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NOTE that Red/Gray wire passes through Pin #5 of Connector X60551 on the way from the DME to the Relay. NOTE that the DME “turns itself on” in that the Red/Gray wire from Pin #13 of Connector X60005 of the DME provides a ground signal to the K6300 DME Relay electromagnet. That is Battery power (NOTE the “30” above the fuse symbol indicating “Terminal 30” or Battery power).į4 ONLY supplies control system power, and NOT power for other DME functions. I would begin by using a multimeter or test light to confirm power at ONE of the two F4 sockets with the fuse removed. Here is the wiring diagram that shows how the DME is always powered by the 10 Amp fuse F4.
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Here are wiring diagrams, Installation Locations, and Connector Views to help you determine WHAT is NOT getting Power Supply (12V+ on multimeter or test light).
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Proper Diagnostics would suggest that you use a Multimeter (OR a test light would also work) to CONFIRM that the DME Relay is NOT being activated. So the two recurring codes indicate, consistent with the symptoms you describe, that your DME Relay (K6300 on the TIS schematic linked in the prior thread, which happens to be the correct Schematic for your 2008 335xi with N54) is NOT being activated to Supply Power to general DME functions, and to power the Sensors mentioned above. It still has Power Supply to the DME sufficient to have a Scan Tool connect & read Memory. To restate the observations from the prior post:ġ) It appears that the DME Relay is NOT being activatedĢ) If DME is NOT activated, the dashboard lights as normal when turning ignition ON, Radio, Blower, Wipers, Windows, Seats, and Starter all work as normal, BUTģ) The Engine will NOT fire, as the Sensors (Crankshaft & Camshaft) that time the DME pulse of Spark & Injectors are NOT powered, and the DME itself cannot function.
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So please feel free to have me try anything, I’m not super skilled with electrical diagnostics but am very mechanically inclined so bear with me. Now I am again able to connect via MHD/ProTools. Another round of search brought me to a coder who did a DME recovery for me. In the mist of flashing, the MHD app lost connection and no longer connecting to either MHD or Protools. I was then told to remove the JB4 completely and flash my custom tune back to stock via MHD. Then as I had the car off and updating some settings in the the app, it lost connection and random clicks of various electrical systems were turning on/off. I start experiencing random electrical issues, first the JB4 would no longer connect, the board was replaced and again the car started up immediately. The next day, the car would only crank but not start. Initially, the car ran normally after the water pump and battery was replaced. My water pump failed and overheat the car. Coolant oversprayed the engine bay and got into my ECM box (did not know this until after the fact).
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Replace the I01068 black relay after being told that was the DME relay.Ħ) Whether any codes OTHER than 2ACB & 2ACC Those are primarily the only two codes I get consistently, I ran several code check throughout each start attempt, here are the last two:ĢE85 – BSD message, electric coolant pump: missingĢCFB DME, Throttle-valve adaptation value (this may be caused by me pressing the throttle during start up)ĢD09 DME Throttle (this may be caused by me pressing the throttle during start up)Ī little back story on how this all happened. Checked all fuses in fuse box 3x times (no blown fuses), check for corroded and wet connector pins, no corrosion but I noticed a little moisture inside the left DME connector, dry out the pins and wipe the female connector, put all connectors back to stock with JB4 harness completely removed wipe and dry out the coolant from the ECM box Water pump was replaced and verified functioning No blown fuse or corrosion so it’s down to the the JB or DME.Ģ)I have access to MHD and BimmerGeeks ProToolģ) I currently do not have access to a multi-meter, have one at work but our state is under a Shelter-In-Place order so I can’t really leave the house. I did have some water damage due to a water pump failure that got coolant in the ECM box. I’m seriously thinking of replacing the JB and hopefully that fixes it. I have 2008 335xi- N54, I am experiencing a 2acb/2acc on my 335xi which has the same JB layout.