I was trying out some HID kits the other day, which I did not end up using. In the process I got a "charging system failure" notice on the DIC. I swithched to the battery voltage readout which reads around 27 volts with the engine running. I promptly shut the car off and it still reads 19 volts without the engine running. I checked the battery with a DMM and it read a normal 12 volts off and 14 volts running, which makes me think that something in the car's electronics is registering the voltage wrong. What sends the voltage reading to the DIC? I know there is a battery current sensor on the ground wire by the battery but is there a voltage sensor somewhere or is it in the ECM? Has anyone seen this before? Any suggestions? I have no electronic mods on the car, I am not using the HID kit, and I don't have any accessories installed.
