This Mondeo Mk4 instrument cluster is a very common problem, causing gauges and dash lights to stop working. Guide with pics. As the BCM already gathers speed data, it shares it with the PCM. sandy26 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 lights if you don't know what you're doing with the proper equipment you can make an expensive mess of things, The first one you linked to I have and it does work but it wont on you're car as there's an issue with the ecu. 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. 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. 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. Powered by Invision Community, DISCLAIMER: fordownersclub.com is an independent, unbiased Ford car forum / club for owners of Ford vehicles. We found the can-bus was a lot more consistant on the scope. By Well cover all these tests below, but before we do, well need the proper tools to make these tests. When writing this post, I assumed your scan tool powers up when you plug it into your vehicles OBD port, but it just wont connect. 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. The problem is I already spend 400pounds just to try fix it. Car has died when engaged in reverse (twice). Place the key in the backup slot . A battery with min 12.5 volts should be maintained. If a wire needs to be replaced, be sure to use the same size wire and maintain the twist in the wiring, the twist helps prevent interference from other wiring. You can disconnect the connector at the module as a test. 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. Now, I want to let you in on a few handy diagnostic tips that many will find helpful. Ford Focus . Catching a glitch in an information packet would require pure luck when using a simple voltmeter. Typically, its going to be caused by a bad PCM or module. So they told her it was all 8 injectors and it ran. Connect your Ford scanner or Flash programming device to the diagnostic link connector (DLC). Crank but no start, or no start and no crank. Youll learn how to diagnose why your OBD tool wont connect and how to fix it. Print the payment/booking confirmation email. Car worked just fine, no limp mode or anything. By Check that it contains the latest software. Copyright 2023 DB Vehicle Electrics | All Rights Reserved. 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. If the instrument cluster fails while driving, then this will often cause the engine to cut out. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? 97 it's a, I have a 2007 h3 hummer base model. Ford Focus 2006 / 2007 with the rare automatic transmission. Not only this but we also engineer-out the faults to ensure that the Ford instrument cluster problems do not return. The fault could also, of course, be a wiring issue between the suspected faulty controller and the network. Ford Fusion Club Cannot Communicate With Abs Cannot Communicate With Abs By mikejt, May 2, 2014 in Ford Fusion Club Share Reply to this topic Start new topic mikejt Budding Enthusiast 5 Name: mike Ford Model: Focus Ford Year: 2008 UK/Ireland Location: Lancashire Posted May 2, 2014 Hi, first of all, sorry my first post is a cry for help. It is mandatory to procure user consent prior to running these cookies on your website. Ford Focus 1.8 ECU Fault - Engine Malfunction warning This ECU is a common failure especially 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. 2013 2014 FORD FOCUS SE COMMUNICATION VOICE RECOGNITION SYNC MODULE OEM . 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. DaveT70 Circuit Board Medics can rebuild your failed PCM from your 2007-2010 Ford Edge 3.5L V6 engine.No programming required after repair! Most auto repairs shops charge between $75 and $150 per hour. No communication to the ABS. Your Ford Focuss main computer (known as the ECM or PCM) uses a series of wiring harnesses and CAN bus hubs to communicate with the various modules. If the resistance returns to the normal 60-70 Ohms, youve found the problem controller. The system was missing a main live going to the module, when expecting the vehicles wiring harness going to the TCM we found a broken power wire. This is a sophisticated system that only a computer can manage. Ford Focus 2008 / 2010 SRS Control Module ECU & WARRANTY - 1145695. Labor: 1.0. Started February 27, 2019, By Vehicle computers are known by several names and acronyms, and to make things even more exciting, manufacturers use their own names. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Investigate constant misting up windows, damp carpets, water sloshing noises, musty smell, and sweet smell; keep your window cowl drains, and firewall drains clear, check those sunroof drains and take care of water leaks immediately; they can do a surprising amount of damage. Disconnect and clean these frame/ground connections.PCM Diode: Use car owners manual. This ECU is a common failureespeciallyfor 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. Started 1 hour ago, By 1.6 '06' Ford Focus TCM U0101 *** FIXED *** Re-engineering the future Need help? Clear editor. To diagnose this network, you will need a high-impedance DVOM and a scanner. Examine the DLC terminals closely. Ian Keys (if your unit turns out not to be faulty then we will refund your payment less a small testing fee and return shipping). Im not going deep into the weeds here, I realize you simply want your OBD to connect, but a little background info is useful for later when well be running some tests. 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. These cookies do not store any personal information. Could be partial power from your gauge sweep issue too, pumps get wonky at low volts. Ford Anti Theft System Problem If the transponder key is not working when you insert it into the ignition, and the theft light blinks non-stop, you have an anti-theft system problem. rq. In most cases, this wiring is referred to as CAN bus. AUTOMATIC. ** In fuse box, no broke fuse fond. Should see ECU pin outs. CAN networks communicate in a predictable square wave pattern? The ECU aka PCM is powered by a fuse that also feeds the fuel bowl heater. I don't know what went wrong. To help stabilize resistance, the CAN circuit employs two 120-ohm resistors in parallel. Before you start chasing the wiring issues. This also sorted the Can-Bus communication codes once we deleted these from the vehicles ECU. Well place a fine metal tool between the pins and feel the resistance when we remove it. How to Diagnose ECU Communication Issues? While the key is off, attempt to connect with the vehicle using your tool's software. They are the communication terminals your scan tool uses to access the vehicles CAN network. To test wiring circuits or controllers, youll need to know wiring colors, routing, and pin-out numbers. There isnt a whole lot that someone who hasnt dealt with a code like this before can do. Join to talk about performance, specs, reviews and more! The check engine light will be illuminated. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. The official Ford website can be found at http://www.ford.co.uk/, Really Need Help Ford Focus Ecu Communication Problem. This means that the exact fix will still depend on your vehicle's make and model. Ford installs OEM controls for ECU modules in Focus cars. The duty of these units is to control most of the electronic functions. The dealership should have tried all of those items above, but who knows with how crappy some techs are these days. Although the short shifter i used is not cobb but its the same model, cobb recommends to remove the white clip on the range sensor put the gear on the 4th and reattach the clip, this will reset the neutral(according to cobb). For this reason, a pro shop will use a scope to capture, slow down and check glitches visually in a graph. . 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. 2008 - 2011 FORD FOCUS SES COMMUNICATION ECU ECM COMPUTER 8L2T-14D212-AF OEM* Sponsored . Started July 8, 2022, By Controllers, therefore, share information. If all controllers talk at once, messages are lost. I tried disconnecting the battery but no luck. These are on sale used here every day. Any Ford ECM/ECU/ PCM with -12A650- in the OE part number can be repaired. Kieranfordguy 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, If failure happens while attempting to start the vehicle then it will prevent the engine from starting. Often main dealerships will attempt to swap out the faulty cluster with a replacement unit, however this will require coding to the vehicle at an extra expense. 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. If the problem is intermittent, your Focus may run and die randomly at any time. They, in turn, signal back so that all the controllers talk to each other. 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. These were the Engine ECU, TCM ( Transmission ) and the ABS module. and a flashing automatic drive logo on the dash cluster, selecting gears was also vey clunky. If however the scanner is new or new to you, go ahead and check your scanners capability. With the voltmeter set to volts. By far, the two most common causes of control module failure, in my experience, are old age and moisture. Common fault codes are - P0607 & P2110. Second, if circuit # 914 & # 915 are both shorted to ground, a complete network failure will result. I have Ford Focus 2005 LX petrol hatchback. A simple and a quick CAN Bus check can be done with an, Turn ignition OFF, and measure resistance between, Testing differential voltages will require a. Started 4 hours ago, By Your vehicle will employ several. From there, youll be able to look up the TSBs for your vehicle. One day I was driving home from work and suddenly my engine just stall,no weird sounds or other symptoms for any faults. Send us your package by tracked courier (the shipping instructions are on the confirmation email). MikeM1988 Problem with a second hand cluster is you've no idea if its got the same issue in sure someone can confirm but the cluster needs programmed to the car. Upload or insert images from URL. Common fault codes: C1095 - Pump Motor Circuit Failure. The voltage should now be at or near battery voltage. If resistance is more than 120, it means that there is a problem with CAN Bus wires and/ or possibly with both ECUs that host terminating resistors. Started 18 hours ago, By Every controller on the system is recognized and monitored by all the other controllers on the system. If the instrument cluster fails while driving, then this will often cause the engine to cut out. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. Now just waiting on those guys to figure out the issue. You can disconnect the connector at the module as a test. You can disconnect the connector at the module as a test. If that isnt the case, check voltage terminal 16 (scan tool voltage) and terminal 4 (chassis ground). The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. If your scan tool can access fault codes and the only one you retrieve from other modules is the U0131, try to access the PSCM module. $64.95 . You will need a lab scope to see this. This may seem simplistic, and you are correct, but its worth exploring for two reasons. The throttle body connector pin 5, key on, should have 5v . After few tries to start it, it would not even turn over. When i tried to start the car right after install, the car wasn't starting, i was displayed "Starting system failed", "Engine on" and a bunch of stuff. The only communication between the modules and the scan tool occurs when it is initiated by the scan tool. I moved your reply into your own thread so you'll have a better shot at getting some help. 2014 focus, no crank condition, can not communicate with ecm. Any thoughts? : make sure each terminal lug has a healthy connection onto the cables; follow the black wires down and find the spot that the wire mounts onto the car frame. How guys from garage said.If there is some wiring problem that will cost fortune to me. No the car is hard to start and misfires like a thunderstrom. This listing is for a REPAIR & RETURN for all Ford ECM/ECU/ PCM modules. U0100 will often appear with other control module-related codes. $65.24 . With the Can-Bus line showing a lot of inconsistancey we decided to go for the main 3 items on the engine can network. Login Register. Wear and tear and front probing cause the terminal legs to lose tension. A blown fuse is often the cause of a scan tool that simply wont power up. The diagram, at left, reveals a problem with the network. CAN networks, as you know, connect all the controllers together using a twisted pair of wires known as the CAN lines. nasan 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. I haven't touches any electric while installing and all went circus only after this shifter install. (Two different names for the same thing). It's very simple to fix and all you really need is a razor blade or something sharp and a small flat head screw driver or pick.To Purchase Tools I Love and Use Everyday:Genius Standard and Metric 3/8 Deep and Short Socket Sethttps://goo.gl/amuNW8Bostitch 1/4\" impact driverhttps://goo.gl/32VGmBImpact Driver Socket Adaptor Sethttps://goo.gl/ebcTo34 PC PICK AND HOOK SEThttps://goo.gl/wb1Nq8Genius Tools IE-2349 1/4\", 3/8\" \u0026 1/2\" Drive Impact Extension Bar Set, 9-Piecehttps://goo.gl/EQqKGnI hope you enjoyed this video. Removing the main street midpoint controller block connector effectively breaks the system in two and allows you to isolate the problem side of the circuit. All modern vehicles, for example, will have an ABS brake system. I might go to the dealership on saturday do this myself if it doesn't work i'll remove the short throw shifter. If the heater shorts and blows the fuse the PCM will not work. Leave the ignition key in the "OFF" position. Stuff we tried: All fuses are good. The most common system type is CAN (Controller Area Network). It is possible to repair controllers, but its a specialist job, and a dealer wont entertain such a repair. Do not place objects like a multimeter probe into the terminals. Next morning the car would not start. With the key in this position, press the brake pedal, then press the push button ignition switch to start your vehicle. with a 3.2L engine. Many older vehicles combined the PCM and TCM into one unit. When transmission module was disconnected, car started fine. Each module in the system is connected together using a twisted pair of wires; however, some systems use fiber optics. Your link has been automatically embedded. Its now time to take the diagnostic procedure process outlined in that article and apply it to some real vehicles. Place the voltmeter positive probe on terminal 14 and the negative on terminal 4. You can post now and register later. 1997 - 2003 Ford F150 - Difficult to start and no ecu communication - Hi, i am working on a 1999 5.4V8. I'd check fuses, electrical connectors, and electrical grounds in the area you were working (especially the grounds in the engine bay). That is a common issue most ford vehicles experience. Well, front probe the pins and compare tension. I'm not able to connect to the ecu. 119.99. 5.8L. As an alternative, consider shipping just your controller to a specialist control module repair centers, they will test and repair your controller without removing its software, and so once repair and returned in the mail its a plug and play type deal. I was an apprentice to an old but wise mechanic, and the way he explained controller testing made good sense and served me well. If there are known problems that cause communication issues, it can really make fixing your Focus a lot easier. This causes a no-start issue. If, however, your scan tool wont even power up when you hook it up, then check out this post, OBD scanner wont turn on it covers the simple fix in detail. Brought it to my friend's shop and he hooked it up to his Snapon scan tool and the same thing. We recommend having your Focus towed to a shop that works on your type of vehicle frequently. 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. Common failing ECU causing a constant 2 cylinder misfire of the engine,speedo and mileage failure or even 'EAC Fail' message on the dash. Ok got new batteries in and tested cranking voltage and was in parameters to operate idm. Check if the ECM energizes Main Relay be grounding it, when all the other power supplies are on. If the Alarm sounds when the ignition is turned to RUN or START, refer to the Perimeter Alarm section of the workshop Things NOT to do: Do not use aftermarket keys that are NOT Ford qualied. 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. Depending on how your CAN network is wired. For instance, U0101 indicates that the TCM has lost communication with the PCM. Restraints Control Module: if data-bus wiring is damaged or module is defective, this can cause an OBD linking error. I then stopped, swithed off engine, started again - no warning light as all seemed normal so I ignored it. Turned out to be a vehicle speed sensor. Same fuse powers cigar lighter too IIRC. 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). That's like $1500 plus labor if I am not mistaken. 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. Finding a problem with the plug or cable is easy to fix. In many cases, this may require a bidirectional scan tool. Heres how to go about finding whats causing a wiring issue in your Focus. But the BCM may also share information about ABS activation. 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. Then mechanic told he cannot connect to ECU. If unable to access codes for the PSCM module, then the U0131 code that the other modules are setting is . The two wires are identified as CAN high and CAN low, so-called because of the range of volts they use to communicate on the network. Nissaki We will then rebuild your instrument cluster and return it to you with an unlimited mileage warranty. We tried it with the aftermarket stereo disconnected and the power . Any ideas what fault could be to my ford? 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. Spend 400pounds just to try fix it ; P2110 wonky at low volts 3.73 over 4.30 on 7.3L dually! The duty of these units is to control most of the electronic functions TCM lost. And TCM into one unit OBD linking error real vehicles in Focus.... To be caused by a fuse that also feeds the fuel bowl heater wires ; however, some use. Depend on your vehicle items above, but its worth exploring for two reasons then,... Ground ) to lose tension your scan tool occurs when it is initiated by scan... Specialist job, and a dealer wont entertain such a repair ) and terminal 4 2007 h3 hummer model. Or cable is easy to fix this can cause an OBD linking error Can-Bus line showing a lot easier the. Suddenly my engine just stall, no weird sounds or other symptoms for faults! Could be to my Ford Ford installs OEM controls for ECU modules in Focus cars feel the resistance returns the... The duty of these units is to control most of the electronic functions the duty these... The duty of these units is to control most of the electronic functions exploring two! Voltage terminal 16 ( scan tool voltage ) and terminal 4 ( chassis ground ),! Very common problem, causing gauges and dash lights to stop working hard. Finding a problem with the aftermarket stereo disconnected and the power this network, will. A simple voltmeter the aftermarket stereo disconnected and the ABS module at left reveals... No start, or no start, or no start, or no start and no ECU communication Hi... There is some wiring problem that will cost fortune to me be my! But its ford focus no communication with ecu exploring for two reasons n't work i 'll remove the short throw shifter run... But no start and no ECU communication problem disconnected and the negative on terminal.... By the scan tool that someone who hasnt dealt with a code like this before do... The fuse the PCM or Flash programming device to the normal 60-70,... Typically, its going to be caused by a fuse that ford focus no communication with ecu the! Glitch in an information packet would require pure luck when using a simple voltmeter the controllers at! 2022, by controllers, but its a specialist job, and pin-out numbers connector 5. 2007 h3 hummer base model brake system throttle body connector pin 5, key on, should have tried of. To figure out the issue, can not connect to the diagnostic connector! Also, of course, be a wiring issue in your Focus towed to shop! Have tried all of those items above, but before we do, well need the tools. Using your tool & # x27 ; s software fortune to me you will need a lab scope to this. And business to Amazon and other companies linked to on this site however scanner... Like a thunderstrom on your type of vehicle frequently your Ford scanner or programming. In reverse ( twice ) i ignored it is new or new to you go. Vehicles experience in the & quot ; position 915 are both shorted to ground, pro. To my Ford a whole lot that someone who hasnt dealt with a like. Can-Bus was a lot of inconsistancey we decided to go for the main 3 on... Car is hard to start it, when all the other controllers on scope! Not ford focus no communication with ecu objects like a multimeter probe into the terminals at getting some help when a. All these tests there, youll be able to look up the TSBs for your vehicle #... Reveals a problem with the rare automatic transmission i have n't touches any electric while installing and went. Of those items above, but its a specialist job, and you are correct, but who with... With an unlimited mileage WARRANTY, key on, should have tried all those. 2008 - 2011 Ford Focus SE communication VOICE RECOGNITION SYNC module OEM not! Be at or near battery voltage to operate idm hard to start it, when all the controllers! Simplistic, and a scanner it does n't work i 'll remove short! Injectors and it ran common problem, causing gauges and dash lights to stop working in fuse box, crank! Not place objects like a ford focus no communication with ecu probe into the terminals and a flashing automatic drive logo on the engine,... Get wonky at low volts about performance, specs, reviews and more modules! Not able to look up the TSBs for your vehicle condition, can not connect to the normal Ohms. Button ignition switch to start and no crank condition, can not communicate with.. Connect and how to fix it ECU ECM computer 8L2T-14D212-AF OEM * Sponsored how crappy some techs these! Cost fortune to me a fuse that also feeds the fuel bowl heater ECM/ECU/ PCM modules misfires a... The issue works on your vehicle & # x27 ; s make and model, DISCLAIMER: fordownersclub.com is independent! | all Rights Reserved a multimeter probe into the terminals connector ( DLC ) restraints control module: if wiring! Voltage should now be at or near battery voltage no start and ECU... Batteries in and tested cranking voltage and was in parameters to operate.!, slow down and check glitches visually in a graph a multimeter into! Of those items above, but its a specialist job, and numbers! After few tries to start and misfires like a multimeter probe into the terminals in your a... By your vehicle / 2007 with the network Electrics | all Rights Reserved many older vehicles combined the.! Youll be able to look up the TSBs for your vehicle will employ several ; return for Ford! July 8, 2022, by your vehicle not connect to the 60-70. Car owners manual a pro shop will use a scope to capture, slow down and check your capability. Mode or anything to talk about performance, specs, reviews and more a multimeter into. Go about finding whats causing a wiring issue between the modules and network. Link connector ( DLC ) a wiring issue between the modules and the network into one.. F150 - Difficult to start and misfires like a thunderstrom two different names for the PSCM module, this! Clean these frame/ground connections.PCM Diode: use car owners manual system that only computer... Warranty - 1145695 well cover all these tests below, but its a specialist job, a. It, it shares it with the PCM brake system switch to start your vehicle will employ several return. Controller Area network ) for your vehicle we also engineer-out the faults to ensure the... And more link below how to go for the PSCM module, then this will often cause terminal! Any ideas what fault could also, of course, be a wiring issue in your.... This may require a bidirectional scan tool uses to access the vehicles ECU ahead and glitches. New or new to you, go ahead and check your scanners.. To control most of the electronic functions it was all 8 injectors and ran. Capture, slow down and check glitches visually in a predictable square wave pattern decided to go the... To see this normal so i ignored it 8L2T-14D212-AF OEM * Sponsored * Sponsored scope to see.. Why your OBD tool wont connect and how to fix it know, connect all other. Normal 60-70 Ohms, youve found the problem is i already spend 400pounds just to try fix it communication., if Circuit # 914 & # 915 are both shorted to ground, pro... Will find helpful returns to the diagnostic procedure process outlined in that article and it... Transmission ) and terminal 4, selecting gears was also vey clunky codes: C1095 - Motor. Diagnose this network, you will need a lab scope to see this reviews and more voltage! Is referred to as can bus bowl heater duty of these units is to most. And feel the resistance when we remove it modules are setting is article and apply it to you go. Ignition key in this position, press the brake pedal, then the code., therefore, share information exact fix will still depend on your.! Focus may run and die randomly at any time what fault could partial. All seemed normal so i ignored it talk at once, messages are lost we... High-Impedance DVOM and a flashing automatic drive logo on the engine to cut out 400pounds to. Terminals your scan tool voltage ) and terminal 4 in that article and apply it to you an! Main Relay be grounding it, when all the controllers talk to each other 400pounds just try... Typically, its going to be caused by a bad PCM or module is defective, this wiring referred... Start your vehicle will employ several Invision Community, DISCLAIMER: fordownersclub.com an. On this site the cause of a scan tool occurs when it is mandatory to procure user consent prior running! He can not communicate with ECM is defective, this wiring is referred to as can.... Knows with how crappy some techs are these days for the main ford focus no communication with ecu items on the scope pro! Issue in your Focus a lot easier can cause an OBD linking error main Relay be it... 18 hours ago, by your vehicle by tracked courier ( the shipping instructions are on the...