Guide de démarrage rapide - WOW! Würth Online World GmbH

BackgroundToday’s vehicles contain a large number of computers that monitor and control all functions and components in the vehicle. Thesecomputers are called Electronic Control Units (ECU). There are ECUs for engine management ( ECM), anti-lock brake system (ABS),gear box, immobilizer, central electronics and many more. Each ECU is programmed in the factory and contains software that isspecially designed for the model it is fitted in. The software in the ECM handles data to be able to control injection, ignition, idle,exhausts and more. This is done by collecting data from sensors in the system, that is interpreted and calculated and finally outputsignals are used to control components and actuators. Other ECUs work similar. An ABS/ESP control unit collects data fromaccelerometers and wheel speed sensors to be able to brake each wheel individually and secure a safe ride.Sometimes software is updated to improve fuel economy, exhausts or to fix separate faults in the original software. Updating thesoftware in an ECU is often a proactive action to prevent faults from appearing. Updating the software in the ECU is also called flashreprogramming or software download.For the OEM workshop the software download is relatively easy and straight forward because the mechanic has access to an adaptedtool connected directly to the OEM’s server. For the independent workshop this has previously been impossible to perform and theyhave been forced to take the vehicle to an OEM workshop.Euro 5 – Software downloadAccording to the Euro 5 legislation, which was implemented in September 2009, the independent workshop has been given thepossibility to perform what was earlier limited to the OEM workshop.With a generic interface anyone who has got a login at the vehicle manufacturer can perform a software download and update ECUswith the same result as an OEM tool. This works differently for each vehicle manufacturer. It can be an all web based solutions or inother cases there is a PC-software which connects the vehicle to the OEM server. This software can either be downloaded or distributedvia CD or DVD. Generally it is a fact that it is only online solutions available. The user/workshop cannot download ECU software to thecomputer and then later download it to the ECU.Software download in Euro5 regulations is performed via a web portal or a PC application which is connected to the internet and a VCI(Vehicle Communication Interface), which is connected between the vehicle and the computer. The VCI must be built according tocertain standards to be a Euro 5 Pass Thru VCI. There are standards both in ISO (International Organization for Standardization) andSAE (Society of Automotive Engineers). By converting the data that is collected from the internet the VCI makes it possible for thevehicle to communicate to the vehicle manufacturers web portals. There are a number of valid communication protocols according tothe standards. The protocol used in the specific case is controlled by the car, the VCI and the web portal.Fees for licenses, login and software are different depending on vehicle manufacturer. In some cases there are yearly licenses and insome cases you will pay a fee for a certain time of use. For example 1 hour, 1 day or 1 month when you have access to the informationon the web portal. For some brands you pay for the specific function or software to be downloaded. The coverage of functionality anddepth varies for the different vehicle manufacturers. In some cases there is only the legislated information and functionality available,and in other cases you will find information and functionalities for older vehicles and also with functions such as fault code reading, viewreal time data and adjustments.To perform a software download it requires both computer skills and experience. The mechanic will handle a computer, the VCI and theapplication for software download. There is also a requirement for a high speed internet connection.Non-compatible VCIDue to the fact that the Euro 5 Pass Thru device (VCI) is determined by certain standards, all devices should be the same, but thereality looks a bit different. There are devices that are not fully compatible and therefore do not work with all vehicle brands. It isimportant that you make sure you have a compatible VCI. The vehicle manufacturer do not sell their own tool for software download, butthey are forced to test and validate at least one independent VCI. These are normally listed on the web portals. This is not a limitationand also not validated VCI are working. The important is to use a VCI that is Euro 5 compatible. WOW! Flash Box is built according tothe standard and has extended functionality to be able to communicate also with vehicles not regulated by Euro 5.Is the update required?It is important to find out if the update is required before downloading new software to the ECU. Information is often to be found on thevehicle manufacturers web portals. In some cases you have to connect the vehicle and maybe pay the fee for a certain time period. Thismeans that you might have to pay just to find out that there is no new update available.Euro 5 Pass ThruIt is really important that the voltage supply does not drop below 12 volts during the entire process. Some operations might start powerconsuming components such as fans, pumps etc. which causes the voltage to drop. To ensure that the voltage is correct it isrecommended to use a high power battery charger with voltage surveillance. If the voltage drops the software download might fail and inworst case the ECU might be damaged.To become familiar with Euro 5 Pass Thru we recommend that You start with one brand and a vehicle that You have good access to,before downloading to a customer vehicle. Take your time and follow the instructions on the vehicle manufacturer web portals. If youhave questions how to move on, call the vehicle manufacturers support line. Information and support number is found on the web portal.Euro 5 Pass Thru requires a computer with internet connection and the operator should have experience in working with computers andthe internet.When you offer this service to your clients there are a few things you should be aware of and in some cases inform the customer.Software download is a service that cannot be reversed. When new software has been downloaded into a vehicle, there is no way to getthe previous software back. It is possible that a software download can change the driving characteristics. Engine idle might rise orreduce, gear shifting in an automatic gearbox may behave differently. This is not frequently the case, but it is important to inform thecustomer before taking action.The time to perform a software download varies for different brands and models. In some cases the entire software in the ECU isexchanged and in some multiple ECUs are updated, in sequence or simultaneously. The average time for a software download is 20minutes, but the fastest is less than a minute and it might take many hours to perform a software download.Software download might fail due to faults in the wiring harness or faults in the ECU. Other cause can be voltage drop during download.If the download fails, restart and make sure the preconditions are fulfilled and that all instructions are followed. If this does not help,contact the vehicle manufacturer support for Euro 5 Pass Thru programming.- 5 -