Update

Bulletin number

Update Bulletin

Component

Electrical system: 12v/24v/48v battery

Summary

UPDATE Technical Bulletin (TDI Battery Management Software): The battery can become discharged when the ECM "wakes-up" the CAN bus to do a diagnostic (~9 hours after vehicle shut-off). During that diagnostic time-window, if the door is opened or the ignition is switched ON, the ECM goes into a mode that can continuously wake-up the CAN bus, leading to excessive parasitic draw and a discharged battery while the vehicle is parked. This update has been proactively released to prevent the battery from becoming discharged due to a unique set of circumstances during the CAN bus diagnostic phase, leading to excessive parasitic draw and a discharged battery while the vehicle is parked.

Owners of these vehicles have filed 133 complaints in the electrical category.