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. High current from a blown fuse might mean the pump is bad. This category only includes cookies that ensures basic functionalities and security features of the website. It is mandatory to procure user consent prior to running these cookies on your website. From that I concluded that the fuel pump relay (control module) is faulty, but I have no idea where its located. Necessary cookies are absolutely essential for the website to function properly. Rear power distribution panel (high amperage fuses); The line to B+ junction, starter, and alternator. If it drops you could have a faulty fuel pump check valve or a leak in the fuel system. We also use third-party cookies that help us analyze and understand how you use this website.

A faulty fuel pump can cause poor engine performance and hard starting problems. This website uses cookies to improve your experience. Front seat belts positioner control modules, Ignition coil interference suppression capacitor, B+ terminal (engine compartment), starter, battery, Secondary air injection mass airflow sensor.

Old thread but just wanted to let members know in case someone else searches for this issue.

Use a fused jumper lead set to battery positive (+) and battery negative (-) and run pump. Upon replacing the both primary and auxiliary fuel pumps the problem still continued. Double check the fuse number with your model specific information. Applies to: 325i (2006), 325Xi (2006), 330i (2006), 330xi (2006), 328i (2007-2009), 335i (2007-2009). Fuse box diagrams, fuse layouts and assignment. (green arrow). 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.

I have to replace a fuel pump control unit on 2008 bmw 328i. When Start button is pressed, fuel pump will receive voltage for 3-5 seconds, if engine doesn't start. Remove engine cover over fuel injectors. 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. F8 (5A) CD changer. Fuel pump relay: R9: Terminal 15 relay: F1 (15A) ^08/05: Transmission control module (TCM) F2 (5A)Aerial selection control module. F3 – F4 (5A) Ignition switch control module. In this photo, voltage head steady at current fuel pump demand.

All Rights Reserved. These cookies do not store any personal information. (green arrow), Hold the carpet out of the way, and then remove four 10mm nuts from access panel. Got more questions? We'll assume you're ok with this, but you can opt-out if you wish. Next, install the fuel pressure gauge connecting line (green arrow). 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.

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. Green arrow points to where positive (+) lead goes, Yellow arrow points to where negative (-) lead goes. See our tech article on Seats, removing. Replace the fuse as soon as possible. (green arrows). Pelican Parts is not associated with Porsche Cars North America in any manner, except for a mutual appreciation and love of the cars. This greatly reduces the chance of damage caused by electrical problems. Connect DVOM across fuel pump electrical connector terminals and take a reading, it should read battery volts when key is turned ON. Spare fuses and a pair of plastic forceps are set in holders on the distributor box.

So my question is: Are you sure its not a bad pump? In this tech article, I will go over how to test fuel pressure and volume. For me and the Hummer, it turned out to be the fuel pump control module. See our tech article on engine cover removing. E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions, NA Engine (non-turbo) / Drivetrain / Exhaust Modifications, http://realoem.com/bmw/diagrams/b/n/233.png, Recommend this as a feature on the BimmerPost Homepage.

You also have the option to opt-out of these cookies. Electrical testing Working in rear of vehicle interior; grab corner of rear seat cushion and pull up to detach locking tabs. Next, start or attempt to start engine. Your reading should hold steady, a maximum drop in voltage of 0.5 volts is OK. To confirm a pump can supply fuel pressure to the fuel rail, you can manually activate the fuel pump. This website uses cookies to improve your experience while you navigate through the website. 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). Green arrow points to where positive lead goes, Yellow arrow points to where black lead goes.