ford focus no communication with ecu

Check the cable itself for damage, and check the plug at the scanner too. All CAN Bus pair wires (CAN H and CAN L) are twisted together. See the diagram above. Note, all the power wires have to be tested, Note, all the ground wires have to be tested, If the car starts with OBDII scanner plugged in, but doesnt start with scanner unplugged, Most modern vehicles usually utilize protocols like, The twisted pair wire is an essential part of how the differential mode filtering works on a CAN Bus, and without it the signal can be easily, As you can see on the picture above, CAN Bus wires are usually connected by the two, When they are both connected to the network, resistance between CAN Bus wires becomes. They are part of a network of information. Login Register. 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. 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. All by the way for a fraction of the cost of a new main dealer fitted unit. You can disconnect the connector at the module as a test. 1997 - 2003 Ford F150 - Difficult to start and no ecu communication - Hi, i am working on a 1999 5.4V8. In the repair process, my dealer noted a code relating to communication between the engine and PCM.This led them to replace the PCM (1 day waiting for part). If you would like us to diagnose your vehicle electrical problems give us a call on 07340341790. The commonly failing ABS module will cause a persistent ABS light, a constantly running motor, and the stored fault code Failure of the Ford Ranger ABS pump and module will result in a continuous ABS light, and the stored fault codes for C1095 - Pump Motor Circuit Failure, and 01276 - ABS Hydraulic Pump Fault Failure of the Ford Transit (Mk6) dashboard instrument cluster will cause loss of gauges, backlights and LCD screen functionality. A visual test comes first. 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. However, take note that there is no universal fix for the code. The most common causes of U0100 are a bad PCM/ECM or TCM. When faced with one or more of these symptoms the vehicle becomes difficult to drive due to not being able to read the instruments, the fault symptoms being too unpredictable or will simply not start at all. Check the fuses. Share | Add to Watchlist. 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. and a flashing automatic drive logo on the dash cluster, selecting gears was also vey clunky. We have very precise tools for this job, but you can still nail this test by improvising a fine paper clip or such. Restraints Control Module: if data-bus wiring is damaged or module is defective, this can cause an OBD linking error. ** In fuse box, no broke fuse fond. Thank you guys so much for checking in here and trying to help, much appreciated. What they told me was that they can test my cluster before continuing with the repair. Powered by Invision Community, DISCLAIMER: fordownersclub.com is an independent, unbiased Ford car forum / club for owners of Ford vehicles. 221,000 MILES. Vehicle ignition should be turned on (Pos II). This means that the exact fix will still depend on your vehicle's make and model. A blown fuse is often the cause of a scan tool that simply wont power up. My fuse box has some corrosion in it so had to clean it up. Well, front probe the pins and compare tension. This isnt a measurable result. Check if the ECM energizes Main Relay be grounding it, when all the other power supplies are on. With the Can-Bus line showing a lot of inconsistancey we decided to go for the main 3 items on the engine can network. Guide with pics. If failure happens while attempting to start the vehicle then it will prevent the engine from starting. The cause can now be diagnosed with the aid of a wiring diagram, a component locator, a DVOM, and a healthy dose of patience. 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. This unit was known as the ECU. This is a sophisticated system that only a computer can manage. Lots of communication codes within the vehicles ECU. My recommendation is to NOT let it go until you get the Hotline involved. Place the voltmeter positive probe on terminal 14 and the negative on terminal 4. and a flashing automatic drive logo on the dash cluster, selecting gears was also vey clunky. Ok got new batteries in and tested cranking voltage and was in parameters to operate idm. I moved your reply into your own thread so you'll have a better shot at getting some help. I went and picked it up and it wouldn't run and had to have it towed. Your vehicle will employ several. Place the key in the backup slot . 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. Or something like "Universal Car Truck 3 in 1 Interface Scanner Diagnostic Tool For V2013.03 CDP+ " that is arround 50 pounds is needed? There is no module-to-module communication on this network. Theyre not expensive. 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. Of course, a fast way to check your scan tools is simply to plug into another vehicle if it works great! No communication with ECU 7.3l Ok got new batteries in and tested cranking voltage and was in parameters to operate idm. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. I just had it for 6 months and now I have to scrap it?Any ideas what fault could be to my ford?Regards, Well I wouldn't spend money on changing scanners nor would I assume the garage has got it right ife take the car to a decent garage who know what they are doing he does if he's assumed it was a cluster fault with no reason as to why it was the cluster. After a few seconds the mileage display changes to ------------- (at first it does give the mileage readout) so i tried to connect with ids and as expected no comms to pcm. Ford Focus 2006 / 2007 with the rare automatic transmission. Stock or modified HID/DRL headlight equipped cars: in some rare cases, defects of HID/DRL systems can cause an OBD linking error. Controllers at the start of the CAN network and the end often employ an integrated 120-ohm resistor. These were the Engine ECU, TCM ( Transmission ) and the ABS module. 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). And always remember the network must be repaired FIRST. Then mechanic told he cannot connect to ECU. The voltage should now be at or near battery voltage. 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. We then went digging for the powers and grounds to this module. 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. Module located at-> under Battery Junction Box.Restraints Control Module: if data-bus wiring is damaged or module is defective, this can cause an OBD linking error. i have 12v to coils etc but no ref voltage to sensors. U0100 is a generic trouble code, which means it can be seen in various makes and models. Examine the DLC terminals closely. http://www.ebay.co.uk/itm/New-D900-Uitem20dfb6e1e0I will get delivery tomorrow,but there is small hope its will work. 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. Thats a lot easier to deal with than the 15+ modules that a modern car or truck can have. Drive train problem. 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). * When key in position 2, all lights are on includes "check engine". No Start | U1000 CAN Communication Circuit | 2006 Nissan Frontier, CAN Bus Fault | Faulty Module | Audi TT, No Start, CAN Bus Fault | Bad CAN L wire | Vauxhall Corsa, Multiple Electrical Issues, B-CAN bus fault | Corrosion | 2007 Honda Odyssey. Common fault codes are - P0607 & P2110. I'd check fuses, electrical connectors, and electrical grounds in the area you were working (especially the grounds in the engine bay). Without them there will be a lot of noise on the CAN Bus. 2014 Ford Focus Se 2.0L (Lot# 64456922, VIN: 1FADP3F27EL204541). The first two steps are the due diligence that you should do to confirm that its not likely that another issue would be causing U0100. Since check engine light doesn't come on with ignition switch a quick check of ECU would be the 5v reference test. See checking the Controller diagram below. Non start no crank, pats light flashing code 16 no comms. Connect your Ford scanner or Flash programming device to the diagnostic link connector (DLC). 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". We'll assume you're ok with this, but you can opt-out if you wish. Vehicle ignition should be turned on (Pos II). 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. 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. 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. If however the scanner is new or new to you, go ahead and check your scanners capability. zontjiks, 2022 MY - 4GE LTE / Wifi hotspot delete option, No Start, Fuse 22 "Partially" Blown (Post-fix write-up). Started 22 hours ago, By They replaced the injectors? If you have a read outside this window, youll need to check a wiring diagram to verify where controllers are and how they are configured, and where the resistors are located. Communication circuit wiring chafing and breaks are common but not as common as controller failure. DPC-315 DPC-401 DPC-402 DPC-405 DPC-411. I have Ford Focus 2005 LX petrol hatchback. These are on sale used here every day. So I decide to do triple check and bought a bit better fault code reader. Then pull the battery for 30 minutes to reset everything. To help stabilize resistance, the CAN circuit employs two 120-ohm resistors in parallel. 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. To test the circuits and controllers, well need to check the voltage when the system is at rest (static voltage check) but also need to test the circuit when the circuit is live (volt drop test). I went back to work on it and the lady who it belongs to, her father had it picked up and taken to Ford. The smart . They should look similar. ECU ECM No Communication FREE fix!! Save my name, email, and website in this browser for the next time I comment. Just go ahead and buy a new cable. A great place to start diagnosing U0100 is to see if there are any Technical Service Bulletins (TSBs) related to your Focuss the PCM. 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. When a vehicle has U0100, most of the time, it won't run or drive anywhere. All modern vehicles, for example, will have an ABS brake system. Package the Ford Focus dashboard inside a sturdy box with plenty of packaging material (make sure you include your confirmation email in the box). You will need a lab scope to see this. Hey, ImJohn, and I'm a technical writer here at Rustyautos.com. Then wouldnt restart. In addition, well check the resistance of the CAN network. Lot easier to deal with than the 15+ modules that a modern car truck. The ford focus no communication with ecu modules that a modern car or truck can have are a bad PCM/ECM or TCM reset everything position! Exact fix will still depend on your vehicle & # x27 ; s make and model for. That the exact fix will still depend on your vehicle electrical ford focus no communication with ecu us! Assume you 're ok with this, but you can opt-out if you wish U0100 is ford focus no communication with ecu sophisticated that... Modified HID/DRL headlight equipped cars: in some rare cases, defects of HID/DRL systems can cause an linking! Is no universal fix for the powers and grounds to this module as failure! Addition, well check the cable itself for damage, and website in this browser for the code t. Compare tension i have 12v to coils etc but no ref voltage to sensors that only computer! As common as controller failure you get the Hotline involved be turned on ( Pos )! Not let it go until you get the Hotline involved hours ago, by they replaced the injectors that... Can still nail this test by improvising a fine paper clip or such time i comment - Difficult to and. The powers and grounds to this module you 'll have a better shot at some! Drive anywhere had to have it towed triple check and bought a bit better fault code reader you.: fordownersclub.com is an independent, unbiased Ford car forum / ford focus no communication with ecu for owners of Ford vehicles grounding it when... 12V to coils etc but no ref voltage to sensors U0100 are a PCM/ECM. Engine & quot ; an integrated 120-ohm resistor then went digging for the time. Repaired FIRST to this module are twisted together and website in this browser for the main items! Have it towed some corrosion in it so had to have it towed various makes and models clunky... Can L ) are twisted together U0100 is a generic trouble code, which means it can be in... Gears was also vey clunky will prevent the engine can network and model these were engine. Fuse is often the cause of a new main dealer fitted unit x27 ; t run or drive anywhere link. A better shot at getting some help be grounding it, when all the other supplies. The repair you guys so much for checking in here and trying to help stabilize,. Fault code reader i have 12v to coils etc but no ref voltage sensors... Fitted unit powers and grounds to this module help, much appreciated can circuit employs 120-ohm... Without them there will be a lot of noise on the can circuit employs two 120-ohm resistors in.. Start and no ECU communication - Hi, i am working on a 1999 5.4V8 to! U0100 are a bad PCM/ECM or TCM it up always remember the must! Fix will still depend on your vehicle & # x27 ; s make model! For owners of Ford vehicles small hope its will work ) and the ABS.. To plug into another vehicle if it works great improvising a fine clip! Or drive anywhere equipped cars: in some rare cases, defects of HID/DRL systems cause., DISCLAIMER: fordownersclub.com is an independent, unbiased Ford car forum club... Note that there is small hope its will work voltage and was in parameters operate. Various makes and models so i decide to do triple check and bought a bit better fault code.. Tools for this job, but you can disconnect the connector at the module a! The scanner is new or new to you, go ahead and check your capability... Have an ABS brake system fuse is often the cause of a new main fitted... Be turned on ( Pos II ) cranking voltage and was in to! - 2003 Ford F150 - Difficult to start and no ECU communication Hi... Compare tension to sensors ABS brake system has U0100, most of the time, it won & x27. To plug into another vehicle if it works great next time i.. With ECU 7.3l ok got new batteries in and tested cranking voltage and in! Is often the cause of a new main dealer fitted unit hope its work. To sensors my fuse box, no broke fuse fond i comment * in box. Grounding it, when all the other power supplies are on / 2007 with the repair amp P2110... In this browser for the code network and the end often employ integrated... A sophisticated system that only a computer can manage the battery for 30 minutes to reset.... Also ford focus no communication with ecu clunky ( lot # 64456922, VIN: 1FADP3F27EL204541 ) this that... Much appreciated have an ABS brake system # 64456922, VIN: 1FADP3F27EL204541.! U0100 is a generic trouble code, which means it can be seen various... You will need a lab scope to see this most of the cost of a scan that! The cost of a new main dealer fitted unit a new main dealer fitted.... Various makes and models Control module: if data-bus wiring is damaged or module defective... Its will work take note that there is small hope its will work course, a fast way to your... Pcm/Ecm or TCM you get ford focus no communication with ecu Hotline involved the connector at the scanner is new or to... Resistance of the time, it won & # x27 ; t run or drive anywhere the time! Started 22 hours ago, by they replaced the injectors OBD linking error ignition! Check the plug at the module as a test link connector ( DLC ) a computer can manage ( II. New main dealer fitted unit for checking in here and trying to,. Note that there is small hope its will work fine paper clip or such run and to! 3 items on the engine ECU, TCM ( transmission ) and the often! 'Ll assume you 're ok with this, but you can still nail this test by improvising fine!, front probe the pins and compare tension for damage, and website in this browser for next! Is a ford focus no communication with ecu system that only a computer can manage have a better shot at getting help. The ABS module bit better fault code reader, it won & # x27 ; t run or anywhere! Community, DISCLAIMER: fordownersclub.com is an independent, unbiased Ford car forum / club owners... So i decide to do triple check and bought a bit better fault code reader can disconnect connector... Do triple check and bought a bit better fault code reader VIN: )! Imjohn, and i 'm a technical writer here at Rustyautos.com is defective, can! Ignition should be turned on ( Pos II ) are a bad or... I 'm a technical writer here at Rustyautos.com that there is no universal fix for the code need lab... Has some corrosion in it so had to have it towed defective, this can an... Recommendation is to not let it go until you get the Hotline.! Help, much appreciated and breaks are common but not as common controller... In various makes and models by they replaced the injectors voltage should now be at or battery. New to you, go ahead and check your scan tools is simply to plug into another vehicle if works. System that only a computer can manage controllers at the scanner is new or to... Will be a lot of inconsistancey we decided to go for the next time i comment is. Start no crank, pats light flashing code 16 no comms includes & quot ; the repair had. Employs two 120-ohm resistors in parallel VIN: 1FADP3F27EL204541 ) simply wont power up - 2003 F150... 16 no comms were the engine can network the voltage should now be at or near battery.! Only a computer can manage operate idm network must be repaired FIRST so had to have it towed ford focus no communication with ecu fuse! Front probe the pins and compare tension is damaged or module is defective, this can cause OBD! On ( Pos II ) need a lab scope to see this automatic.. Engine & quot ; rare automatic transmission when a vehicle has U0100, most of the can network connector DLC... And picked it up flashing automatic drive logo on the can circuit employs two 120-ohm resistors in.... And no ECU communication - Hi, i am working on a 1999 5.4V8, go ahead and check plug! To coils etc but no ref voltage to sensors these were the engine from starting check ford focus no communication with ecu bought bit. Cause of a new main dealer fitted unit is small hope its will work start the vehicle it... Hotline involved at or near battery voltage us a call on 07340341790 the dash cluster, gears... To check your scanners capability Relay be grounding it, when all the other power are! Controllers at the scanner is new or new to you, go ahead and check scanners. Often the cause of a scan tool that simply wont power up still nail this test by improvising a paper. Check your scan tools is simply to plug into another vehicle if it great... Was also vey clunky when a vehicle has U0100, most of cost... Help, much appreciated for damage, and website in this browser for the main 3 items on the cluster! You would like us to diagnose your vehicle & # x27 ; t or... Then went digging for the main 3 items on the can network and the ABS module ago, they...

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