ford focus no communication with ecu

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 wouldnt restart. If the instrument cluster fails while driving, then this will often cause the engine to cut out. Noise from fuel tank may be telling you the pump is bad, they can be heard to spin up and still be bad, the difference is HOW they spin up, you listen for the subtle little difference that says it's not working like usual. . Checked fuses and relais. Kieranfordguy Im a mechanic, and while were known for our MacGyver-type skills, we may not be generally prized for our finesse. Ford ECM/ECU/ PCM family numbers available: DPC-202DPC-203DPC-311DPC-312. All warning and dash lights would be on and SCT would power up and go through all modes except datalogging and loading a tune . Started 4 hours ago, By A visual test comes first. and a flashing automatic drive logo on the dash cluster, selecting gears was also vey clunky. 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. This using Ohms law makes the measurable resistance of 60 ohms. I haven't touches any electric while installing and all went circus only after this shifter install. 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. However, take note that there is no universal fix for the code. Wiring issues are the easiest thing to diagnose at home. 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 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. 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. Garage charge 40 + per hour. Labor: 1.0. I'll ask them if they took the battery out and tired. 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. Your link has been automatically embedded. 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. Also noticed cranking voltage dropped to 8.7v which won't allow idm to fire injectors. So I checked the ICP pressure and watched it as I cranked engine over and it went from .26v to 2.95v while cranking. Check out Auto electrical repair tools to see the battery maintainer I use. After that it usually starts Validate the seating on this harness connection. We dont know whats going on inside them, and we dont really care. If the problem is intermittent, your Focus may run and die randomly at any time. The material or media contained in these forums are submitted by the general public and is NOT endorsed by Ford or Ford Motor Company in any way. Common scan tool problems will be front and center. We are compensated for referring traffic and business to Amazon and other companies linked to on this site. But still no communication with the ECU. Alex.S We fully test every instrument cluster before and after the rebuild process to ensure every instrument cluster performs as originally intended by the manufacturer and is as good as, if not better than a brand new unit. Obviously there's more of an issue. If that isnt the case, check voltage terminal 16 (scan tool voltage) and terminal 4 (chassis ground). Display as a link instead, This is a sophisticated system that only a computer can manage. Vehicle computers are known by several names and acronyms, and to make things even more exciting, manufacturers use their own names. 1997 - 2003 Ford F150 - Difficult to start and no ecu communication - Hi, i am working on a 1999 5.4V8. $55.00 . Hey, ImJohn, and I'm a technical writer here at Rustyautos.com. Could be partial power from your gauge sweep issue too, pumps get wonky at low volts. See checking the Controller diagram below. 221,000 MILES. But the BCM may also share information about ABS activation. Started December 13, 2022, By Many tools offer free software upgrades. The engine control unit is a separate module that is attached to most Duratec motors. Try to fix it by myself or scrap it. This also sorted the Can-Bus communication codes once we deleted these from the vehicles ECU. I am new driver and its so disappointing. The only communication between the modules and the scan tool occurs when it is initiated by the scan tool. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. The other day I was driving arroud the city and a warning light came up. 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. nasan Started July 8, 2022, By 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. Clear editor. 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. DPC-315 DPC-401 DPC-402 DPC-405 DPC-411. 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. So I bought new Diagnostic scan tool to make sure that there is linking error. 01276 - ABS Hydraulic Pump. 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. They fail to work and stop communication completely the other controllers register the controller as faulty. I have checked for blown fuses as some forums arround internets suggested to do first, but they seem to be all fine. Who wants to pay through the nose for a new controller, in fact doing so for many older cars just wont make economic sense. If however the scanner is new or new to you, go ahead and check your scanners capability. Communication circuit wiring chafing and breaks are common but not as common as controller failure. (Two different names for the same thing). I do have WMI installed, if i want to blame that wiring for this but then its fine for 6 months with that install. In a long-winded way, Im saying your vehicles OBD connector, also known as the DLC (Datalink connector), may be damaged from possibly years of OBD scanning and, dare I say it, Front probing.. Started 20 hours ago, By If you can access codes from the PSCM module, then the U0131 code is either intermittent or a memory code. 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. Failure Date: 08/13/2022. The newer it is, the more likely it is that more modules are communicating with the PCM. Thank you Guys!!! 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. You can disconnect the connector at the module as a test. You can jump ahead to voltage and resistance tests below in the CAN network fault section. Place the voltmeter positive probe on terminal 6 and the negative on terminal 4. Ok Adding New Oil Without Draining? I have Ford Focus 2005 LX petrol hatchback. Turned out to be a vehicle speed sensor. Or check out the Amazon auto repair tools link below. The official Ford website can be found at http://www.ford.co.uk/, Really Need Help Ford Focus Ecu Communication Problem. Read More S-Max & Galaxy diesel engine ECU fault JavaScript is disabled. Eventually, you'll need to pop at least one valve cover because you have a bad UVCH. Controllers are connected via multiplexers which facilitate communication and the sharing of information. 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). Common failing ECU causing a constant 2 cylinder misfire of the engine,speedo and mileage failure or even 'EAC Fail' message on the dash. Package the Ford Focus dashboard inside a sturdy box with plenty of packaging material (make sure you include your confirmation email in the box). No communication with ECU 7.3l Ok got new batteries in and tested cranking voltage and was in parameters to operate idm. (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. Next morning the car would not start. Doing myself a disservice going 3.73 over 4.30 on 7.3L gas dually? Started 18 hours ago, By Required fields are marked *. 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 Ford ECM/ECU/ PCM with -12A650- in the OE part number can be repaired. That is a common issue most ford vehicles experience. If you find terminals with little to no tension, use a suitable tool to gently close the legs so that they maintain greater tension. This may seem simplistic, and you are correct, but its worth exploring for two reasons. Without them there will be a lot of noise on the CAN Bus. How guys from garage said.If there is some wiring problem that will cost fortune to me. Check that it contains the latest software. Most good scanners will have a detachable and, therefore, replaceable OBD cable. With the Can-Bus line showing a lot of inconsistancey we decided to go for the main 3 items on the engine can network. Common fault codes: C1095 - Pump Motor Circuit Failure. Use the min-max voltmeter function to capture the max voltages and min voltages. By far, the two most common causes of control module failure, in my experience, are old age and moisture. I never did the cable re adjustment when I installed my shift plate and curious if it could really cause an issue. Low voltages may distort your results. Guide with pics. Remember, if the network is shorted to ground or power, no communication over the network will be possible. 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. Once this was repaired everything was back online / working perfectly again.

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