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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > 430d N57 - Drivetrain Fault and Fuel Supply Error
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      09-06-2022, 08:58 AM   #1
charliewaqs
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BMW 430d Gran Coupe - 2014
Just got this today in my car while parked up at home.

Car won't crank or start.. Will attach Carly diagnostic screenshots in next post. I thought it could be the high pressure fuel pump but I'm seeing a lot of DDE errors?
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      09-06-2022, 09:01 AM   #2
charliewaqs
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Carly screenshots below.
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      09-06-2022, 09:11 AM   #3
charliewaqs
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Some more…
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      09-06-2022, 09:36 AM   #4
charliewaqs
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I think I'm going to check the DDE relay
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      09-07-2022, 09:22 AM   #5
charliewaqs
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DDE relay ordered just in case. I've had a look at the wiring diagram on newtis.info and I don't believe it's any of the fuses either.

Can someone confirm what wires are positive and ground for the DME?
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      09-10-2022, 08:55 AM   #6
charliewaqs
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Ok so I put a new relay in but no luck. I got my circuit tester out and can confirm that:

1. I have power coming in to the DDE relay in pin 4 and out of pin 8 (DDE wake up signal)

2. I have power coming in to the DDE relay in pin 6 but not out of pin 2. This should be providing the main power to the DDE.

Bit confused what to do now as I just ordered a new relay directly from bmw (I'll find a way to test its functioning. I know if I jump the connection everything will probably work.
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      09-26-2022, 03:22 PM   #7
charliewaqs
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Resolved..

B+ Positive Wire that runs under the car was damaged...
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