Hi, I'm hoping someone can help. I have recently become the proud owner of my dream car, an LCI E60 M5 June 2007 Model, I love it however have an electrical issue that is stopping me drive it as the oil level or temperature is not coming up.
I've got the following codes:
278F DME Intelligent Battery Sensor, Communication
278E DME Oil Condition Sensor
279B Alternator Communication Fault
Any help appreciated.
I've tried the following and loosing faith:
1. New battery
2. New oil level sensor
3. previous owner has had a new IBS sensor and alternator apparently.
4. tried to reset the codes with either of the IBS, oil level and alternator BSD Lin disconnected, all 3 come back up.
5. Checked DME connectors, look good.
6. Checked the voltage on the BDS LIN wire and it was around 2.4v and seemed to be fluctuating but I haven't had access to a scope to double check.
The strange thing is that when I reset the codes the car engine note changes and also the oil temperature gives a reading for about 20 seconds then the codes come up again and the reading drops to zero. I initially thought that there must be some comms coming from the combined oil level/temp sensor during that time however the oil temp reading came up even when this sensor was disconnected leading me to think that there may be another oil temp sensor connected to that gauge?
I haven't been to check wiring diagrams as haven't had access to ISTA, thinking I might need it to try and fault find further.
I've got the following codes:
278F DME Intelligent Battery Sensor, Communication
278E DME Oil Condition Sensor
279B Alternator Communication Fault
Any help appreciated.
I've tried the following and loosing faith:
1. New battery
2. New oil level sensor
3. previous owner has had a new IBS sensor and alternator apparently.
4. tried to reset the codes with either of the IBS, oil level and alternator BSD Lin disconnected, all 3 come back up.
5. Checked DME connectors, look good.
6. Checked the voltage on the BDS LIN wire and it was around 2.4v and seemed to be fluctuating but I haven't had access to a scope to double check.
The strange thing is that when I reset the codes the car engine note changes and also the oil temperature gives a reading for about 20 seconds then the codes come up again and the reading drops to zero. I initially thought that there must be some comms coming from the combined oil level/temp sensor during that time however the oil temp reading came up even when this sensor was disconnected leading me to think that there may be another oil temp sensor connected to that gauge?
I haven't been to check wiring diagrams as haven't had access to ISTA, thinking I might need it to try and fault find further.
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