The EKP control module converts this request into a corresponding engine speed for the fuel pump in the fuel tank. Electrical testing Working in rear of vehicle interior; grab corner of rear seat cushion and pull up to detach locking tabs. First thing you have to do is remove the fuel test port cap. See our tech article on Seats, removing. This site was designed and produced solely by Pelican Parts. Old thread but just wanted to let members know in case someone else searches for this issue. Next, start or attempt to start engine. (green arrows). By entering this site, you agree to hold Pelican Parts free from any liability arising out of the use of any information contained within. Necessary cookies are absolutely essential for the website to function properly. All pictures and references to the Porsche name, and the car names and shapes are for restoration reference only, and do not imply any association with Porsche. The Hummer had a high fuel pressure issue. In this photo, voltage head steady at current fuel pump demand. Upon replacing the both primary and auxiliary fuel pumps the problem still continued. I suggest load testing using a test light and a DVOM. Consult authorized factory manuals when performing repair procedures. This greatly reduces the chance of damage caused by electrical problems. You can access the fuel pump electrical connector and terminals under the rear seat cushion, below an access panel. Once you have removed the rear seat, peel the carpet away from the right side rear seat cushion area of body. See the rear of the cover for information on fuse assignment. Once you test pressure. do I need to take it to dealer for reprograming or is not ... i do know that it is recommended to replace both the pump and module at the same time. So my question is: Are you sure its not a bad pump? (green arrow), Hold the carpet out of the way, and then remove four 10mm nuts from access panel. Fuse box diagram (fuse layout), location and assignment of fuses BMW 3-Series E90/E91/E92/E93 (2005, 2006, 2007, 2008, 2009, 2010) 325i, 325xi, 328i, 328xi, 330i, 330xi, 335i, 335xi and M3. Next, install the fuel pressure gauge connecting line (green arrow). Instead of seeing what we are used to, battery volts supplied to the fuel pump, we now see a voltage dependent on fuel supply demand from the DME. Fuses of the same amperage can be temporarily borrowed from another fuse location if a fuse goes out. A faulty fuel pump can cause poor engine performance and hard starting problems. Pelican Parts is not responsible for any typographical errors contained within the site. There's a DIY for the fuel pump in the DIY section IIRC. Then connect an incandescent bulb style test light to battery ground and touch the test light probe tip the positive wire you are backprobing with DVOM. If the correct voltage is present, but pump does not activate, it is likely faulty. Double check the fuse number with your model specific information. Recharge fuel system by cycling key or running fuel pump, note fuel pressure. Connect DVOM across fuel pump terminals. This website uses cookies to improve your experience while you navigate through the website. The fuel pump module can be activated for testing using a BMW scan tool, if you do not have access to a BMW scan tool, attempting to start the vehicle will also activate the fuel pump control module, the module will send control voltage to the pump. Join us in our BMW E90 Technical Forum Message Board and ask a question to one of our many automotive experts. I have to replace a fuel pump control unit on 2008 bmw 328i. It is mandatory to procure user consent prior to running these cookies on your website. Green arrow points to where positive (+) lead goes, Yellow arrow points to where negative (-) lead goes. The EKP control module then activates the fuel pump … FuseCheck.com © 2020. On E90 models, a fuel pump control module is used in place on the fuel pump relay. If it drops you could have a faulty fuel pump check valve or a leak in the fuel system. F5 (7,5A) Sunroof control. The fuel pump is located in the right side of the fuel tank. http://www.pelicanparts.com/bmw/catalog/shopcart/TOOL/POR_TOOL_WTD049_pg10.htm. Be sure to replace a bad fuse with a new one of the identical size and rating. If no voltage is found, check ground to fuel pump and fuel pump fuse F70 in the junction box. High current from a blown fuse might mean the pump is bad. On E90 models, a fuel pump control module is used in place on the fuel pump relay. F3 – F4 (5A) Ignition switch control module. After some thorough testing it turned out to be the fuel control module which is located on the rear right back rest (the section closest to the door remove the slim piece) the control module is located under it. I had this happen to be due to my fuel pump giving out. it is common for the faulty pump to damage the module. Your reading should hold steady, a maximum drop in voltage of 0.5 volts is OK. All Rights Reserved. Move away enough to access electrical connector on fuel pump module. 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. When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. Use a fused jumper lead set to battery positive (+) and battery negative (-) and run pump. I took the seat off and realized that the pump never shuts off!!! Then install the fuel pressure gauge. To check a fuse, look at the silver-colored band inside the fuse. This category only includes cookies that ensures basic functionalities and security features of the website. Pressure should drop no more than 0.5 bar in that time period. You also have the option to opt-out of these cookies. Information and technical articles within this website are for reference only. Fuse box diagrams, fuse layouts and assignment. If you suspect your fuel pump has failed, you can confirm the fuel pump is received the correct voltage when commanded ON by the fuel pump control module using a digital volt ohm meter (DVOM). Open the cover in the glove compartment and remove it. Remove access panel lid from body by lifting up. These cookies will be stored in your browser only with your consent. Check out our Basic Maintenance section, which has all the parts you'll need to get your vehicle running its best, including filters, fluids, brakes, spark plugs, lighting, and more for your E90! Spare fuses and a pair of plastic forceps are set in holders on the distributor box. But opting out of some of these cookies may have an effect on your browsing experience. It just keeps pumping and pumping non-stop. We'll assume you're ok with this, but you can opt-out if you wish. If you replace the pump make sure to have a bucket with you since the pump will have gasoline in it and you'll be carrying it trough the interior of the car. ... Where the fuel filter is located. Applies to: 325i (2006), 325Xi (2006), 330i (2006), 330xi (2006), 328i (2007-2009), 335i (2007-2009). When testing, I usually see about 10 volts being sent to the fuel pump. You will need an assistant to press the Start Stop button during the testing procedures. Rear power distribution panel (high amperage fuses); The line to B+ junction, starter, and alternator. This website uses cookies to improve your experience. We also use third-party cookies that help us analyze and understand how you use this website. I tried to look for reasons why that happened, and while doing that another fuse was blown after a couple hours of putting it in. Front seat belts positioner control modules, Ignition coil interference suppression capacitor, B+ terminal (engine compartment), starter, battery, Secondary air injection mass airflow sensor. If the band is broken or melted, replace the fuse. Check out our complete Technical Article Directory for guides to many other procedures. Replace the fuse as soon as possible. So recently my fuse for the fuel pump was blown. The use of a fuse with a rating other than indicated may result in a dangerous electrical system overload. BMW E90 3-Series Technical Articles (2006-2011), Page last updated: Wed 10/28/2020 08:48:10 PM. Connect DVOM across fuel pump electrical connector terminals and take a reading, it should read battery volts when key is turned ON. F8 (5A) CD changer. After some thorough testing it turned out to be the fuel control module which is located on the rear right back rest (the section closest to the door remove the slim piece… Fuse box diagram (fuse layout), location and assignment of fuses of BMW 3-Series E90/E91/E92/E93 (2005-2010) 325i, 325xi, 328i, 328xi, 330i, 335i, M3. Be sure that all test hoses are installed and routed properly. Press Start Stop key like you wanted to start the engine, allow engine to crank if it doesn't start, DVOM should read around 10 volts. When Start button is pressed, fuel pump will receive voltage for 3-5 seconds, if engine doesn't start. Got more questions? When they fail completely you may be left with an engine that doesn't start. Remove engine cover over fuel injectors. See our tech article onà engine cover removing. Then allow fuel system to sit under pressure for 15 minutes. (green arrow). See our tech article onà engine cover removing. Now that you have access to the fuel pump terminals, you will connect your DVOM to the terminals by backprobing. Green arrow points to where positive lead goes, Yellow arrow points to where black lead goes. In this video I show you how to upgrade from a second generation EKPM2 fuel pump control module to an EKPM3 third generation module. In this tech article, I will go over how to test fuel pressure and volume.
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