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So my question is: Are you sure its not a bad pump? Then install the fuel pressure gauge. When they fail completely you may be left with an engine that doesn't start. So recently my fuse for the fuel pump was blown. This website uses cookies to improve your experience while you navigate through the website. We also use third-party cookies that help us analyze and understand how you use this website. If it drops you could have a faulty fuel pump check valve or a leak in the fuel system. Green arrow points to where positive lead goes, Yellow arrow points to where black lead goes. Check out our complete Technical Article Directory for guides to many other procedures. Spare fuses and a pair of plastic forceps are set in holders on the distributor box. A faulty fuel pump can cause poor engine performance and hard starting problems. Front seat belts positioner control modules, Ignition coil interference suppression capacitor, B+ terminal (engine compartment), starter, battery, Secondary air injection mass airflow sensor. it is common for the faulty pump to damage the module. To confirm a pump can supply fuel pressure to the fuel rail, you can manually activate the fuel pump. Move away enough to access electrical connector on fuel pump module. First thing you have to do is remove the fuel test port cap. If a properly rated fuse continues to blow, it indicates a problem in the circuit that must be corrected. Pelican Parts is not associated with Porsche Cars North America in any manner, except for a mutual appreciation and love of the cars. BMW E90 3-Series Technical Articles (2006-2011), Page last updated: Wed 10/28/2020 08:48:10 PM. In this tech article, I will go over how to test fuel pressure and volume. From that I concluded that the fuel pump relay (control module) is faulty, but I have no idea where its located. I had this happen to be due to my fuel pump giving out. (green arrows). Green arrow points to where positive (+) lead goes, Yellow arrow points to where negative (-) lead goes. Old thread but just wanted to let members know in case someone else searches for this issue. For me and the Hummer, it turned out to be the fuel pump control module. 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. The EKP control module then activates the fuel pump … Upon replacing the both primary and auxiliary fuel pumps the problem still continued. This site was designed and produced solely by Pelican Parts. Use the DVOM in conjunction with a wiring diagram to determine the correct terminals for testing. Connect DVOM across fuel pump electrical connector terminals and take a reading, it should read battery volts when key is turned ON. 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. I suggest load testing using a test light and a DVOM. When testing, I usually see about 10 volts being sent to the fuel pump. F8 (5A) CD changer. See our tech article on engine cover removing. This category only includes cookies that ensures basic functionalities and security features of the website. Remove engine cover over fuel injectors. All Rights Reserved. You can access the fuel pump electrical connector and terminals under the rear seat cushion, below an access panel. In this video I show you how to upgrade from a second generation EKPM2 fuel pump control module to an EKPM3 third generation module. See our tech article on engine cover removing. I have to replace a fuel pump control unit on 2008 bmw 328i. FuseCheck.com © 2020. If the band is broken or melted, replace the fuse. 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. Replace the fuse as soon as possible. Pelican Parts is not responsible for any typographical errors contained within the site. Fuel pump relay: R9: Terminal 15 relay: F1 (15A) ^08/05: Transmission control module (TCM) F2 (5A)Aerial selection control module. 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! (green arrow), Hold the carpet out of the way, and then remove four 10mm nuts from access panel. 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. 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. Be sure to replace a bad fuse with a new one of the identical size and rating. But opting out of some of these cookies may have an effect on your browsing experience. 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. Anything more is a problem. To check a fuse, look at the silver-colored band inside the fuse. If no voltage is found, check ground to fuel pump and fuel pump fuse F70 in the junction box. ... Where the fuel filter is located. The pump actually burned out along with the auxiliary pump in the tank both located in under the passenger seats. When Start button is pressed, fuel pump will receive voltage for 3-5 seconds, if engine doesn't start. (green arrow). You also have the option to opt-out of these cookies. You will need an assistant to press the Start Stop button during the testing procedures. By entering this site, you agree to hold Pelican Parts free from any liability arising out of the use of any information contained within. There's a DIY for the fuel pump in the DIY section IIRC. Open the cover in the glove compartment and remove it. Pressure should drop no more than 0.5 bar in that time period. The wiring circuits in the vehicle are protected from short circuits by fuses. F5 (7,5A) Sunroof control. When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. Fuses of the same amperage can be temporarily borrowed from another fuse location if a fuse goes out. On E90 models, a fuel pump control module is used in place on the fuel pump relay. F6 (15A) Transmission control module (TCM) F7 (20A) Auxiliary heater control module. Once you test pressure. Rear power distribution panel (high amperage fuses); The line to B+ junction, starter, and alternator. The fuel pump is located in the right side of the fuel tank. Next, start or attempt to start engine. 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. Be sure that all test hoses are installed and routed properly. High current from a blown fuse might mean the pump is bad. Electrical testing Working in rear of vehicle interior; grab corner of rear seat cushion and pull up to detach locking tabs. Double check the fuse number with your model specific information. Now that you have access to the fuel pump terminals, you will connect your DVOM to the terminals by backprobing. 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). Got more questions? http://www.pelicanparts.com/bmw/catalog/shopcart/TOOL/POR_TOOL_WTD049_pg10.htm. F3 – F4 (5A) Ignition switch control module. These cookies do not store any personal information. Then allow fuel system to sit under pressure for 15 minutes. Information and technical articles within this website are for reference only. This website uses cookies to improve your experience. Consult authorized factory manuals when performing repair procedures. Join us in our BMW E90 Technical Forum Message Board and ask a question to one of our many automotive experts. The EKP control module converts this request into a corresponding engine speed for the fuel pump in the fuel tank. This greatly reduces the chance of damage caused by electrical problems. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the 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. Never attempt to repair a blown fuse and do not replace a defective fuse with a substitute of another color or amperage rating, otherwise, this could lead to a circuit overload, ultimately resulting in a fire in the vehicle.

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