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      03-30-2023, 01:14 PM   #3
gbalthrop
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Drives: 2007 328xi E91
Join Date: May 2017
Location: Fairfax Co, VA

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Quote:
Originally Posted by VehementCrom View Post
Pulled the motor/engine harness. Haven’t started this car in like 2 years 4 months. Finally back to that point, and I am doing my coolant bleeding procedure. The cluster is flashing all sorts of stuff and seems angry...
Your post IMPLIES that the engine was NOT running at the time the "Light Show" appeared on your Instrument Cluster. ALL of the displays (except ambient Temp) on the Instrument Cluster are from reading signals on K-CAN Bus, as opposed to "Hard-wired" signals on dedicated wires.

So first impression (see below for tests needed) is that you have an issue with bad connection, short to Ground or to B+ in K-CAN bus wiring somewhere. We can suggest HOW to test that IF further Diagnostics confirm such an issue.

Please provide answers to following questions, so we can suggest "Next Steps":
1) Last-7 Characters of VIN of your vehicle;
2) Make/Model of any Scan Tool or Diagnostic Software (INPA/ ISTA) available;
3) Whether engine was running or NOT when those photos taken showing warning lights on Cluster;
4) Does Starter Crank Engine?
5) Does Engine fire/ start when Starter Cranks for 2 seconds?
6) Does RPM value (~200 RPM or less) appear on Tach or Scan Tool Live Data for RPM during Starter Cranking?
7) Did you have any "Power Supply" external to battery attached when Light Show occurred? If so, does SAME thing happen when you simply charge battery and then disconnect Charger? Voltage Spikes can cause Cluster "Light Show" by interfering with K-CAN bus signals. Bad Voltage Regulator, causing "Over-voltage" or voltage spikes can do SAME when engine running.
George
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