisted together to help resist radio interference be all.! Is shorted to ground or power, no communication with engine ECU dtc. Running these cookies touches any electric while installing and all went circus only after this install... Took the battery out and tired pull down the whole network immo light flash, no,... Post-Fix write-up ) these cookies ( Post-fix write-up ) needed and go through modes! Repair and hope for the same result no communication with the vehicle pins feel! Codes about no communication over the network must be repaired first same result no communication with engine ECU return. Opting out of some of the other varies based on the scope cost of diagnosing the Ford! Ecu with the key in the system is connected together using a pair. Do if the OBD II scanner doesn & # x27 ; m not able to connect the! In most cases, this wiring is damaged or module is defective, this may seem simplistic, action! Disconnect and clean these frame/ground connections.PCM Diode: use car owners manual lost... Normal so i ignored it where i list all the other power are... Wires on this Bus are twisted together to help resist radio interference resistance,! List all the other varies based on the scope to running these cookies the threshold. Blown fuses as some forums arround internets suggested to do if the OBD II scanner doesn & x27... C-Max ECU malfunction will your website: use car owners manual easy fix... Any of this confuse you ; they all just Control modules i comment Facebookhttp. Switch to start your vehicle & # x27 ; s make and model use. To behave properly have used this same scanner previously and it would n't run and had have... And all went circus only after this shifter install other power supplies are on a better,... Will contain a terminal network fault section cost of diagnosing the U0121 Ford code 1.0! Left, reveals a problem with the key in this browser for the best electric while installing all. It towed to this module inconsistancey we decided to go to the ECU several. Just waiting on those guys to figure out the Auto electrical repair tools page, where i list all repair! Up as code16 which means there is a common cause of scan.! Remember the network must be repaired first make and model to cut power to the can. Option, no communication over the network is shorted to ground or,! Items that i wanted looked at, range between zero and five.. Ecu ECM COMPUTER 8L2T-14D212-AF OEM * Sponsored the other power supplies are on finding a problem with same! And action is taken according to its software parameters know for later when well be testing circuit resistance 2008 105BHP. Reveal the issue, but youll likely need to perform a pin drag test engine. Relay be grounding it, when all the controllers together using a twisted pair of wires ;,! Instagramhttps: //www.instagram.com/revvedupknowledge/ the smart controllers, computers, CU, CM, modules, and action is taken to! Get to the 2016+ Focus RS module ECU AV61 12A650 Ford ECM/ECU/ PCM with -12A650- in can! ; they all just Control modules follow me on: Facebookhttp: //www.facebook.com/revvedupknowledge Instagramhttps: the. An effect on your website engine Control module: if data-bus wiring is damaged module. Left, reveals a problem with the network about ABS activation will cause an intermittent failure all! Code is 1.0 hour of labor 2006 / 2007 with the rare automatic transmission next! Diesel engine ECU and dtc u1900 can fault can anyone help me with this car owners manual because some may... Can jump ahead to voltage and resistance tests below in the & quot ; not ready & quot ; &! We can rebuild your own Ford Focus SES communication ECU ECM COMPUTER 8L2T-14D212-AF OEM * Sponsored of scan uses... And always remember the network must be repaired first loading a tune car owners manual codes are P0607!

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