Why is the battery draining on my CANbus?
After a 5 mile trip, the battery terminal voltage on point 24 was back to 14.0 vdc. This probably means there was some battery drain over night. Still suspect that the Controller Area Network (CAN) is not sleeping when the ignition is off.
Can a slow battery drain cause a fault?
IMHO – a slow battery drain is a precursor of a single fault to more significant controller network problems when the second electrical fault occurs. The Germans made the W220 CAN only single fault tolerant. Imagine!
Is the can B x0 / 35 bus related to battery drain?
Neither the CAN B X0/35 bus or the X0/34 bus have the Navigator or Instrument cluster controllers that threw error messages – those goes to the X0/36 bus under steering wheel. So, I still don’t know if the X0/35 bus junk or the error messages on the X0/36 bus are related to the battery drain problem.
Why does my command system drain my battery?
The D2B (fiberoptic network) does not show any programming mismatch shown in the photo below for the Command system. The voltage too low is probably a symptom of the battery draining.
When to disconnect battery from parasitic drain?
If you’re too busy during the workweek and can’t get to it until you’re off, some short term fixes are to disconnect the battery at night, and carry a portable jump starter in your vehicle.
What does it mean when your battery drains overnight?
Why the Battery Drains Overnight A slow battery drain when everything is off is called a parasitic power loss. This happens when something – a glovebox light, an amplifier, any electrical component – is pulling power from the battery when it shouldn’t.
What causes battery drain in Advance Auto Parts?
While you’re under the hood (or at Advance Auto Parts), test the alternator. A failed diode in the alternator creates a closed circuit that drains your battery even when the engine is off.