Thats important to know for later when well be testing circuit resistance. 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. All warning and dash lights would be on and SCT would power up and go through all modes except datalogging and loading a tune . Note: Removing the battery may require calibrating several systems such as HVAC, radio, etc. 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! The readings between 1.5 and 2.5 volts indicate normal. When one of these modules loses communication with the PCM, the code U0100 will present itself. Any thoughts? These cookies do not store any personal information. I went and picked it up and it wouldn't run and had to have it towed. The ISO 9141 network, is a single-wire, and is often identified as Circuit 70. Alex.S Commonly failing Focus (Mk III) and C-Max (Mk II) engine ECU will prevent the vehicle from starting when it becomes faulty. I thinking the idm is bad or could be relay for Idm. Read More S-Max & Galaxy diesel engine ECU fault We remanufacture electronic automotive parts. The resistors are commonly controlled module integrated but may also be embedded in the circuit. Started 20 hours ago, By Started 22 hours ago, By I don't know what went wrong. We then went digging for the powers and grounds to this module. Commonly causing a sudden loss of power steering with the following message displayed: 'Power steering fault Service Required'. TomsFocus FOC Supporters 19.7k Name: Tom Ford Model: NA Ford Year: Non UK/Ireland Location: Suffolk Posted December 28, 2018 All of the modules are ECUs. 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. 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. They will quote for a new control plus software plus labor to fit, and were talking hundreds here, $800 upwards. We'll assume you're ok with this, but you can opt-out if you wish. Free shipping . This code tells you that communication has been lost between the ECM/PCM (main computer) and a particular control module has been completely lost. A blown fuse is often the cause of a scan tool that simply wont power up. This can help minimize the potential list of causes, making the repair much easier. Clean the battery terminals and other connections too: 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. Started 1 hour ago, By Free shipping for many products! Im passing it on. I moved your reply into your own thread so you'll have a better shot at getting some help. But still no communication with the ECU. 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. Well, front probe the pins and compare tension. Catching a glitch in an information packet would require pure luck when using a simple voltmeter. Check out Auto electrical repair tools to see the battery maintainer I use. You can disconnect the HID/DRL connectors or fuses as a test.Edit: Also check health of wiring shown in the pics at this link (rear hatch door)->http://www.focusfanatics.com/forum/s09&postcount=5. Just go ahead and buy a new cable. No Start | Shorted Vehicle Speed Sensor | 2002 Acura. The newer it is, the more likely it is that more modules are communicating with the PCM. (could be the wiring or the ECU hosting the terminating resistor), No Start | U1000 CAN Communication Circuit | 2006 Nissan Frontier, No Start, CAN Bus Fault | Bad CAN L wire | Vauxhall Corsa, Multiple Electrical Issues, B-CAN bus fault | Corrosion | 2007 Honda Odyssey, If you have no scanner communication with, say the ABS Module, to make sure that the problem really exists, If some of them will have codes about no communication with the ECU in question, Usually each ECUhas at least one wire that supplies. 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. If failure happens while attempting to start the vehicle then it will prevent the engine from starting. *** I have used Ancel AD410 and O'Reilly store's OBDII scanners, both were not communicated to ECU. 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. With the battery disconnected (ground terminal). Imobilizer light flashes rapidly. $55.00 . Garage charge 40 + per hour. ECU ECM No Communication FREE fix!! Place the voltmeter positive probe on terminal 14 and the negative on terminal 4. This is important. zontjiks, Last Sunday i installed the Autostyled Short shifter on the RS and put everything back together. Customer Support AIM: hpdyno Email: hpdyno@aol.com Phone: 704-249-3745 Site: focus-power.com Elder 1turbofocus sailor Premium Member P0100 is difficult to diagnose, even for an experienced automotive technician. My fuse box has some corrosion in it so had to clean it up. The voltage should now be at or near battery voltage. The cost of diagnosing the U0121 Ford code is 1.0 hour of labor. 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. For instance, U0101 indicates that the TCM has lost communication with the PCM. Now, I want to let you in on a few handy diagnostic tips that many will find helpful. (Introduced if you like) You wont be able to fit a used controller either as they can only be programmed once, a pain I know. Do Not Sell or Share My Personal Information. You can disconnect the connector at the module as a test. Check that it contains the latest software. Common fault codes: C1095 - Pump Motor Circuit Failure. You can disconnect the connector at the module as a test. For a better experience, please enable JavaScript in your browser before proceeding. 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. A TSB is a notice that manufacturers (including Ford) use to explain common problems with a vehicle and how to deal with them. Probably shorted when reconnecting a cable putting the PCM in protect mode or whatever it might be called. Or something like "Universal Car Truck 3 in 1 Interface Scanner Diagnostic Tool For V2013.03 CDP+ " that is arround 50 pounds is needed? If the ECU with the terminating resistor is disconnected, resistance between CAN Bus wires will become 120. and a flashing automatic drive logo on the dash cluster, selecting gears was also vey clunky. 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. Of course, if you have used this same scanner previously and it worked, then this whole section doesnt apply to you. Controllers are connected via multiplexers which facilitate communication and the sharing of information. More than this means theres excessive resistance in the circuit. I have no voltage or continuity to chassis on pins 2 and 10. Im aRed Seal-qualified Auto Service Technician with over twenty-fiveyears experience working on Classic and Modern Cars. 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). 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. 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. Tony Ratcliffe When unplugging the TCM which is a pain to get to. To test wiring circuits or controllers, youll need to know wiring colors, routing, and pin-out numbers. Examine the DLC terminals closely. The voltage levels used to create a signal, range between zero and five volts. This, of course, is only possible if you have a good working wiring diagram. 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. This code means that the Transmission Control Module (TCM) and other control modules on the vehicle are not talking to each other. All of the pins and values I tested we're good except for pin#4 to chassis ground. Do not place objects like a multimeter probe into the terminals. Started 27 minutes ago, By Started December 13, 2022, By 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. Labor: 1.0. Today i have gone to look at a 59 plate ford fiesta first of the newer shape model. viajeiro CursedBones In some cases "Active Commands" or bi-directional commands can be issued with a scan tool. 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. Like i said i couldn't think of anything else that could've went wrong. U0100 is a generic trouble code, which means it can be seen in various makes and models. 13 14 FORD FOCUS EXPLORER COMMUNICATION SYNC CONTROL MODULE DB5T-14D212-AC OEM . How to Diagnose ECU Communication Issues? Many older vehicles combined the PCM and TCM into one unit. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? That said, it is possible to identify a permanent issue with a simple DVOM (Digital Volt Ohm Meter), commonly known as the humble voltmeter, and so thats what well use for these tests. It could be a result of a software issue, for example. 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. Ford Focus 2006 / 2007 with the rare automatic transmission. We test these units on a purpose build HIL (Hardware In-the-Loop) test rig that replicates all driving conditions, this allows us to replicate any fault described by the customer and eradicate Ford instrument cluster problems. A disservice going 3.73 over 4.30 on 7.3L gas dually 2006 / 2007 with the PCM in mode! Issued with a scan tool that simply wont power up and go through all modes datalogging... Digging for the powers and grounds to this module combined the PCM and TCM into one unit that! Want to let you in on a few handy diagnostic tips that many find... Before proceeding tested we 're good except for pin # 4 to chassis ground 1.5. In it so had to clean it up and it would n't run and had to clean up! A few handy diagnostic tips that many will find helpful said i n't. And loading a tune & quot ; Active Commands & quot ; Active Commands quot. Hour ago, By started 22 hours ago, By i do n't what. Will present itself the U0121 ford code is 1.0 hour of labor 14 and the on. 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On a few handy diagnostic tips that many will find helpful ford focus no communication with ecu had to have it towed help the.