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Answered in 1 minute by:
12/12/2017
Steve
Steve, BMW Expert
Category: BMW
Satisfied Customers: 25,927
Experience: BMW Expert
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Hello and welcome,

My name is ***** ***** it will be my pleasure to assist you today.

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have you checked voltage?

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Customer reply replied 8 months ago
battery is new and registered
Customer reply replied 8 months ago
is the Alternator
Customer reply replied 8 months ago
Have you seen anything like this
Customer reply replied 8 months ago
Forgot to mention there are some ABS codes should we leave them to later

I have not seen this subset of codes and there isn't really enough in those codes to definitively diagnose the underlying issue unfortunately. if voltage has been checked and is good and steady, there isn't anything else obvious I could point to for these codes other than possible the oil sensor or ibs or dme could be faulty.

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Customer reply replied 8 months ago
How would I determine if the IBS is bad

you would normally run the test plans as detailed within the bmw diagnosis system, there aren't manual tests to make.

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Customer reply replied 8 months ago
Do you have these test plans

they are only available within the bmw diagnosis system, bmw does not publish them or make any trouble shooting info available outside of its dealer network via this diagnosis system.

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Customer reply replied 8 months ago
No offense but this is not the answer I was expecting. Can I be connected to another BMW expert please
I can’t really control what is available to share or not. I will opt out of your question. If anyone else is able to help they will reply.
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Customer reply replied 8 months ago
Ok thank you
Marty
Marty, ASE Certified Technician
Category: BMW
Satisfied Customers: 55,280
Experience: ASE & Bosch Certified Master Tech. Over 30 years experience.
Verified

Hi, different expert here. My name is***** test plan for the IBS just calls for inspecting the connections. Make sure the plugs are connected and that you have 12V on the red wire. It's easy to disturb the connections at the IBS when replacing the battery. If everything is properly connected I would try a hard reset on the electrical system by disconnecting the battery cables and connecting the two cables together for 5 minutes. If the codes return I would replace the IBS. The BMW test plan is below.

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Customer reply replied 8 months ago
Thank you Marty for your response. Let me fill you in on all the codes because Steve and I were talking in a different forum and he requested I start a new question.

Can these codes be erased?

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Customer reply replied 8 months ago
the first one to come instantly is the oil level sensor.
Customer reply replied 8 months ago
I did the hard rest and have 12 volts at the IBS wire
Customer reply replied 8 months ago
Still nothing

First I would inspect the connections at the IBS. Next, at the oil level sensor, check the BSD wire, voltage supply and oil level sensor ground for open circuits. If all checks good I'd go ahead and replace the level sensor and see if the other codes return.

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Question, did you use an OEM alternator?

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Customer reply replied 8 months ago
the customer took the car to the dealership and they replaced alternator and registered an AGM battery
Customer reply replied 8 months ago
I took a voltage measurement from the alternator and I am getting a consistent 14.3 volts
Customer reply replied 8 months ago
I was looking at the wiring diagram and see three of these codes are on the same circuit
Customer reply replied 8 months ago
Would one defective item shut down the BSD communication

Yes it would. You can try disconnecting the oil level sensor and see if the other codes return.

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Customer reply replied 8 months ago
Ok I will do that in the morning

Ok, keep me posted.

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Customer reply replied 8 months ago
Ok disconnected the oil level sensor all codes return

Plug the oil sensor back in and disconnect the alternator and see what you get.

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Customer reply replied 8 months ago
Ok
Customer reply replied 8 months ago
Ok disconnected alternator and I am able to check oil now and now I get only two codes

It would seem to point to a faulty alternator. Reconnect the alternator and disconnect the green BSD wire at the IBS and see what you have for codes.

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You should be able to just unplug it.

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Customer reply replied 8 months ago
That was the first thing I did all the codes came back

I'm thinking bad alternator.

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Customer reply replied 8 months ago
That’s I’m thinking
Customer reply replied 8 months ago
I think this customer is putting aftermarket alternators
Customer reply replied 8 months ago
This vehicle should take only oem correct?

Gotta use OEM or Bosch or Valeo.

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Customer reply replied 8 months ago
Now I have to deal with the customer he said he replaced the alternator twice
Customer reply replied 8 months ago
I think he’s putting in junky alternators
Customer reply replied 8 months ago
From my understanding these alternators are not standard but smart alternators is that correct

I'd insist on your alternator. Let him return the defective one and get his money back.

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Correct

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Hi, just checking in. Have you made any progress?

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Customer reply replied 7 months ago
I will update you today alternator is coming out today

Great! Thanks for the update.

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Customer reply replied 7 months ago
I’m a Mercedes Specialist by trade I’m not a fan of BMWs

Very nice, but you need to get that Rolls outta there :-)

Let me know how you make out with the alternator.

Marty

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Customer reply replied 7 months ago
Ok will do

Thanks

Marty
Marty, ASE Certified Technician
Category: BMW
Satisfied Customers: 55,280
Experience: ASE & Bosch Certified Master Tech. Over 30 years experience.
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