Flash: Body Control Module (BCM) Updates
This bulletin involves reprogramming the Body Control
Module (BCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following DTC have been set:B25C9 - Driver Door Ajar Switch 2 Stuck Closed (Module, Powertrain Control (PCM)). Stored DTC only, this update is not for active fault.If B25C9 is an active fault normal diagnostic must be performed. This software update will not correct active DTC (2019 - 2020 years only). Customer may experience one or more of the following:The engine fails to start and requires a key cycle to restart the engine and the ignition must be cycled off without the brake applied in order to restart successfully with the brake applied. The siren might trigger randomly when the vehicle is armed and the engine is ?OFF?. Automatic close windows (comfort close windows) when the door's lock is activated after the ignition is ?OFF? and they open/close one door; sometimes windows may stay opened. The siren may be too loud when locking and unlocking the vehicle. The fuel gauge may fluctuate at ignition on, engine off. Increased horn delay when pressing the horn pad. After a key fob lock command the vehicle alarm triggers inadvertently.