It can be found in the console storage compartment, cup holder, or other location depending on your vehicle. nasan Thats not to say we disrespect kit or customers vehicles, but working on a workshop floor is all about speed. The contact stated while stopped in traffic the vehicle lost all power and the warning message " transmission failure" illuminated on the instrument panel. We recommend having your Focus towed to a shop that works on your type of vehicle frequently. I have now ECU and instrumental cluster connected,from other focus.They tried connect to original ECU and cluster and said they can't connect,linking error.So they change ecu,cluster and same,could't connect.When I tried today to connect-linking error.On the dashboard show - engine system fault.And when key is off ignition on dashboard I see mileage.When ignition is on all works fine - dashes,all electrics.I had to save money for long time to buy this car. Because CAN network language uses voltage drops to communicate, they are super sensitive to changes in voltage; in other words, they are super sensitive to circuit resistance. Next, well pin-drag test the terminals. Powered by Invision Community, DISCLAIMER: fordownersclub.com is an independent, unbiased Ford car forum / club for owners of Ford vehicles. If you buy one, drive it hard. Its very cheap and there is big possibility its doesn't just work. Free shipping . Some may be more challenging than others, not because of complexity but because some controllers may be difficult to access. Check if the ECM energizes Main Relay be grounding it, when all the other power supplies are on. No mods or chips. Necessary cookies are absolutely essential for the website to function properly. Think about it like your Focuss brain not being able to talk to its hands, legs, or another appendage. Linking error. A great place to start diagnosing U0100 is to see if there are any Technical Service Bulletins (TSBs) related to your Focuss the PCM. The CAN high uses a voltage range of 2.5 to 3.5 volts, and the second wire, known as CAN low, uses a 1.5 to 2.5 voltage range. The engine control unit is a separate module that is attached to most Duratec motors. Second, if circuit # 914 & # 915 are both shorted to ground, a complete network failure will result. We dont know whats going on inside them, and we dont really care. This using Ohms law makes the measurable resistance of 60 ohms. The scanner you are using may simply not be compatible with your vehicle. The cost to diagnose the U0155 FORD code is 1.0 hour of labor. Communication circuit wiring chafing and breaks are common but not as common as controller failure. They will quote for a new control plus software plus labor to fit, and were talking hundreds here, $800 upwards. Theyre not expensive. 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 ) I'll ask them if they took the battery out and tired. Required fields are marked *. Universal Car Truck 3 in 1 Interface Scanner Diagnostic Tool For V2013.03 CDP+ ". If you find terminals with little to no tension, use a suitable tool to gently close the legs so that they maintain greater tension. But opting out of some of these cookies may have an effect on your browsing experience. This code means that the Transmission Control Module (TCM) and other control modules on the vehicle are not talking to each other. A person who is faced with the task of changing out an ECU for a Ford Focus does not have to worry. 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. The most common causes of U0100 are a bad PCM/ECM or TCM. Wear and tear and front probing cause the terminal legs to lose tension. Ford installs OEM controls for ECU modules in Focus cars. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 5.8L. data lines ohm ok, all powers and grounds ok, hold relay diode ok. tried a used pcm as directed by flow chart for no response from pcm to scan tool, same problem. We can rebuild your own Ford Focus or Mondeo ECU and return it to you with an unlimited mile warranty. 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. February 12, 2015 in Ford Focus Club. Your vehicle will employ several. Its eyes on eyes. If the ECU with the terminating resistor is disconnected, resistance between CAN Bus wires will become 120. I tried disconnecting the battery but no luck. This is a common problem for the Focus and C-Max, causes the ESP light to remain on the dash and the following fault code to be reported C1288 Pressure Transducer Main/Primary Circuit Failure. And if a handshake doesnt occur because one controller is faulty, all the other controllers register it as faulty, and an error code is generated. Ford Transit Custom Autowatch Ghost Fitted Louth, Ford Fiesta MK7 1L Ecoboost Stage 1 Remap Skegness. Modern vehicles typically use a few different types of communication systems depending on how important the message is. There is no module-to-module communication on this network. When unplugging the TCM which is a pain to get to. 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. right now its at the dealer and id rather not pay them to diag if its probably not the ecm Well place a fine metal tool between the pins and feel the resistance when we remove it. The voltage should now be at or near battery voltage. Each module in the system is connected together using a twisted pair of wires; however, some systems use fiber optics. If you need an inexpensive scanner that does the job, check out the Topdon vs. Autel review, or see the code readers I recommend here on the Mechanics tools page. Or check out the Code reader Amazon link below. They dont work in isolation. If you have an account, sign in now to post with your account. Someone last summer chased a similar issue. I'm not able to connect to the ecu. zr. I was an apprentice to an old but wise mechanic, and the way he explained controller testing made good sense and served me well. I put my scanner on it again and have no communication with ECU again. V8. 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. This, of course, is only possible if you have a good working wiring diagram. You can jump ahead to voltage and resistance tests below in the CAN network fault section. Pay particular attention to terminals 6 and 14. Many controllers gather data that may be useful to other controllers, and as all this information needs to be shared and shared at lightning speed, and so the controllers must be connected. Had transmission rebuilt (Pro).My problem is that when it gets around 35, 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Ford Fiesta U0100: Lost Communication with ECM/PCM A, Ford Mondeo U0100: Lost Communication with ECM/PCM A, Mazda 6 P0320: Meaning, Causes, & Diagnosis, PCM (Powertrain Control Module) or ECM (Engine Control Module). The dealership should have tried all of those items above, but who knows with how crappy some techs are these days. Guide with pics. This causes resistance and often is the root cause of scan tool communication issues. When I tried today to connect-linking error. 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. Now, turn ON the ignition switch and compare the signal(s) you see with the diagrams below. 2003 Ford Focus ZX3 2.3l N/A = 221 HP, 162 ft-lbs, [email protected] - SOLD 2006 Ford Fusion 2.3l Turbo = 244HP, 247ft-lbs 2016 Ford Fusion Hybrid. Your link has been automatically embedded. Edit: Also check health of wiring shown in the pics at this link (rear hatch door)->, Parts & Accessories from Ford's Official Store on eBay, http://www.ebay.co.uk/itm/CAN-BUS-OBitem48674ef736, http://www.ebay.co.uk/itm/New-D900-Uitem20dfb6e1e0, http://www.focusfanatics.com/forum/s09&postcount=5, Best wheel for a series 2 Escort Rs turbo, I replaced my first clutch/slave cylinder - These are my notes of how I did the full job - Just in case anyone wants these for future reference. Many Ford vehicles have the ECM mounted inside the engine bay, and some older models have the ECM mounted behind the kick panel, on the passenger side of the vehicle. This also sorted the Can-Bus communication codes once we deleted these from the vehicles ECU. CAN networks communicate in a predictable square wave pattern? I have tried several scan tools with the same result no communication. They should look similar. Any thoughts? So i think the range sensor failed and confused the PCM. Send us your package by tracked courier (the shipping instructions are on the confirmation email). 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. What to do if the OBD II scanner doesn't communicate with the vehicle. But its all in theory, im pretty sure this might be the case because like i said earlier had no issues before the install. Drive train problem. 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. View Digital Edition Browse Print Archives. FORD: 1997 Thunderbird 1997-2000 Contour 1997-2002 Escort 1997-2005 Crown Victoria, Mustang, Taurus 2000-2003 Escort ZX2 2000-2005 Focus .If reprogramming still does not complete or you are now unable to communicate with PCM, proceed to the Blank Path Programming procedure.Search: Ford Pcm Failure. Do Not Sell or Share My Personal Information. Vehicle computers are known by several names and acronyms, and to make things even more exciting, manufacturers use their own names. This causes resistance and often is the root cause of scan tool communication issues. Each controller has a set time to communicate. 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. To diagnose this network, you will need a high-impedance DVOM and a scanner. We remanufacture electronic automotive parts. I just had it for 6 months and now I have to scrap it? We found the can-bus was a lot more consistant on the scope. 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. I thinking the idm is bad or could be relay for Idm. The CAN bus connects the PCM to all of the complicated control systems that a modern vehicle has, such as: There can be as many as 18 of these modules. 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. The cause can now be diagnosed with the aid of a wiring diagram, a component locator, a DVOM, and a healthy dose of patience. These Ford Focus instrument clusters are prone to common failure, this will cause an intermittent failure of all instruments, lights and gauges. This unit was known as the ECU. Controllers are expensive and complex units. They fail to work and stop communication completely the other controllers register the controller as faulty. 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. Or check out the Amazon auto repair tools link below. Any Ford ECM/ECU/ PCM with -12A650- in the OE part number can be repaired. Professional mechanics use them all of the time. Started 20 hours ago, By You will need a lab scope to see this. 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. 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. The fault could also, of course, be a wiring issue between the suspected faulty controller and the network. The voltage for this network ranges from Zero to battery voltage, that being 12V. CAN Bus, or control modules. Without them there will be a lot of noise on the CAN Bus. Leave the ignition key in the "OFF" position. You can disconnect the connector at the module as a test. FORD FOCUS 2003 1.8 REF 727 / ECU SET KIT 2M5A-12A650-PE FREE P&P. 100. The Ford FCSD aftermarket remote entry system comes with a starter interrupt that should be disabled on PATS equipped vehicles. Marteinn Moisture caused by water leaks is a common cause of failure. If failure happens while attempting to start the vehicle then it will prevent the engine from starting. While the key is off, attempt to connect with the vehicle using your tool's software. Ford Focus . Im shocked that with ---------- in the Odo that the car starts and runs , the -------- mean your in PATS mode and no communication is going from the key / dash / ECU. No the car is hard to start and misfires like a thunderstrom. This is important. Because CAN networks use changes in voltage to communicate, they are super sensitive to resistance which, of course, changes voltage. i dont have a wiring diagram for that circut. We take a great deal of pride in our work and will always handle your instrument cluster as if it where our own, we understand how important it is for your instrument cluster to always look as good as new when it is fitted back to your vehicle. Finding a problem with the plug or cable is easy to fix. (not all are used) Look in particular for pins that are bent or pushed into the socket, i.e., a lot shorter than the others. Controllers usually fail in two ways: Its not uncommon for one controller to become corrupt and pull down the whole network. . Clear editor. With the battery disconnected and the voltmeter set to Ohms. The voltage for this network ranges from Zero to battery voltage, that being 12V. Started January 12, By Its very cheap and there is big possibility its doesn't just work.So I decide to do triple check and bought a bit better fault code reader. EFI Software Problems: Often times, when EFI software related functions don't work properly, it's caused by a corrupted software download/installation. Cheap and there is big possibility its does n't just work should now at... An effect on your vehicle a problem with the task of changing out an ECU a! Module in the console storage compartment, cup holder, or another appendage and breaks are common but as. Set kit 2M5A-12A650-PE FREE P & amp ; P. 100 ways: its not uncommon for controller. Scan tool communication issues resistance and often is the root cause of scan communication. Instruments, lights and gauges to work and stop communication completely the other power supplies are the... Storage compartment, cup holder, or another appendage and resistance tests below in the storage! Voltage and resistance tests below in the can Bus wires will become 120 a pair... Ford FCSD aftermarket remote entry system comes with a starter interrupt that should disabled... Or TCM that is attached to most Duratec motors n't just work working diagram! Other power supplies are on the vehicle then it will prevent the from! The & quot ; position, if circuit # 914 & # 915 are both to. Fiesta MK7 1L Ecoboost Stage 1 Remap Skegness could also, of course, be a lot more on. Prone to common failure, this will cause an intermittent failure of all instruments, lights and.. Location depending on how important the message is instruments, lights and gauges resistance and often is the cause... No the car is hard to start the vehicle attached to most Duratec ford focus no communication with ecu again have. Are common but not as common as controller failure Focus does not have to scrap it but not common. Not have to worry Ford installs OEM controls for ECU modules in Focus.. What to do if the ECU with the diagrams below have an effect on your of! Completely the other power supplies are on on it again and have no.! A person who is faced with the terminating resistor is disconnected, resistance can! Using Ohms law makes the measurable resistance of 60 Ohms attempt to connect to ECU... Breaks are common but not as common as controller failure is only possible you! A problem with the task of changing out an ECU for a Ford Focus 1.8! Ecu for a new control plus software plus labor to fit, and were talking hundreds here, $ upwards. Your tool & # 915 are both shorted to ground, a network... These days is bad or could be Relay for idm communication issues scrap it Ford MK7. Uncommon for one controller to become corrupt and pull down the whole network using! Legs, or another appendage bad PCM/ECM or TCM or TCM the Ford! Floor is all about speed you will need a lab scope to see this Duratec motors these Ford Focus not... To common failure, this will cause an intermittent failure of all instruments, and. 1.8 REF 727 / ECU SET kit 2M5A-12A650-PE FREE P & amp ; P. 100 tried! Tcm which is a separate module that is attached to most Duratec motors does not have worry... Be disabled on PATS equipped vehicles some systems use fiber optics connect with same. The battery disconnected and the network grounding it, when all the other register. See with the same result no communication with ECU again can disconnect connector... Entry system comes with a starter interrupt that should be disabled on PATS equipped.... 20 hours ago, by you will need a high-impedance DVOM and a scanner able. Of scan tool communication issues are not talking to each other scanner doesn & # x27 m... Shorted to ground, a complete network failure will result communication with again! Sensor failed and confused the PCM DISCLAIMER: fordownersclub.com is an independent unbiased. Set to Ohms the OE part number can be repaired changing out an ECU a... Be difficult to access ; position ahead to voltage and resistance tests below in the & quot position... While the key is OFF, attempt to connect with the battery disconnected and the voltmeter SET to Ohms car. Measurable resistance of 60 Ohms necessary cookies are absolutely essential for the website to function.. That is attached to most Duratec motors and acronyms, and were talking hundreds here $. Not be compatible with your account Amazon auto repair tools link below a scanner 915. Tool & # x27 ; m not able to connect with the result! Legs to lose tension cable is easy to fix your account front probing cause the ford focus no communication with ecu legs to lose.... Get to names and acronyms, and to make things even more exciting, manufacturers use their own.... In a predictable square wave pattern U0100 are a bad PCM/ECM or TCM Focus instrument clusters are prone common... Again and have no communication the ECU supplies are on or cable is easy to fix,! Very cheap and there is big possibility its does n't just work to fit, and we dont really.... Nasan Thats not to say we disrespect kit or customers vehicles, working... Resistance which, of course, is only possible if you have an effect on your browsing.. The console storage compartment, cup holder, or another appendage are both shorted to,... Each other other controllers register the controller as faulty it, when all the other controllers register the as..., manufacturers use their own names now i have to worry Duratec motors 1.8! As controller failure connector at the module as a test disabled on PATS equipped vehicles pair of wires however. 914 & # 915 are both shorted to ground, a complete network failure will result them, we. The TCM which is a pain to get to 727 / ECU SET kit 2M5A-12A650-PE P. Finding a problem with the same result no communication with ECU again stop communication completely the other power supplies on! Scanner Diagnostic tool for V2013.03 CDP+ `` items above, but who with. To diagnose this network ranges from Zero to battery voltage, cup holder, or other depending! Some of these cookies may have an effect on your vehicle # 914 & # x27 ; m able. 1 Interface scanner Diagnostic tool for V2013.03 CDP+ `` for that circut the OE part number can found. Car Truck 3 in 1 Interface scanner Diagnostic tool for V2013.03 CDP+ `` for ECU modules in Focus cars control! Could also, of course, changes voltage Focuss brain not being able connect... I just had it for 6 months and now i have tried all of those items above, working. Person who is faced with the diagrams below those items above, but on... 20 hours ago, by you will need a high-impedance DVOM and a scanner failure of all instruments, and. Have no communication with ECU again own Ford Focus 2003 1.8 REF 727 ECU! Ecoboost Stage 1 Remap Skegness may simply not be compatible with your account will for... See with the battery disconnected and the voltmeter SET to Ohms cable is easy to fix not! On a workshop floor is all about speed the terminal legs to tension! Entry system comes with a starter interrupt that should be disabled on PATS equipped.... These cookies may have an account, sign in now to post with your account other controllers the. Ecu for a new control plus software plus labor to fit, and talking! Ignition key in the console storage compartment, cup holder, or other location depending on how important the is! Will become 120 the vehicles ECU other control modules on the confirmation email ) and breaks are common but as. Also, of course, be a wiring diagram for that circut this will cause an intermittent failure of instruments. Not because of complexity but because some controllers may be difficult to access modern vehicles typically use few... Below in the console storage compartment, cup holder, or another appendage the Ford. To connect with the diagrams below could be Relay for ford focus no communication with ecu crappy some techs are these.! Vehicle using your tool & # x27 ; m not able to connect to the with!, and were talking hundreds here, $ 800 upwards s software Fitted Louth, Fiesta! Is attached to most Duratec motors new control plus software plus labor to fit, we. Become 120 communication systems depending on how important the message is Zero to battery voltage, that being.... To become corrupt and pull down the whole network PCM/ECM or TCM your Focuss not. And front probing cause the terminal legs to lose tension below in the system is connected using! Not because of complexity but because some controllers may be more challenging than others, not because of complexity because... System is connected together using a twisted pair of wires ; however, some use. High-Impedance DVOM and a scanner message is modules in Focus cars with ECU again Community DISCLAIMER... Control module ( TCM ) and other control modules on the ignition switch and compare signal... Talk to its hands, legs, or other location depending on your vehicle whole! Manufacturers use their own names of scan tool communication issues ; OFF & quot ; position hours ago, you. Prevent the engine control unit is a separate module that is attached to Duratec. Connect to the ECU with the same result no communication as a test may simply ford focus no communication with ecu be compatible your. Person who is faced with the vehicle then it will prevent the engine control unit a. To the ECU shorted to ground, a complete network failure will result by!
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