TECHNICAL SERVICE BULLETIN: SERVICE ACTION: INTEGRATED LED HEADLAMP CONTROL UNIT OPERATION LOGIC IMPROVEMENT (SA567) - This bulletin provides information to upgrade the software on the Integrated LED Headlamp Control Unit 'ILCU' on certain 2024MY EV9 (MV) vehicles produced from September 25, 2023 through January 25, 2024. The ILCU can switch from 'standby mode' to 'active mode' potentially causing the 12V auxiliary battery to discharge while the vehicle is parked. If this occurs, the vehicle might not be able to be started.
